routing/filter (ROS 4.10/4.11)

RouterOS Forwarding Protocols
1

Is an bug with routing-filters (with ospf) well-known?

I have on gate2 a outgoing-filter (example):

gate2:
/routing/filter pr
0 chain=ospf-out prefix=192.168.0.0/16 invert-match=no action=accept
1 chain=ospf-out prefix=10.17.3.0/24 invert-match=no action=accept
2 chain=ospf-out prefix=0.0.0.0/0 invert-match=no action=accept
3 chain=ospf-out invert-match=no action=discard


/routing/ospf/instance pr
gate2: (routing-filter - see above, static default route/fixed )
name=“lan1” router-id=0.0.0.100 distribute-default=if-installed-as-type-1 redistribute-connected=as-type-1
redistribute-static=as-type-2 redistribute-rip=no redistribute-bgp=no redistribute-other-ospf=no
metric-default=10 metric-connected=1 metric-static=200 metric-rip=20 metric-bgp=auto metric-other-ospf=10
in-filter=ospf-in out-filter=ospf-out

gate3 (no routing-filter)
name=“lan1” router-id=2.0.0.1 distribute-default=if-installed-as-type-1
redistribute-connected=as-type-1 redistribute-static=as-type-2 redistribute-rip=no
redistribute-bgp=no redistribute-other-ospf=no metric-default=1 metric-connected=20
metric-static=20 metric-rip=20 metric-bgp=10 metric-other-ospf=10 in-filter=ospf-in
out-filter=ospf-out

Failure:

  • 192.168.77.x, 192.168.40.x do not accept (without filters its ok!) ; 10.17.3.0.x is ok!
  • gate3: default route lose after 3-6h (other ospf-routes are stable!)


    Test-HW:
    gate2: RB450G, gate3: RB750G, direct connected via LAN

S.

2

Only external routes can be filtered in routing filters. If intra/inter-area routes are filtered then it breaks whole OSPF.

3

The internal net 192.168.20.0/24 (intra-area) is registered in the routing/filter. But the filter does not function outgoing-routes; for example 192.168.77.0/24 (insert outgoing-filter: 192.168.0.0/16) is blocked; the default route (OSPF) on gate3 (import from gate2) lose after 3-6h…

L.