From: Nathan Chessin (nchessin@cisco.com)
Date: Tue Nov 05 2002 - 02:50:08 GMT-3
Hi All,
I am having some trouble with irb. I don't really understand when a router
will bridge and route a packet. I feel like this is something that should
be obvious. For instance, when you have:
R1
int s0/2
ip add 10.1.1.1 255.255.255.0
R1#sh int irb
Serial0/2
Routed protocols on Serial0/2:
ip
Bridged protocols on Serial0/2:
appletalk clns decnet ip
vines apollo ipx xns
and on the other end I only have an ip address 10.1.1.3/24, why can't I ping
from interface to interface? Yet when I type:
R1(config)#no bridge 1 bridge ip
I am able to ping.
Does the router try to bridge by default? When do I want/need ip addresses
on a bridged interface? Do I only use bridge 1 route ip with a BVI? I know
this is the entire concept of irb, but I am getting confused and I don't
have any decent docs.
Thanks,
Nate
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