PPPoE connection collapses on high upload

Hello everybody!

I'm trying to finally switch over to a fiberoptic internet connection. In the process of that I have also upgraded my home network, using MikroTik devices. I've managed to set it (the home network) up like I intended, and have used it for about two months with the old LTE ISP without complaint. However, when I try to use my new fiberoptic connection I run into a major issue.

The fiberoptic ISP uses PPPoE on top of the physical connection to authenticate their subscribers. I've managed to configure this, and can successfully establish an internet connection via this. However, when the upload gets high (above 425 MBit/s, contract is for 500 MBit/s), the PPPoE connection just collapses and theautomatic retry fails.

In the rest of this post I will describe the setup and the problem in more detail, and explain what I tried to fix it. I'll also include two configurations of the router.

I've tried everything I could think of or found online, but nothing has worked. Any advice on how to fix the issue or how to diagnose it further would be greatly appreciated.

Setup

Devices:

  • Router 1: hEX S 2025
  • Access Point 2: hAP ax²
  • Access Point 3: hAP ax²
  • Access Point 4: wAP ax
  • Coax-Modem 1 - 3: SYMARIX TGU 21 G.hn

Remarks:

  1. The coax modems together can be thought of like an unmanaged switch with ports that are really far apart.
  2. The coax modems, the access points and one server (not depicted) have static DHCP leases.
  3. The router can reach the old ISPs WiFi router (now in bridge mode) via VLAN 2. This VLAN is only configured on Access Point 2.
  4. In addition to the depicted VLANs the physical connection is also used untagged, because the coax modems themself cannot be reached via a VLAN.
  5. The VLANs reach Access Point 4 via an EoIP tunnel that I forgot to draw.
  6. The access points are managed by CAPsMAN running on Router 1.
  7. The SFP module was supplied by the ISP.

The issue

When I activate the PPPoE interface on the router, it quickly establishes a connection to the ISP. I can also use that connection. However, if the upload gets high, then the PPPoE connection collapses.

To put numbers on that: the collapse happens above 425 MBit/s, the contract is for 500 MBit/s.

I use a speedtest to trigger the issue, but I've also seen it happen on the speedtest of my local internet regulator.

The message displayed at the bottom of the window of the PPPoE interface in WinBox reads: "terminating... - failed to authenticate ourselves to peer"

What I've tried

  1. Talk to my ISP:

    • Apparently on their side the connection goes away because they no longer receive keepalive packages. The connection remains open for a long time if I don't trigger the problem, so I don't think that they receive no such packages at all.
    • They mentioned they had other customers with problems who used the hEX S 2025. However, it appears that those problems were fixed by disabling the auto negotiation on the SFP module (something I also had to do). The issue I'm posting about seems to be separate from that.
    • They recommended that I redo my router configuration.
  2. I started to reconfigure my router from scratch.

    • I did a lot of speedtests after every couple of options.
    • I got to the point where all I had left to do was enabling internet access for the VLANs and set up the WiFi. The issue still didn't appear.
  3. I decided to start from scratch again to add comment everywhere and to make sure I hadn't forgotten anything important.

    • I got to basically the same point again, and did a little bit more.
    • I did a speedtest, the issue immediately reappeared.
  4. I did a lot of online research, both on this forum and the general internet. I couldn't find anyone with this problem. A couple things were vaguely similar, but when I tried their solutions it still didn't work. Also, in all such cases there still were clear differences between their issue and mine.

  5. I reached out to the ISP for clarification on what exactly they mean by keepalive package.

    • I did this on friday afternoon, and haven't heard back yet. It seems that their support ends at noon that day. I'll update on this once I have an answer.
    • If they mean LCP echo replies (they send requests) that would be really confusing, because the logs state that a reply is sent a couple seconds before the connection collapses.
  6. I've monitored the hardware utilization.

    • The CPU never even crosses 50%.
    • Hardly any RAM is used at all.
  7. I've compared the configs from points 2 and 3. I can see nothing that would cause this in the diff. I've also tried applying all the differences individually on the broken config, and could not get it to work.

Configurations

I made the following changes to the configuration exports by hand. I did this to reduce the size of the diff output. I believe all these changes don't affect behaviour. If needed, I can post the original exports.

  • strip comments
  • rename interface lists to be identical
  • reorder list creation and membership assignment
  • synchronized interface names
  • redacted pppoe user
  • reorder vlan interfaces by vlan id
  • reorder bridge vlan settings by vlan id
  • reorder dhcp leases by ip
  • reorder firewall address lists by ip
  • remove log prefixes
  • change identity name (for privacy)
  • change static dns entries (for privacy)

Working Config

# 2025-11-16 16:02:53 by RouterOS 7.20.4
# software id = PAP1-2ZUP
#
# model = E60iUGS
# serial number = redacted
/interface bridge
add frame-types=admit-only-vlan-tagged name=bridge vlan-filtering=yes
/interface ethernet
set [ find default-name=sfp1 ] auto-negotiation=no speed=1G-baseX
/interface pppoe-client
add add-default-route=yes disabled=no interface=sfp1 keepalive-timeout=disabled name=isp use-peer-dns=yes user=redacted
/interface vlan
add interface=bridge name=vlan_meta vlan-id=1
add interface=bridge name=vlan_isp_old vlan-id=4
add interface=bridge name=vlan_resident vlan-id=10
add interface=bridge name=vlan_guest vlan-id=20
add interface=bridge name=vlan_iot vlan-id=30
add interface=bridge name=vlan_server vlan-id=40
/interface list
add name=list_discover
add name=list_inet
add name=list_lans
/ip pool
add name=pool_meta ranges=172.16.1.0-172.16.255.254
add name=pool_resident ranges=172.17.1.0-172.17.255.254
add name=pool_guest ranges=172.18.1.0-172.18.255.254
add name=pool_iot ranges=172.19.1.0-172.19.255.254
add name=pool_server ranges=172.20.1.0-172.20.255.254
/ip dhcp-server
add address-pool=pool_meta interface=vlan_meta lease-time=1d name=dhcp_meta
add address-pool=pool_resident interface=vlan_resident lease-time=1d name=dhcp_resident
add address-pool=pool_guest interface=vlan_guest lease-time=1d name=dhcp_guest
add address-pool=pool_iot interface=vlan_iot lease-time=1d name=dhcp_iot
add address-pool=pool_server interface=vlan_server lease-time=1d name=dhcp_server
/interface bridge port
add bridge=bridge interface=ether2
add bridge=bridge interface=ether3 pvid=20
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=ether4 pvid=20
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=ether5 pvid=20
/ip neighbor discovery-settings
set discover-interface-list=list_discover
/interface bridge vlan
add bridge=bridge tagged=bridge,ether3 untagged=ether2 vlan-ids=1
add bridge=bridge tagged=bridge,ether2 vlan-ids=4
add bridge=bridge tagged=bridge,ether2 vlan-ids=10
add bridge=bridge tagged=bridge,ether2 untagged=ether3,ether4,ether5 vlan-ids=20
add bridge=bridge tagged=bridge,ether2 vlan-ids=30
add bridge=bridge tagged=bridge,ether2 vlan-ids=40
/interface list member
add interface=vlan_meta list=list_discover
add interface=isp list=list_inet
add interface=vlan_meta list=list_lans
/ip address
add address=172.16.0.1/16 interface=vlan_meta network=172.16.0.0
add address=172.17.0.1/16 interface=vlan_resident network=172.17.0.0
add address=172.18.0.1/16 interface=vlan_guest network=172.18.0.0
add address=172.19.0.1/16 interface=vlan_iot network=172.19.0.0
add address=172.20.0.1/16 interface=vlan_server network=172.20.0.0
/ip dhcp-client
add default-route-distance=2 interface=vlan_isp_old use-peer-ntp=no
/ip dhcp-server lease
add address=172.16.0.2 mac-address=F4:1E:57:F3:4B:F1 server=dhcp_meta
add address=172.16.0.3 mac-address=F4:1E:57:F3:4C:68 server=dhcp_meta
add address=172.16.0.4 mac-address=F4:1E:57:EC:EA:DE server=dhcp_meta
add address=172.16.0.11 mac-address=00:05:9E:48:A2:17 server=dhcp_meta
add address=172.16.0.12 mac-address=00:05:9E:48:A2:29 server=dhcp_meta
add address=172.16.0.13 mac-address=00:05:9E:48:A4:F2 server=dhcp_meta
add address=172.20.0.100 mac-address=7C:D3:0A:35:EB:5B server=dhcp_server
/ip dhcp-server network
add address=172.16.0.0/16 gateway=172.16.0.1
add address=172.17.0.0/16 gateway=172.17.0.1
add address=172.18.0.0/16 gateway=172.18.0.1
add address=172.19.0.0/16 gateway=172.19.0.1
add address=172.20.0.0/16 gateway=172.20.0.1
/ip firewall address-list
add address=0.0.0.0/8 list=not_inet
add address=10.0.0.0/8 list=not_inet
add address=100.64.0.0/10 list=not_inet
add address=127.0.0.0/8 list=not_inet
add address=169.254.0.0/16 list=not_inet
add address=172.16.0.0/12 list=not_inet
add address=172.16.0.0/16 list=lan
add address=192.0.0.0/24 list=not_inet
add address=192.0.2.0/24 list=not_inet
add address=192.88.99.0/24 list=not_inet
add address=192.168.0.0/16 list=not_inet
add address=198.18.0.0/15 list=not_inet
add address=198.51.100.0/24 list=not_inet
add address=203.0.113.0/24 list=not_inet
add address=224.0.0.0/4 list=not_inet
add address=240.0.0.0/4 list=not_inet
/ip firewall filter
add action=accept chain=input connection-state=established,related
add action=drop chain=input connection-state=invalid
add action=drop chain=input dst-port=22,8291 in-interface=!vlan_meta protocol=tcp
add action=accept chain=input protocol=icmp
add action=accept chain=input in-interface-list=list_lans
add action=drop chain=input
add action=fasttrack-connection chain=forward connection-state=established,related hw-offload=yes
add action=accept chain=forward connection-state=established,related
add action=drop chain=forward connection-state=invalid
add action=drop chain=forward dst-address-list=not_inet out-interface-list=list_inet
add action=jump chain=forward in-interface-list=list_inet jump-target=inet
add action=jump chain=forward in-interface=vlan_meta jump-target=meta
add action=jump chain=forward in-interface=vlan_resident jump-target=resident
add action=jump chain=forward in-interface=vlan_guest jump-target=guest
add action=jump chain=forward in-interface=vlan_iot jump-target=iot
add action=jump chain=forward in-interface=vlan_server jump-target=server
add action=drop chain=forward
add action=drop chain=inet src-address-list=not_inet
add action=drop chain=inet disabled=yes dst-address-list=not_inet
add action=jump chain=inet jump-target=inet_icmp protocol=icmp
add action=drop chain=inet
add action=accept chain=inet_icmp icmp-options=0:0-255 protocol=icmp
add action=accept chain=inet_icmp icmp-options=3:0-255 protocol=icmp
add action=accept chain=inet_icmp icmp-options=8:0-255 protocol=icmp
add action=accept chain=inet_icmp icmp-options=11:0-255 protocol=icmp
add action=accept chain=inet_icmp icmp-options=12:0-255 protocol=icmp
add action=drop chain=inet_icmp
add action=accept chain=meta out-interface-list=list_inet
add action=drop chain=meta
add action=accept chain=resident out-interface-list=list_inet
add action=accept chain=resident out-interface=vlan_iot
add action=accept chain=resident out-interface=vlan_server
add action=drop chain=resident
add action=accept chain=guest out-interface-list=list_inet
add action=accept chain=guest out-interface=vlan_server
add action=drop chain=guest
add action=accept chain=iot out-interface-list=list_inet
add action=accept chain=iot out-interface=vlan_server
add action=drop chain=iot
add action=accept chain=server out-interface-list=list_inet
add action=drop chain=server
/ip firewall nat
add action=masquerade chain=srcnat out-interface=isp src-address=172.16.0.0/16
/ip service
set ftp disabled=yes
set telnet disabled=yes
set www disabled=yes
set api disabled=yes
set api-ssl disabled=yes
/ipv6 firewall address-list
add address=::/128 list=not_inet
add address=::1/128 list=not_inet
add address=::ffff:0.0.0.0/96 list=not_inet
add address=64:ff9b::/96 list=not_inet
add address=64:ff9b:1::/48 list=not_inet
add address=100::/64 list=not_inet
add address=2001:20::/28 list=not_inet
add address=2001:db8::/32 list=not_inet
add address=3fff::/20 list=not_inet
add address=5f00::/16 list=not_inet
add address=fc00::/7 list=not_inet
add address=fe80::/10 list=not_inet
/ipv6 firewall filter
add action=accept chain=input connection-state=established,related
add action=drop chain=input connection-state=invalid
add action=accept chain=input protocol=icmpv6
add action=accept chain=input dst-port=33434-33534 protocol=udp
add action=drop chain=input
add action=fasttrack-connection chain=forward connection-state=established,related
add action=accept chain=forward connection-state=established,related
add action=drop chain=forward connection-state=invalid
add action=drop chain=forward dst-address-list=not_inet out-interface-list=list_inet
add action=jump chain=forward in-interface-list=list_inet jump-target=inet
add action=jump chain=forward in-interface=vlan_meta jump-target=meta
add action=jump chain=forward in-interface=vlan_resident jump-target=resident
add action=jump chain=forward in-interface=vlan_guest jump-target=guest
add action=jump chain=forward in-interface=vlan_iot jump-target=iot
add action=jump chain=forward in-interface=vlan_server jump-target=server
add action=drop chain=forward
add action=drop chain=inet src-address-list=not_inet
add action=jump chain=inet jump-target=inet_icmp protocol=icmpv6
add action=drop chain=inet
add action=accept chain=inet_icmp icmp-options=1:0-255 protocol=icmpv6
add action=accept chain=inet_icmp icmp-options=2:0-255 protocol=icmpv6
add action=accept chain=inet_icmp icmp-options=128:0-255 protocol=icmpv6
add action=accept chain=inet_icmp icmp-options=129:0-255 protocol=icmpv6
add action=drop chain=inet_icmp
add action=accept chain=meta out-interface-list=list_inet
add action=drop chain=meta
add action=accept chain=resident out-interface-list=list_inet
add action=accept chain=resident in-interface=vlan_iot
add action=accept chain=resident in-interface=vlan_server
add action=drop chain=resident
add action=accept chain=guest out-interface-list=list_inet
add action=accept chain=guest out-interface=vlan_server
add action=drop chain=guest
add action=accept chain=iot out-interface-list=list_inet
add action=accept chain=iot out-interface=vlan_server
add action=drop chain=iot
add action=accept chain=server out-interface-list=list_inet
add action=drop chain=server
/system clock
set time-zone-name=Europe/Vienna

Broken Config

# 2025-11-16 16:17:48 by RouterOS 7.20.4
# software id = PAP1-2ZUP
#
# model = E60iUGS
# serial number = redacted
/interface bridge
add frame-types=admit-only-vlan-tagged name=bridge protocol-mode=none vlan-filtering=yes
/interface ethernet
set [ find default-name=ether1 ] disabled=yes
set [ find default-name=ether4 ] disabled=yes
set [ find default-name=ether5 ] disabled=yes
set [ find default-name=sfp1 ] auto-negotiation=no speed=1G-baseX
/interface pppoe-client
add add-default-route=yes disabled=no interface=sfp1 keepalive-timeout=disabled name=isp use-peer-dns=yes user=redacted
/interface vlan
add interface=bridge name=vlan_meta vlan-id=1
add interface=bridge name=vlan_isp_old vlan-id=4
add interface=bridge name=vlan_resident vlan-id=10
add interface=bridge name=vlan_guest vlan-id=20
add interface=bridge name=vlan_iot vlan-id=30
add interface=bridge name=vlan_server vlan-id=40
/interface list
add name=list_discover
add name=list_inet
add name=list_lans
/ip pool
add name=pool_meta ranges=172.16.1.0-172.16.255.254
add name=pool_resident ranges=172.17.1.0-172.17.255.254
add name=pool_guest ranges=172.18.1.0-172.18.255.254
add name=pool_iot ranges=172.19.1.0-172.19.255.254
add name=pool_server ranges=172.20.1.0-172.20.255.254
/ip dhcp-server
add address-pool=pool_meta interface=vlan_meta lease-time=1d name=dhcp_meta
add address-pool=pool_resident interface=vlan_resident lease-time=1d name=dhcp_resident
add address-pool=pool_guest interface=vlan_guest lease-time=1d name=dhcp_guest
add address-pool=pool_iot interface=vlan_iot lease-time=1d name=dhcp_iot
add address-pool=pool_server interface=vlan_server lease-time=1d name=dhcp_server
/ipv6 pool
add name=unique_local prefix=fd86:e49c:8c3::/48 prefix-length=64
/ip smb
set enabled=no
/interface bridge port
add bridge=bridge interface=ether2
add bridge=bridge interface=ether3 pvid=20
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=ether4 pvid=20
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=ether5 pvid=20
/ip neighbor discovery-settings
set discover-interface-list=list_discover
/interface bridge vlan
add bridge=bridge tagged=bridge,ether3 untagged=ether2 vlan-ids=1
add bridge=bridge tagged=bridge,ether2 vlan-ids=10
add bridge=bridge tagged=bridge,ether2 untagged=ether3,ether4,ether5 vlan-ids=20
add bridge=bridge tagged=bridge,ether2 vlan-ids=30
add bridge=bridge tagged=bridge,ether2 vlan-ids=40
/interface list member
add interface=vlan_meta list=list_discover
add interface=vlan_isp_old list=list_inet
add interface=ether1 list=list_inet
add interface=isp list=list_inet
add interface=vlan_guest list=list_lans
add interface=vlan_iot list=list_lans
add interface=vlan_meta list=list_lans
add interface=vlan_resident list=list_lans
add interface=vlan_server list=list_lans
/ip address
add address=172.16.0.1/16 interface=vlan_meta network=172.16.0.0
add address=172.17.0.1/16 interface=vlan_resident network=172.17.0.0
add address=172.18.0.1/16 interface=vlan_guest network=172.18.0.0
add address=172.19.0.1/16 interface=vlan_iot network=172.19.0.0
add address=172.20.0.1/16 interface=vlan_server network=172.20.0.0
/ip dhcp-client
# Interface not active
add default-route-distance=2 interface=ether1
add default-route-distance=3 interface=vlan_isp_old
/ip dhcp-server lease
add address=172.16.0.2 mac-address=F4:1E:57:F3:4B:F1 server=dhcp_meta
add address=172.16.0.3 mac-address=F4:1E:57:F3:4C:68 server=dhcp_meta
add address=172.16.0.4 mac-address=F4:1E:57:EC:EA:DE server=dhcp_meta
add address=172.16.0.11 mac-address=00:05:9E:48:A2:17 server=dhcp_meta
add address=172.16.0.12 mac-address=00:05:9E:48:A2:29 server=dhcp_meta
add address=172.16.0.13 mac-address=00:05:9E:48:A4:F2 server=dhcp_meta
add address=172.20.0.100 mac-address=7C:D3:0A:35:EB:5B server=dhcp_server
/ip dhcp-server network
add address=172.16.0.0/16 gateway=172.16.0.1
add address=172.17.0.0/16 gateway=172.17.0.1
add address=172.18.0.0/16 gateway=172.18.0.1
add address=172.19.0.0/16 gateway=172.19.0.1
add address=172.20.0.0/16 gateway=172.20.0.1
/ip dns
set allow-remote-requests=yes
/ip dns static
add cname=device2.dev.mydomain.invalid name=www.cloud.invalid type=CNAME
add address=172.20.0.100 name=device2.dev.mydomain.invalid type=A
add address=fd86:e49c:8c3:4:fcbb:d9b6:7ff1:79db name=device2.dev.mydomain.invalid type=AAAA
/ip firewall address-list
add address=0.0.0.0/8 list=not_inet
add address=10.0.0.0/8 list=not_inet
add address=100.64.0.0/10 list=not_inet
add address=127.0.0.0/8 list=not_inet
add address=169.254.0.0/16 list=not_inet
add address=172.16.0.0/12 list=not_inet
add address=172.16.0.0/16 list=lan
add address=172.17.0.0/16 list=lan
add address=172.18.0.0/16 list=lan
add address=172.19.0.0/16 list=lan
add address=172.20.0.0/16 list=lan
add address=192.0.0.0/24 list=not_inet
add address=192.0.2.0/24 list=not_inet
add address=192.88.99.0/24 list=not_inet
add address=192.168.0.0/16 list=not_inet
add address=198.18.0.0/15 list=not_inet
add address=198.51.100.0/24 list=not_inet
add address=203.0.113.0/24 list=not_inet
add address=224.0.0.0/4 list=not_inet
add address=240.0.0.0/4 list=not_inet
/ip firewall filter
add action=accept chain=input connection-state=established,related
add action=drop chain=input connection-state=invalid
add action=drop chain=input dst-port=22,8291 in-interface=!vlan_meta protocol=tcp
add action=accept chain=input protocol=icmp
add action=accept chain=input in-interface-list=list_lans
add action=drop chain=input
add action=fasttrack-connection chain=forward connection-state=established,related hw-offload=yes
add action=accept chain=forward connection-state=established,related
add action=drop chain=forward connection-state=invalid
add action=drop chain=forward dst-address-list=not_inet out-interface-list=list_inet
add action=jump chain=forward in-interface-list=list_inet jump-target=inet
add action=jump chain=forward in-interface=vlan_meta jump-target=meta
add action=jump chain=forward in-interface=vlan_resident jump-target=resident
add action=jump chain=forward in-interface=vlan_guest jump-target=guest
add action=jump chain=forward in-interface=vlan_iot jump-target=iot
add action=jump chain=forward in-interface=vlan_server jump-target=server
add action=drop chain=forward
add action=drop chain=inet src-address-list=not_inet
add action=accept chain=inet icmp-options=0:0-255 protocol=icmp
add action=accept chain=inet icmp-options=3:0 protocol=icmp
add action=accept chain=inet icmp-options=3:1 protocol=icmp
add action=accept chain=inet icmp-options=3:4 protocol=icmp
add action=accept chain=inet icmp-options=8:0-255 protocol=icmp
add action=accept chain=inet icmp-options=11:0-255 protocol=icmp
add action=accept chain=inet icmp-options=12:0-255 protocol=icmp
add action=accept chain=inet connection-nat-state=dstnat connection-state=new disabled=yes
add action=drop chain=inet
add action=accept chain=meta out-interface-list=list_inet
add action=drop chain=meta
add action=accept chain=resident out-interface-list=list_inet
add action=accept chain=resident out-interface=vlan_iot
add action=accept chain=resident out-interface=vlan_server
add action=drop chain=resident
add action=accept chain=guest out-interface-list=list_inet
add action=accept chain=guest out-interface=vlan_server
add action=drop chain=guest
add action=accept chain=iot out-interface-list=list_inet
add action=accept chain=iot out-interface=vlan_server
add action=drop chain=iot
add action=accept chain=server out-interface-list=list_inet
add action=drop chain=server
/ip firewall nat
add action=masquerade chain=srcnat out-interface-list=list_inet src-address-list=lan
/ip service
set ftp disabled=yes
set telnet disabled=yes
set www disabled=yes
set api disabled=yes
set api-ssl disabled=yes
/ipv6 address
add address=::1 from-pool=unique_local interface=vlan_meta
add address=::1 from-pool=unique_local interface=vlan_resident
add address=::1 from-pool=unique_local interface=vlan_guest
add address=::1 from-pool=unique_local interface=vlan_iot
add address=::1 from-pool=unique_local interface=vlan_server
/ipv6 firewall address-list
add address=::/128 list=not_inet
add address=::1/128 list=not_inet
add address=::ffff:0.0.0.0/96 list=not_inet
add address=64:ff9b::/96 list=not_inet
add address=64:ff9b:1::/48 list=not_inet
add address=100::/64 list=not_inet
add address=2001:20::/28 list=not_inet
add address=2001:db8::/32 list=not_inet
add address=3fff::/20 list=not_inet
add address=5f00::/16 list=not_inet
add address=fc00::/7 list=not_inet
add address=fe80::/10 list=not_inet
/ipv6 firewall filter
add action=accept chain=input connection-state=established,related
add action=drop chain=input connection-state=invalid
add action=accept chain=input protocol=icmpv6
add action=accept chain=input dst-port=33434-33534 protocol=udp
add action=accept chain=input dst-port=22,8291 in-interface=vlan_meta protocol=tcp
add action=accept chain=input disabled=yes src-address=ff00::/8
add action=drop chain=input
add action=fasttrack-connection chain=forward connection-state=established,related
add action=accept chain=forward connection-state=established,related
add action=drop chain=forward connection-state=invalid
add action=drop chain=forward dst-address-list=not_inet out-interface-list=list_inet
add action=jump chain=forward in-interface-list=list_inet jump-target=inet
add action=jump chain=forward in-interface=vlan_meta jump-target=meta
add action=jump chain=forward in-interface=vlan_resident jump-target=resident
add action=jump chain=forward in-interface=vlan_guest jump-target=guest
add action=jump chain=forward in-interface=vlan_iot jump-target=iot
add action=jump chain=forward in-interface=vlan_server jump-target=server
add action=drop chain=forward
add action=drop chain=inet src-address-list=not_inet
add action=accept chain=inet icmp-options=1:0-255 protocol=icmpv6
add action=accept chain=inet icmp-options=2:0-255 protocol=icmpv6
add action=accept chain=inet icmp-options=128:0-255 protocol=icmpv6
add action=accept chain=inet icmp-options=129:0-255 protocol=icmpv6
add action=drop chain=inet
add action=accept chain=inet disabled=yes out-interface=vlan_server
add action=accept chain=meta out-interface-list=list_inet
add action=drop chain=meta
add action=accept chain=resident out-interface-list=list_inet
add action=accept chain=resident in-interface=vlan_iot
add action=accept chain=resident in-interface=vlan_server
add action=drop chain=resident
add action=accept chain=guest out-interface-list=list_inet
add action=accept chain=guest out-interface=vlan_server
add action=drop chain=guest
add action=accept chain=iot out-interface-list=list_inet
add action=accept chain=iot out-interface=vlan_server
add action=drop chain=iot
add action=accept chain=server out-interface-list=list_inet
add action=drop chain=server
/ipv6 nd
set [ find default=yes ] disabled=yes
add interface=vlan_meta
add interface=vlan_resident
add interface=vlan_guest
add interface=vlan_iot
add interface=vlan_server
/system clock
set time-zone-name=Europe/Vienna
/system identity
set name=PrivNet01
/system logging
add topics=pppoe

Hello! PPPoE client is known to be unstable on latest “stable” version 7.20.4.

You should downgrade to a version prior to 7.20 because many users reported problems on 7.20.x. Be sure to update/downgrade the RouterBoard firmware also to match the RouterOS version.

Also, enable keepalive timeout on the pppoe client and set it to a value of ~30 seconds. If it is disabled, your router won’t probe the connection and the client will remain connected even if the session was terminated by the ISP or by any other equipment failing/restarting.

terminating... - failed to authenticate ourselves to peer” message means that your ISP’s BRAS server isn’t recognizing your PPPoE credentials. This message also appears when there is a authentification protocol mismatch(PAP vs CHAP, etc).

Enable debug logging for the PPPoE and also “packets” to see what is your router and ISP’s BRAS comunicating.

Thank you for your response, RaresC95!


The ISP has clarified that they indeed mean LCP echo replies. This confuses me. In the log further down you can see that an echo response is sent a mere 12 seconds before the connection collapses.


I've now tried the following:

  1. Downgrade RouterOS to version 7.19.6
  2. Downgrade the firmware to the same.
  3. Activate the keepalive timeout with a value of 30.

After establishing the connection I then ran a speed test. Once the upload part started, the connection collapsed almost immediately, just as described in my original post.


This is the pppoe log of an attempt I made yesterday. In retrospect I should have included it in the original post, but I did not think of it at the time. This means it was made using v7.20.4.

I changed the actual addresses, but made sure that all ocurrences were changed to be still exactly the same.

It doesn't seem to contain any additional information on why the connection drops. The reason for the reconnect seems to be some kind of rate limiting. I knew that I needed to manually stop the interface and wait a bit before reenabling it, for it to connect. This seems to match.

By "packets" log, do you mean the packet topic? If so, I'll try that tomorrow.

Nov/16/2025 19:23:23 pppoe,ppp,info isp: initializing...
Nov/16/2025 19:23:23 pppoe,ppp,info isp: connecting...
Nov/16/2025 19:23:23 pppoe,debug,packet sfp1: sent PADI to FF:FF:FF:FF:FF:FF
Nov/16/2025 19:23:23 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 19:23:23 pppoe,debug,packet     host-uniq=0xac0001
Nov/16/2025 19:23:23 pppoe,debug,packet     service-name=
Nov/16/2025 19:23:23 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 19:23:23 pppoe,debug,packet sfp1: rcvd PADO from GG:GG:GG:GG:GG:GG
Nov/16/2025 19:23:23 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 19:23:23 pppoe,debug,packet     host-uniq=0xac0001
Nov/16/2025 19:23:23 pppoe,debug,packet     service-name=
Nov/16/2025 19:23:23 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 19:23:23 pppoe,debug,packet     ac-name=bras-region-01.core.myisp.net
Nov/16/2025 19:23:23 pppoe,debug,packet sfp1: sent PADR to GG:GG:GG:GG:GG:GG
Nov/16/2025 19:23:23 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 19:23:23 pppoe,debug,packet     host-uniq=0xac0002
Nov/16/2025 19:23:23 pppoe,debug,packet     service-name=
Nov/16/2025 19:23:23 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 19:23:23 pppoe,debug,packet sfp1: rcvd PADS from GG:GG:GG:GG:GG:GG
Nov/16/2025 19:23:23 pppoe,debug,packet     session-id=0x932b
Nov/16/2025 19:23:23 pppoe,debug,packet     host-uniq=0xac0002
Nov/16/2025 19:23:23 pppoe,debug,packet     service-name=
Nov/16/2025 19:23:23 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 19:23:23 pppoe,ppp,debug isp: LCP lowerup
Nov/16/2025 19:23:23 pppoe,ppp,debug isp: LCP open
Nov/16/2025 19:23:23 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 19:23:23 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x1
Nov/16/2025 19:23:23 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:23 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:23 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x1
Nov/16/2025 19:23:23 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:23 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:24 pppoe,debug,packet sfp1: rcvd PADO from II:II:II:II:II:II
Nov/16/2025 19:23:24 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 19:23:24 pppoe,debug,packet     host-uniq=0xac0001
Nov/16/2025 19:23:24 pppoe,debug,packet     service-name=
Nov/16/2025 19:23:24 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 19:23:24 pppoe,debug,packet     ac-name=bras-region-02.core.myisp.net
Nov/16/2025 19:23:24 pppoe,debug sfp1: received PADO with unknown host-uniq, dropping
Nov/16/2025 19:23:24 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 19:23:24 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x2
Nov/16/2025 19:23:24 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:24 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:24 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x2
Nov/16/2025 19:23:24 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:24 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:26 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 19:23:26 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x3
Nov/16/2025 19:23:26 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:26 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:26 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x3
Nov/16/2025 19:23:26 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:26 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x4
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x4
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <magic 0x196a6d38>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd LCP ConfReq id=0x2
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <magic 0xf3dd7690>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent LCP ConfAck id=0x2
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <magic 0xf3dd7690>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: LCP opened
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd CHAP Challenge id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <challenge len=16>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <name Huawei>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent CHAP Response id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <response len=16>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <name redacted>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd CHAP Success id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     Authentication success,Welcome!
Nov/16/2025 19:23:28 pppoe,ppp,info isp: authenticated
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: IPCP lowerup
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: IPCP open
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent IPCP ConfReq id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <addr 0.0.0.0>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 0.0.0.0>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 0.0.0.0>
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: IPV6CP lowerup
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: IPV6CP open
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent IPV6CP ConfReq id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <interface-identifier jjjj:jjjj:j:j>
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: MPLSCP lowerup
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: MPLSCP open
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent MPLSCP ConfReq id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: BCP open
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: CCP lowerup
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: CCP open
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd IPCP ConfReq id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <addr 1.1.1.1>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent IPCP ConfAck id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <addr 1.1.1.1>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd IPV6CP ConfReq id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <interface-identifier 96b2:71ff:feea:7150>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent IPV6CP ConfAck id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <interface-identifier 96b2:71ff:feea:7150>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd LCP ProtRej id=0x3
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet      82 81
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd IPCP ConfNak id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <addr 2.2.2.2>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 3.3.3.3>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 4.4.4.4>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: sent IPCP ConfReq id=0x2
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <addr 2.2.2.2>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 3.3.3.3>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 4.4.4.4>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd IPV6CP ConfAck id=0x1
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <interface-identifier jjjj:jjjj:j:j>
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: IPV6CP opened
Nov/16/2025 19:23:28 pppoe,ppp,info isp: connected
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet  isp: rcvd IPCP ConfAck id=0x2
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <addr 2.2.2.2>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 3.3.3.3>
Nov/16/2025 19:23:28 pppoe,ppp,debug,packet     <ms-dns 4.4.4.4>
Nov/16/2025 19:23:28 pppoe,ppp,debug isp: IPCP opened
Nov/16/2025 19:23:49 pppoe,ppp,debug,packet  isp: rcvd LCP EchoReq id=0x1
Nov/16/2025 19:23:49 pppoe,ppp,debug,packet     <magic 0xf3dd7690>
Nov/16/2025 19:23:49 pppoe,ppp,debug,packet  isp: sent LCP EchoRep id=0x1
Nov/16/2025 19:23:49 pppoe,ppp,debug,packet     <magic 0x196a6d38>
Nov/16/2025 20:24:49 pppoe,ppp,debug,packet  isp: rcvd LCP EchoReq id=0x2
Nov/16/2025 20:24:49 pppoe,ppp,debug,packet     <magic 0xf3dd7690>
Nov/16/2025 20:24:49 pppoe,ppp,debug,packet  isp: sent LCP EchoRep id=0x2
Nov/16/2025 20:24:49 pppoe,ppp,debug,packet     <magic 0x196a6d38>
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: LCP closed
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: CCP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: BCP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: BCP down event in starting state
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: IPCP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: IPCP closed
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: IPV6CP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: IPV6CP closed
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: MPLSCP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: CCP close
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: BCP close
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: IPCP close
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: IPV6CP close
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: MPLSCP close
Nov/16/2025 20:25:01 pppoe,ppp,info isp: terminating... - hungup
Nov/16/2025 20:25:01 pppoe,debug,packet sfp1: sent PADT to GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:01 pppoe,debug,packet     session-id=0x932b
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:01 pppoe,ppp,debug isp: LCP down event in starting state
Nov/16/2025 20:25:01 pppoe,ppp,info isp: disconnected
Nov/16/2025 20:25:01 pppoe,ppp,info isp: initializing...
Nov/16/2025 20:25:02 pppoe,ppp,info isp: connecting...
Nov/16/2025 20:25:02 pppoe,debug,packet sfp1: sent PADI to FF:FF:FF:FF:FF:FF
Nov/16/2025 20:25:02 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:02 pppoe,debug,packet     host-uniq=0xac0003
Nov/16/2025 20:25:02 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:02 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: CCP close
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: BCP close
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: IPCP close
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: IPV6CP close
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: MPLSCP close
Nov/16/2025 20:25:02 pppoe,ppp,info isp: terminating...
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:02 pppoe,ppp,debug isp: LCP down event in starting state
Nov/16/2025 20:25:02 pppoe,ppp,info isp: disconnected
Nov/16/2025 20:25:02 pppoe,ppp,info isp: initializing...
Nov/16/2025 20:25:02 pppoe,ppp,info isp: connecting...
Nov/16/2025 20:25:06 pppoe,debug,packet sfp1: sent PADI to FF:FF:FF:FF:FF:FF
Nov/16/2025 20:25:06 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:06 pppoe,debug,packet     host-uniq=0xac0004
Nov/16/2025 20:25:06 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:06 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:06 pppoe,debug,packet sfp1: rcvd PADO from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:06 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:06 pppoe,debug,packet     host-uniq=0xac0004
Nov/16/2025 20:25:06 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:06 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:06 pppoe,debug,packet     ac-name=bras-region-01.core.myisp.net
Nov/16/2025 20:25:06 pppoe,debug,packet sfp1: sent PADR to GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:06 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:06 pppoe,debug,packet     host-uniq=0xac0005
Nov/16/2025 20:25:06 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:06 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:06 pppoe,debug,packet sfp1: rcvd PADS from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:06 pppoe,debug,packet     session-id=0x5657
Nov/16/2025 20:25:06 pppoe,debug,packet     host-uniq=0xac0005
Nov/16/2025 20:25:06 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:06 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:06 pppoe,ppp,debug isp: LCP lowerup
Nov/16/2025 20:25:06 pppoe,ppp,debug isp: LCP open
Nov/16/2025 20:25:06 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:06 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x5
Nov/16/2025 20:25:06 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:06 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:06 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x5
Nov/16/2025 20:25:06 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:06 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:07 pppoe,debug,packet sfp1: rcvd PADO from II:II:II:II:II:II
Nov/16/2025 20:25:07 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:07 pppoe,debug,packet     host-uniq=0xac0004
Nov/16/2025 20:25:07 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:07 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:07 pppoe,debug,packet     ac-name=bras-region-02.core.myisp.net
Nov/16/2025 20:25:07 pppoe,debug sfp1: received PADO with unknown host-uniq, dropping
Nov/16/2025 20:25:07 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:07 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x6
Nov/16/2025 20:25:07 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:07 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:07 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x6
Nov/16/2025 20:25:07 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:07 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:08 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:08 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x7
Nov/16/2025 20:25:08 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:08 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:08 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x7
Nov/16/2025 20:25:08 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:08 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x8
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x8
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <magic 0x78f8b0ca>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: rcvd LCP ConfReq id=0x2
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <magic 0xff031d99>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: sent LCP ConfAck id=0x2
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <magic 0xff031d99>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP opened
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: rcvd CHAP Challenge id=0x1
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet     <challenge len=16>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet     <name Huawei>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: sent CHAP Response id=0x1
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet     <response len=16>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet     <name redacted>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: rcvd CHAP Failure id=0x1
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet     Access number is exceed
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP close
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP closed
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: sent LCP TermReq id=0x9
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet     failed to authenticate ourselves to peer
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: CCP close
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: BCP close
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: IPCP close
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: IPV6CP close
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: MPLSCP close
Nov/16/2025 20:25:11 pppoe,ppp,info isp: terminating... - failed to authenticate ourselves to peer
Nov/16/2025 20:25:11 pppoe,debug,packet sfp1: sent PADT to GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:11 pppoe,debug,packet     session-id=0x5657
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP down event in initial state
Nov/16/2025 20:25:11 pppoe,ppp,info isp: disconnected
Nov/16/2025 20:25:11 pppoe,ppp,info isp: initializing...
Nov/16/2025 20:25:11 pppoe,ppp,info isp: connecting...
Nov/16/2025 20:25:11 pppoe,debug,packet sfp1: rcvd PADT from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:11 pppoe,debug,packet     session-id=0x5657
Nov/16/2025 20:25:11 pppoe,debug,packet sfp1: sent PADI to FF:FF:FF:FF:FF:FF
Nov/16/2025 20:25:11 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:11 pppoe,debug,packet     host-uniq=0xac0006
Nov/16/2025 20:25:11 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:11 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:11 pppoe,debug,packet sfp1: rcvd PADO from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:11 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:11 pppoe,debug,packet     host-uniq=0xac0006
Nov/16/2025 20:25:11 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:11 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:11 pppoe,debug,packet     ac-name=bras-region-01.core.myisp.net
Nov/16/2025 20:25:11 pppoe,debug,packet sfp1: sent PADR to GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:11 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:11 pppoe,debug,packet     host-uniq=0xac0007
Nov/16/2025 20:25:11 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:11 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:11 pppoe,debug,packet sfp1: rcvd PADS from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:11 pppoe,debug,packet     session-id=0xa8d7
Nov/16/2025 20:25:11 pppoe,debug,packet     host-uniq=0xac0007
Nov/16/2025 20:25:11 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:11 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP lowerup
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP open
Nov/16/2025 20:25:11 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0xa
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0xa
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:11 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:12 pppoe,debug,packet sfp1: rcvd PADO from II:II:II:II:II:II
Nov/16/2025 20:25:12 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:12 pppoe,debug,packet     host-uniq=0xac0006
Nov/16/2025 20:25:12 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:12 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:12 pppoe,debug,packet     ac-name=bras-region-02.core.myisp.net
Nov/16/2025 20:25:12 pppoe,debug sfp1: received PADO with unknown host-uniq, dropping
Nov/16/2025 20:25:12 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:12 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0xb
Nov/16/2025 20:25:12 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:12 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:12 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0xb
Nov/16/2025 20:25:12 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:12 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:14 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:14 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0xc
Nov/16/2025 20:25:14 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:14 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:14 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0xc
Nov/16/2025 20:25:14 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:14 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:16 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:16 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0xd
Nov/16/2025 20:25:16 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:16 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:16 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0xd
Nov/16/2025 20:25:16 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:16 pppoe,ppp,debug,packet    <magic 0x61ebe6c6>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: rcvd LCP ConfReq id=0x2
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <magic 0x4b4a64b4>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: sent LCP ConfAck id=0x2
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <magic 0x4b4a64b4>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP opened
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: rcvd CHAP Challenge id=0x1
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet     <challenge len=16>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet     <name Huawei>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: sent CHAP Response id=0x1
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet     <response len=16>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet     <name redacted>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: rcvd CHAP Failure id=0x1
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet     Access number is exceed
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP close
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP closed
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: sent LCP TermReq id=0xe
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet     failed to authenticate ourselves to peer
Nov/16/2025 20:25:17 pppoe,debug,packet sfp1: rcvd PADT from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:17 pppoe,debug,packet     session-id=0xa8d7
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: CCP close
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: BCP close
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: IPCP close
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: IPV6CP close
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: MPLSCP close
Nov/16/2025 20:25:17 pppoe,ppp,info isp: terminating... - failed to authenticate ourselves to peer
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP down event in initial state
Nov/16/2025 20:25:17 pppoe,ppp,info isp: disconnected
Nov/16/2025 20:25:17 pppoe,ppp,info isp: initializing...
Nov/16/2025 20:25:17 pppoe,ppp,info isp: connecting...
Nov/16/2025 20:25:17 pppoe,debug,packet sfp1: sent PADI to FF:FF:FF:FF:FF:FF
Nov/16/2025 20:25:17 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:17 pppoe,debug,packet     host-uniq=0xac0008
Nov/16/2025 20:25:17 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:17 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:17 pppoe,debug,packet sfp1: rcvd PADO from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:17 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:17 pppoe,debug,packet     host-uniq=0xac0008
Nov/16/2025 20:25:17 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:17 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:17 pppoe,debug,packet     ac-name=bras-region-01.core.myisp.net
Nov/16/2025 20:25:17 pppoe,debug,packet sfp1: sent PADR to GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:17 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:17 pppoe,debug,packet     host-uniq=0xac0009
Nov/16/2025 20:25:17 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:17 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:17 pppoe,debug,packet sfp1: rcvd PADS from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:17 pppoe,debug,packet     session-id=0xf6a8
Nov/16/2025 20:25:17 pppoe,debug,packet     host-uniq=0xac0009
Nov/16/2025 20:25:17 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:17 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP lowerup
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP open
Nov/16/2025 20:25:17 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0xf
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0xf
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:17 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:18 pppoe,debug,packet sfp1: rcvd PADO from II:II:II:II:II:II
Nov/16/2025 20:25:18 pppoe,debug,packet     session-id=0x0000
Nov/16/2025 20:25:18 pppoe,debug,packet     host-uniq=0xac0008
Nov/16/2025 20:25:18 pppoe,debug,packet     service-name=
Nov/16/2025 20:25:18 pppoe,debug,packet     ppp-max-payload=1492
Nov/16/2025 20:25:18 pppoe,debug,packet     ac-name=bras-region-02.core.myisp.net
Nov/16/2025 20:25:18 pppoe,debug sfp1: received PADO with unknown host-uniq, dropping
Nov/16/2025 20:25:18 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:18 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x10
Nov/16/2025 20:25:18 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:18 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:18 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x10
Nov/16/2025 20:25:18 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:18 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:19 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:19 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x11
Nov/16/2025 20:25:19 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:19 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:19 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x11
Nov/16/2025 20:25:19 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:19 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP timer
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: sent LCP ConfReq id=0x12
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: rcvd LCP ConfAck id=0x12
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <mru 1492>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <magic 0x12bed4db>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: rcvd LCP ConfReq id=0x2
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <magic 0x66f756af>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: sent LCP ConfAck id=0x2
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <mru 1508>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <magic 0x66f756af>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet    <auth  chap>
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP opened
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: rcvd CHAP Challenge id=0x1
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet     <challenge len=16>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet     <name Huawei>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: sent CHAP Response id=0x1
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet     <response len=16>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet     <name redacted>
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: rcvd CHAP Failure id=0x1
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet     Access number is exceed
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP close
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP closed
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet  isp: sent LCP TermReq id=0x13
Nov/16/2025 20:25:22 pppoe,ppp,debug,packet     failed to authenticate ourselves to peer
Nov/16/2025 20:25:22 pppoe,debug,packet sfp1: rcvd PADT from GG:GG:GG:GG:GG:GG
Nov/16/2025 20:25:22 pppoe,debug,packet     session-id=0xf6a8
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: CCP close
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: BCP close
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: IPCP close
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: IPV6CP close
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: MPLSCP close
Nov/16/2025 20:25:22 pppoe,ppp,info isp: terminating... - failed to authenticate ourselves to peer
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP lowerdown
Nov/16/2025 20:25:22 pppoe,ppp,debug isp: LCP down event in initial state
Nov/16/2025 20:25:22 pppoe,ppp,info isp: disconnected

It goes on like that until I disable the interface, but I had to cut that for the forum post length limit.

Don’t ask me why, but I’ve been having issues as well with the PPPoE client incorrectly seeting the MTU. In my case, it was due to the LCP that was being sent by Mikrotik was wrong according to RFC (I’ve found it in one forum thread, but I don’t remember where). It happened only in my RB5009 (not in hex S 2025 or CCR2004-PCIe), so my ISP incorrectly changed the MTU.

My solution was to disable keepalive-tiemout entirely: When the keepalive-tiemout is not set, no echo replies are sent. I see yours is disabled in both configs, try enabling it, perhaps it changes something.

Thanks for your answer ferferga!

I totally forgot to mention this in the "Things I've tried" section of my original post, but tried some things with both the MTU and the keepalive timeout.

  1. I manually set the max MTU to 1492 and 1400, and the issue persisted.
  2. I set the max MTU to 1000, and the issue went away. However, the upload then capped out at ~300 Mbit/s.
  3. Seeing that I removed the setting and limited the upload to 425 Mbit/s via a queue. The issue then went away, and this is why I wrote that specific number in the original post. The problem reappears when I raise the limit.
  4. I also experimented a bunch with the keepalive timeout. It didn't have any perceivable impact. Values I tried were 10, 20, 30, 60 (the ISP told me that this is their timeout) and 120.

I have managed to solve the issue. I understand less than I did before doing so. In the problematic configuration above and my original configuration (before step 2 of the things I tried) I deactivate all the physical ethernet ports that I don't need. This somehow causes the problem I had.

I'll mark this as solved now. However, if anyone knows how that happens, please let me know!