I'm having issues with OSPF (Mikrotik) traversing an Airmax sector.
Network consists of a Routerboard running 4.1, connected to a Rocket
sector running XM.v5.1. Client radio is a Nanostation also running
XM.v5.1, connected to a Routerboard running 4.2. The first routerboard
has a number of ospf neighbors on the same interface the Rocket is
connected to (there is a switch between the physical interface and the
Rocket) but when a neighbor relationship is established over the UBNT
link, strange things happen. Running a traceroute to the loopback
address of the MT results in a routing loop, with the Nanostation
showing up as a L3 hop. I have yet to do a packet dump, but my guess
is that somehow the UBNT radio is mangling the OSPF multicast traffic
and inserting itself in to the path. The notes on the UBNT forum
regarding OSPF seem to indicate that enabling multicast forwarding on
the radio is all that is required. See below for the MT OSPF config.
/routing ospf instance
set default comment="" disabled=no distribute-default=never
in-filter=ospf-in metric-bgp=20 metric-connected=20 metric-default=1
metric-other-ospf=\
auto metric-rip=20 metric-static=20 name=default
out-filter=ospf-out redistribute-bgp=no redistribute-connected=no
redistribute-other-ospf=no \
redistribute-rip=no redistribute-static=no router-id=10.254.12.3
/routing ospf area
set backbone area-id=0.0.0.0 comment="" disabled=no instance=default
name=backbone type=default
add area-id=0.0.0.1 comment="" disabled=no instance=default name=1 type=default
/routing ospf interface
add authentication=md5 authentication-key=secret
authentication-key-id=1 comment="" cost=10 dead-interval=40s
disabled=no hello-interval=10s \
instance-id=0 interface=wlan1 network-type=broadcast passive=no
priority=1 retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=secret
authentication-key-id=1 comment="" cost=10 dead-interval=40s
disabled=no hello-interval=10s \
instance-id=0 interface=ether1 network-type=broadcast passive=no
priority=1 retransmit-interval=5s transmit-delay=1s
/routing ospf network
add area=1 comment="" disabled=no network=10.0.0.0/8
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