My Mikrotik HAP AX3 does not get IP from my Modem - stuck on searching

RouterOS Beginner Basics
1

Hi all, thanks for the help. Sorry if this sounds silly but I’m quite new with Mikrotik.

For context, I am using Vodafone Germany (in Hessen) as my ISP and they provide internet via DOCSIS 3.1 cable. Until recently, I had a Fritzbox that worked “just fine” but now I am using a Technicolor TC4400 Modem and a Mikrotik HAP AX3 as my router.

According to Vodafone (I’m not a L1 German speaker), the Modem is getting an IP from them - I’m sitting behind CGNAT. I also do not need PPPoE or VLAN tagging for my ISP to provide an IP address.

I can see that, when I connect my laptop directly via ethernet to my modem I get a public IP address, but no Internet connection.

However, the Mikrotik DHCP client never gets the IP address from them. It gets stuck on “searching…”

Here is the configuration. Can someone please help me out? Thanks a lot!!

# 1970-01-02 01:25:50 by RouterOS 7.12.2
# software id = CVQ5-N4MQ
#
# model = C53UiG+5HPaxD2HPaxD
# serial number = <removed>
/interface bridge
add admin-mac=D4:01:C3:5D:A5:8C auto-mac=no comment=defconf name=bridge
/interface ethernet
set [ find default-name=ether1 ] mac-address=D4:24:DD:30:93:D5
/interface wifiwave2
set [ find default-name=wifi1 ] channel.skip-dfs-channels=10min-cac \
    configuration.mode=ap .ssid=MikroTik-5DA590 disabled=no \
    security.authentication-types=wpa2-psk,wpa3-psk
set [ find default-name=wifi2 ] channel.skip-dfs-channels=10min-cac \
    configuration.mode=ap .ssid=MikroTik-5DA591 disabled=no \
    security.authentication-types=wpa2-psk,wpa3-psk
/interface list
add comment=defconf name=WAN
add comment=defconf name=LAN
/ip pool
add name=default-dhcp ranges=192.168.88.10-192.168.88.254
/ip dhcp-server
add address-pool=default-dhcp interface=bridge lease-time=10m name=defconf
/interface bridge port
add bridge=bridge comment=defconf interface=ether2
add bridge=bridge comment=defconf interface=ether3
add bridge=bridge comment=defconf interface=ether4
add bridge=bridge comment=defconf interface=ether5
add bridge=bridge comment=defconf interface=wifi1
add bridge=bridge comment=defconf interface=wifi2
/ip neighbor discovery-settings
set discover-interface-list=LAN
/interface list member
add comment=defconf interface=bridge list=LAN
add comment=defconf interface=ether1 list=WAN
/ip address
add address=192.168.88.1/24 comment=defconf interface=bridge network=\
    192.168.88.0
/ip dhcp-client
add comment=defconf interface=ether1
/ip dhcp-server network
add address=192.168.88.0/24 comment=defconf dns-server=192.168.88.1 gateway=\
    192.168.88.1
/ip dns
set allow-remote-requests=yes
/ip dns static
add address=192.168.88.1 comment=defconf name=router.lan
/ip firewall filter
add action=accept chain=input comment=\
    "defconf: accept established,related,untracked" connection-state=\
    established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=\
    invalid
add action=accept chain=input comment="defconf: accept ICMP" protocol=icmp
add action=accept chain=input comment=\
    "defconf: accept to local loopback (for CAPsMAN)" dst-address=127.0.0.1
add action=drop chain=input comment="defconf: drop all not coming from LAN" \
    in-interface-list=!LAN
add action=accept chain=forward comment="defconf: accept in ipsec policy" \
    ipsec-policy=in,ipsec
add action=accept chain=forward comment="defconf: accept out ipsec policy" \
    ipsec-policy=out,ipsec
add action=fasttrack-connection chain=forward comment="defconf: fasttrack" \
    connection-state=established,related hw-offload=yes
add action=accept chain=forward comment=\
    "defconf: accept established,related, untracked" connection-state=\
    established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid" \
    connection-state=invalid
add action=drop chain=forward comment=\
    "defconf: drop all from WAN not DSTNATed" connection-nat-state=!dstnat \
    connection-state=new in-interface-list=WAN
/ip firewall nat
add action=masquerade chain=srcnat comment="defconf: masquerade" ipsec-policy=\
    out,none out-interface-list=WAN
/ipv6 firewall address-list
add address=::/128 comment="defconf: unspecified address" list=bad_ipv6
add address=::1/128 comment="defconf: lo" list=bad_ipv6
add address=fec0::/10 comment="defconf: site-local" list=bad_ipv6
add address=::ffff:0.0.0.0/96 comment="defconf: ipv4-mapped" list=bad_ipv6
add address=::/96 comment="defconf: ipv4 compat" list=bad_ipv6
add address=100::/64 comment="defconf: discard only " list=bad_ipv6
add address=2001:db8::/32 comment="defconf: documentation" list=bad_ipv6
add address=2001:10::/28 comment="defconf: ORCHID" list=bad_ipv6
add address=3ffe::/16 comment="defconf: 6bone" list=bad_ipv6
/ipv6 firewall filter
add action=accept chain=input comment=\
    "defconf: accept established,related,untracked" connection-state=\
    established,related,untracked
add action=drop chain=input comment="defconf: drop invalid" connection-state=\
    invalid
add action=accept chain=input comment="defconf: accept ICMPv6" protocol=icmpv6
add action=accept chain=input comment="defconf: accept UDP traceroute" port=\
    33434-33534 protocol=udp
add action=accept chain=input comment=\
    "defconf: accept DHCPv6-Client prefix delegation." dst-port=546 protocol=\
    udp src-address=fe80::/10
add action=accept chain=input comment="defconf: accept IKE" dst-port=500,4500 \
    protocol=udp
add action=accept chain=input comment="defconf: accept ipsec AH" protocol=\
    ipsec-ah
add action=accept chain=input comment="defconf: accept ipsec ESP" protocol=\
    ipsec-esp
add action=accept chain=input comment=\
    "defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec
add action=drop chain=input comment=\
    "defconf: drop everything else not coming from LAN" in-interface-list=!LAN
add action=accept chain=forward comment=\
    "defconf: accept established,related,untracked" connection-state=\
    established,related,untracked
add action=drop chain=forward comment="defconf: drop invalid" \
    connection-state=invalid
add action=drop chain=forward comment=\
    "defconf: drop packets with bad src ipv6" src-address-list=bad_ipv6
add action=drop chain=forward comment=\
    "defconf: drop packets with bad dst ipv6" dst-address-list=bad_ipv6
add action=drop chain=forward comment="defconf: rfc4890 drop hop-limit=1" \
    hop-limit=equal:1 protocol=icmpv6
add action=accept chain=forward comment="defconf: accept ICMPv6" protocol=\
    icmpv6
add action=accept chain=forward comment="defconf: accept HIP" protocol=139
add action=accept chain=forward comment="defconf: accept IKE" dst-port=\
    500,4500 protocol=udp
add action=accept chain=forward comment="defconf: accept ipsec AH" protocol=\
    ipsec-ah
add action=accept chain=forward comment="defconf: accept ipsec ESP" protocol=\
    ipsec-esp
add action=accept chain=forward comment=\
    "defconf: accept all that matches ipsec policy" ipsec-policy=in,ipsec
add action=drop chain=forward comment=\
    "defconf: drop everything else not coming from LAN" in-interface-list=!LAN
/system note
set show-at-login=no
/tool mac-server
set allowed-interface-list=LAN
/tool mac-server mac-winbox
set allowed-interface-list=LAN
2

Only thing I see is that you set a MAC address…where did it come from? Is it necessary? What if you remove it?

When I used to have a docsis modem, it was necessary to turn it off and after a few minutes turn it on again to get an IP address. Did you give that procedure a chance yet?

3

I tried to remove the MAC Address but it does not do anything. It does just reset the value to the default one. I tried to set the MAC as the default one, the one from my modem and the one from my previous router, as well as a randomly generated one, none worked.

I tried to power cycle both modem and routers and I get the same problem.

If I try to plug my laptop directly to the modem with an ethernet cable I see that I get a public IP address, but I still don't have internet.

Edit: I should add as well that I don't see anything relevant in the logs. Hence the lack of them.

4

Not sure about your ISP, but every time Ive replaced a DOCSIS modem I’ve needed to contact the ISP and notify them. They typically filter by MAC address or something and need to reset the filter to match the modem.

5

Concur, most likely the internet access is locked to the mac address of the old modem vice the new modem OR locked to the old mac address of the fritz box…
Cable is usually straightforward, and normally from my experience provides a public IP to the router not private, but probably regionally specific.