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urbanserj
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Joined: Sun Oct 24, 2021 2:34 am

7.1rc4 and non-functional dhcp on vlan

Mon Oct 25, 2021 10:41 am

Hi folks,

I'd like to have a few vlans on hAP AC³ with 7.1rc4 (wifiwave2 is a requirement in my case), but hit an issue with a non-working dhcp server on vlan. Wireless clients send dhcp requests, but sniffer shows no response from the dhcp server. Ethernet clients continue working just fine.

WAN: ether1
mgmt bridge: ether2 and wifi4 (172.16.0.0/24)
main bridge: ether[345], wifi[123] (192.168.0.0/24, vlan20)

I started with a single vlan 20 on the main bridge and ran dhcp server on this vlan. I checked the firewall rules, they don't drop any internal traffic. Please see my pretty basic configuration below. Thanks.


# oct/24/2021 23:58:17 by RouterOS 7.1rc4
/interface bridge
add admin-mac=2C:C8:1B:A5:AC:72 auto-mac=no fast-forward=no name=bridge protocol-mode=none vlan-filtering=yes
add name=mgmt protocol-mode=none
/interface ethernet
set [ find default-name=ether1 ] comment=WAN mac-address=24:F5:A2:AD:58:92
set [ find default-name=ether2 ] comment=mgmt
set [ find default-name=ether5 ] comment=manul.local poe-out=off
/interface wifiwave2
set [ find default-name=wifi1 ] channel.skip-dfs-channels=10min-cac comment=2.4GHz configuration.country="United States3" .mode=ap .ssid=meow \
    disabled=no security.authentication-types=wpa2-psk,wpa3-psk .wps=disable
set [ find default-name=wifi2 ] channel.skip-dfs-channels=10min-cac comment=5GHz configuration.country="United States3" .mode=ap .ssid=meow disabled=no \
    security.authentication-types=wpa2-psk,wpa3-psk .wps=disable
add configuration.country="United States3" .mode=ap .ssid=roar disabled=no mac-address=2E:C8:1B:A5:AC:76 master-interface=wifi1 \
    name=wifi3 security.authentication-types=wpa2-psk,wpa3-psk .wps=disable
add configuration.country="United States3" .mode=ap .ssid=mgmt disabled=no mac-address=2E:C8:1B:A5:AC:77 master-interface=wifi1 \
    name=wifi4 security.authentication-types=wpa2-psk,wpa3-psk .wps=disable
/interface vlan
add comment="Main vlan" interface=bridge name=vlan20 vlan-id=20
/interface list
add name=WAN
add name=LAN
add name=MGMT
/ip pool
add name=main ranges=192.168.0.10-192.168.0.99
add name=mgmt ranges=172.16.0.2-172.16.0.4
/ip dhcp-server
add address-pool=main disabled=yes interface=bridge lease-time=5m name=bridge
add address-pool=mgmt interface=mgmt lease-time=5m name=mgmt
add address-pool=main interface=vlan20 lease-time=5m name=main
/interface bridge port
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged 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
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=wifi1 pvid=20
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=wifi2 pvid=20
add bridge=bridge frame-types=admit-only-untagged-and-priority-tagged interface=wifi3 pvid=20
add bridge=mgmt interface=ether2
add bridge=mgmt interface=wifi4
/ip neighbor discovery-settings
set discover-interface-list=LAN
/interface bridge vlan
add bridge=bridge tagged=bridge untagged=ether3,ether4,ether5,wifi1,wifi2,wifi3 vlan-ids=20
/interface l2tp-server server
set authentication=mschap2 max-mru=1384 max-mtu=1384 use-ipsec=required
/interface list member
add interface=bridge list=LAN
add interface=ether1 list=WAN
add interface=mgmt list=MGMT
add interface=vlan20 list=LAN
/ip address
add address=192.168.0.1/24 comment=Bridge disabled=yes interface=bridge network=192.168.0.0
add address=172.16.0.1/24 comment=Mgmt interface=mgmt network=172.16.0.0
add address=192.168.0.1/24 comment=main interface=vlan20 network=192.168.0.0
/ip dhcp-client
add comment=defconf interface=ether1
/ip dhcp-server lease
add address=192.168.0.2 mac-address=DC:A6:32:BC:9C:84 server=bridge
add address=192.168.0.3 mac-address=A0:43:B0:72:3A:30 server=bridge
/ip dhcp-server network
add address=172.16.0.0/24 dns-none=yes gateway=0.0.0.0 netmask=24
add address=192.168.0.0/24 dns-server=192.168.0.2 gateway=192.168.0.1
/ip dns
set allow-remote-requests=yes servers=192.168.0.2
/ip dns static
add address=192.168.0.1 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 log=yes
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=accept chain=input comment="MGMT Port" dst-address=172.16.0.0/24 in-interface-list=MGMT src-address=172.16.0.0/24
add action=drop chain=input comment="Drop non-mgmt traffic to mgmt network" dst-address=172.16.0.0/24 in-interface-list=!MGMT
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 log=yes out-interface-list=WAN
add action=dst-nat chain=dstnat comment="WireGuard on manul.local" dst-port=51820 protocol=udp to-addresses=192.168.0.2 to-ports=51820
/ip upnp
set enabled=yes
/ip upnp interfaces
add interface=bridge type=internal
add interface=ether1 type=external
/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 clock
set time-zone-name=America/Los_Angeles
/system leds settings
set all-leds-off=after-1h
/system logging
add topics=wireless
/system package update
set channel=development
/system resource irq
set 2 cpu=1
set 3 cpu=2
/system routerboard settings
set cpu-frequency=auto
/tool mac-server
set allowed-interface-list=MGMT
/tool mac-server mac-winbox
set allowed-interface-list=MGMT
 
urbanserj
just joined
Topic Author
Posts: 2
Joined: Sun Oct 24, 2021 2:34 am

Re: 7.1rc4 and non-functional dhcp on vlan

Tue Oct 26, 2021 11:10 am

I tested same configuration, but on stable version 6.49 with the old wifi stack. DHCP server on vlan20 worked fine, though the old wifi stack showed poor performance (tens mbit/s within 3 feet vs. half of gigabit with wifiwave2 within 50 feet which was the reason of upgrading to the development version). I also tested routeros 7.1rc4 with the old wireless stack, it works as well. It seems like wifiwave2 causes the issue.
Last edited by urbanserj on Wed Oct 27, 2021 7:06 am, edited 1 time in total.

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