From: Ramesh Ramasamy (ramesh_ramasamy@xxxxxxxxxxx)
Date: Fri Apr 27 2001 - 16:35:49 GMT-3
Hi,
I did get this problem - if i recollect correctly, i had irb and bvi - but
kept the ip add only on the ethernet and not on the bvi. Also, was messing
the configs with 'no bridge 1 ip ..'
Have a second look at the ip addresses of the bridged interfaces - which are
to form the neighbors.
sorry not much of help..
Ramesh.
>From: "crl" <cisco@crl.fdns.net>
>Reply-To: "crl" <cisco@crl.fdns.net>
>To: "Groupstudy" <ccielab@groupstudy.com>
>Subject: Translational Bridging between Token Ring and Ethernet, IRB, and
>Various Routing Protocols
>Date: Fri, 27 Apr 2001 12:13:21 -0400
>
>Doing some experiments. Topology is:
>
>r4---token-ring---r3---ethernet---r2
>
>On r3, I'm doing SR/TLB and IRB. The Token Ring and Ethernet are a common,
>bridged subnet, and r3 has other interfaces that are routed (serials) but I
>don't think they're relvant to this discussion.
>
>Experimenting with various routing protocols on this network segment. I
>found that RIP1, RIP2, and IGRP work well in this situation. OSPF and EIGRP
>do not establish adjacencies. I have the bitswap-layer3-addresses command
>in
>place to allow ping, telnet etc to work well between all three routers.
>
>Take OSPF for example.
>r4#sh ip ospf nei
><no output>
>
>r3#sh ip ospf nei
>Neighbor ID Pri State Dead Time Address Interface
>197.7.77.1 1 INIT/DROTHER 00:00:35 197.7.8.4 BVI1
>197.7.8.10 1 FULL/DR 00:00:33 197.7.8.10 BVI1
>
>r2#sh ip ospf nei
>Neighbor ID Pri State Dead Time Address Interface
>197.7.77.1 1 INIT/DROTHER 00:00:39 197.7.8.4 Ethernet0
>197.7.8.3 1 FULL/BDR 00:00:31 197.7.8.3 Ethernet0
>
>Doesn't seem to make much sense. I suspected it was a multicast issue, but
>RIP2 works well. It's not an MTU problem, I checked that out - everything
>is
>set to 1500. I suspect the bitswap-layer3 command might be mangling EIGRP
>and/or OSPF, but not RIP and IGRP.
>
>Here's the relevant configs. I'd just like to know if this is impossible
>(great!) or if I'm missing something (doh!):
>
>
>r4#sh run
>!
> interface Loopback0
> ip address 197.7.77.1 255.255.255.0
> no ip directed-broadcast
>!
>interface TokenRing0
> mtu 1500
> ip address 197.7.6.4 255.255.255.0 secondary
> ip address 197.7.8.4 255.255.255.0
> no ip directed-broadcast
> ip nat outside
> ring-speed 16
>!
>router ospf 1
> network 197.7.0.0 0.0.255.255 area 0
>
>-------------------------------------------
>
>r3#sh run
>!
>bridge irb
>!
>interface Ethernet0
> no ip address
> no ip directed-broadcast
> bridge-group 1
>!
>interface Serial1
> ip address 197.7.7.3 255.255.255.0
> no ip directed-broadcast
>!
>interface TokenRing0
> mtu 1500
> no ip address
> no ip directed-broadcast
> ring-speed 16
> bridge-group 1
>!
>interface BVI1
> ip address 197.7.8.3 255.255.255.0
> no ip directed-broadcast
>!
>router ospf 1
> network 197.7.0.0 0.0.255.255 area 0
>!
>bridge 1 protocol ieee
>bridge 1 bitswap-layer3-addresses
> bridge 1 route ip
>
>-------------------------------------------
>
>r2#sh run
>!
> interface Ethernet0
> ip address 197.7.8.10 255.255.255.0
>!
>!
>router ospf 1
> network 197.7.0.0 0.0.255.255 area 0
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