Setup:
have MX4300 DumbAP on nss build. it is connected to a mikrotik switch which in turn is trunked to a mikrotik router.
MX4300DumbAP(s)->MikrotikSwitch-(trunk port)->MikrotikRouter
it is vlan enabled with about 5 vlans.
there is mDNS reflector capability turned on in Mikrotik router(ip->dns->include vlans) between 3 vlans(including vlan 20 and 30).
Issue: Mikrotik router complains like below:
Switch_to_router_trunk_port: bridge RX looped packet - MAC d4:ce:12:44:33:22(mikrotik router bridge mac) -> 23:34:44:56:b4:32(device on vlan30 mac) VID 20 ETHERTYPE 0x0800 IP TCP 10.10.20.22:58342 -> 10.10.30.33:55595
when i have devices connected to vlan 20 and vlan30 on any mx4300 AP.
Note:
also have a unifi AP in the mix(connected to switch) and this issue does not arise for devices connected to vlan20 and vlan30 on unifiAP.
Observations:
a) cannot reproduce issue when devices connected across multiple MX4300 DumbAP (vlan20 device on a mx4300 and vlan30 device on another mx4300)
b) seem to be an issue within a single mx4300 device and wireless devices connected on different vlans.
question:
a) is the repetition of mac address for wan.20(vlan device) wan.30, bridge.20(bridge device),bridge.30 causing this issue (enabled stp/igmp snooping on all bridges in mx4300)? have tried making them unique. still issue remains. what are next steps to find root cause?