From: Johnny Dedon (johnny.dedon@xxxxxxxxxx)
Date: Mon Aug 27 2001 - 13:02:45 GMT-3
Guys,
Here is a pretty interesing problem.
I am trying to figure out a way to use BVIs to route and bridge at the same
time over a single interface.
The scenario is:
host1 \ / host3
RtrA---serial----RtrB - host4 SINGLE
ethernet off of both bridges
host2 / \ host5
Currently flat network.
Host 1 and host 2 are address from the network 192.168.1.0
Host 3, host4, and host5 are on 192.168.1.0, 10.0.3.0 and 10.0.4.0
respectively
Now what I want to do is readdress all host off of RtrA with new address range
while still supporting existing addresses during transititon. (all host are
hard coded)
Note. Currently routing is being done by NT with multiple nics off of RtrB.
I want to replace the NT with RtrB so that RtrB routes between all networks
andt also bridges over serial and etheret.
I tried using just bridging on RtrA and using IRB on RtrB and enabling ip
routing on the bridge. I then point all host off RtrA to a gateway address
configured on the BVI on RtrB. This does not seem to work. RtrB can ping
everyone, but is not routing for them.
I configured Eigrp as the routing protocol on RtrB only.
By the way, I configured all networks on single BVI using secondary parameter
I then configure IRB on RtrA add ip routing on the bridge here too and add the
same networks to it's BVI. I point RtrA's host to the gateway address
configured on RtrA BVI and RtrB's host to gateway configured on RtrB's BVI.
All bridges accross network on same bridge group. I get full reachability.
I quess my question is how come it will not work with only bridging on RtrA
(no IRB) with IRB on RtrB?
I just thought I understood IRB
Johnny Dedon
Senior Staff Consultant
Exodus Professional Services
johnny.dedon@exodus.net
www.exodus.net
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