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snovak7
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Topic Author
Posts: 2
Joined: Thu Aug 11, 2011 4:58 pm
Location: Ljubljana, Slovenia

OSPF on EoIP not working

Thu Aug 11, 2011 5:36 pm

My 2 routers RB750 can't talk to each other over eoip with OSPF. They are ping-able within 172.16.0.4/30 network.
# aug/11/2011 16:28:33 by RouterOS 5.6
# software id = V1RA-I9P2
#
/routing ospf instance
set default disabled=no distribute-default=never in-filter=ospf-in \
    metric-bgp=auto 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=as-type-1 \
    redistribute-other-ospf=no redistribute-rip=no redistribute-static=\
    as-type-1 router-id=172.17.0.1
/routing ospf area
set backbone area-id=0.0.0.0 disabled=no instance=default name=backbone type=\
    default
/routing ospf interface
add authentication=none authentication-key="" authentication-key-id=1 \
    comment="Static interface" cost=10 dead-interval=40s disabled=no \
    hello-interval=10s instance-id=0 interface=BR.GW-MS-2 network-type=\
    point-to-point passive=no priority=1 retransmit-interval=5s \
    transmit-delay=1s use-bfd=no
/routing ospf network
add area=backbone disabled=no network=172.16.0.4/30
# aug/11/2011 16:33:48 by RouterOS 5.6
# software id = VMZ1-FWZX
#
/routing ospf instance
set default disabled=no distribute-default=never in-filter=ospf-in \
    metric-bgp=auto 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=as-type-1 \
    redistribute-other-ospf=no redistribute-rip=no redistribute-static=\
    as-type-1 router-id=172.16.0.2
/routing ospf area
set backbone area-id=0.0.0.0 disabled=no instance=default name=backbone type=\
    default
/routing ospf interface
add authentication=none authentication-key="" authentication-key-id=1 \
    comment="static interface" cost=10 dead-interval=40s disabled=no \
    hello-interval=10s instance-id=1 interface=BR.GW-MS-1 network-type=\
    point-to-point passive=yes priority=1 retransmit-interval=5s \
    transmit-delay=1s use-bfd=no
/routing ospf network
add area=backbone disabled=no network=10.0.1.0/24
add area=backbone disabled=no network=172.16.0.4/30
This is current state of configuration after changing it long enough. Any help would be appreciated.

Thank you!
 
spoiler
newbie
Posts: 27
Joined: Thu Mar 02, 2006 6:29 pm

Re: OSPF on EoIP not working

Fri Aug 12, 2011 10:15 am

If you enable ospf logging maybe you get the answer...

/system logging add topics=ospf action=memory

Maybe you have MTU related issues.
 
snovak7
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Topic Author
Posts: 2
Joined: Thu Aug 11, 2011 4:58 pm
Location: Ljubljana, Slovenia

Re: OSPF on EoIP not working

Fri Aug 12, 2011 2:11 pm

There doesn't seem to indicate any errors:
12:44:04 route,ospf,debug SEND: Hello 172.16.0.5 -> 224.0.0.5 on BR.GW-MS-2
12:44:04 route,ospf,debug,raw PACKET: 
12:44:04 route,ospf,debug,raw     02 01 00 2C AC 11 00 01 00 00 00 00 4F 90 00 00 
12:44:04 route,ospf,debug,raw     00 00 00 00 00 00 00 00 FF FF FF FC 00 0A 02 01 
12:44:04 route,ospf,debug,raw     00 00 00 28 00 00 00 00 00 00 00 00 
Both sides do this most of the time... that all what's in the logs. for communication of ospf.

...

I lowered the MTU to 1280, and it seems they're communicating now...

Any recommended value for MTU for OSPF on EoIP ??
 
mprokopov
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Posts: 2
Joined: Wed Apr 17, 2013 10:18 am

Re: OSPF on EoIP not working

Fri Aug 05, 2016 1:54 pm

I my case unchecking "Use BFD" for EoIP interface in OSFP fixed flapping issue.

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