BGP won't advertise loopback net

CriscoSystems · ‎02-21-2008

Getting back up on the horse toward passing BSCI, I've dusted off my lab routers and I want very simply for BGP to start advertising a loop back network from Router Chris to Router Brian. (On Family Guy I guess those two don't interact much but I don't think that's the culprit here.)

Brian's config:

!

router bgp 360

neighbor 201.1.1.2 remote-as 790

!

Brian's sh ip bgp summary:

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

201.1.1.2 4 790 18 18 1 0 0 00:15:14 0

Chris's config:

!

router bgp 790

network 25.1.1.1

network 25.1.1.1 mask 255.255.255.0

neighbor 201.1.1.1 remote-as 360

!

Chris's sh ip bgp summary:

BGP router identifier 25.1.1.1, local AS number 790

BGP table version is 47, main routing table version 47

1 network entries and 0 paths using 89 bytes of memory

BGP activity 1/0 prefixes, 23/23 paths

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

201.1.1.1 4 360 19 19 47 0 0 00:16:36 0

Chris#

So the two have neighborship in the ESTABLISHED state, but network 25.1.1.1/24; active on Chris's Loopback0 interface, doesn't show up at all in Brian's routing table. I've configured it manually in router config mode, so what have I neglected to do here?

wlsj · ‎02-21-2008

delete the fire network statement

Richard Burts · ‎02-21-2008

To the original poster: I am having difficulty in treating your question as having merit given the ID that you have adopted. I suggest that you start over and choose an ID that suggests that you have respect for these forums.

There is inconsistency in what you have configured and I believe that this is causing the pproblem. You have configured:

network 25.1.1.1 mask 255.255.255.0

however the address suggests a mask of /32 and the mask suggests that the fourth octet should be 0. It is hard to know what to change without seeing what is configured on the loopback, but I believe that you need to either change the address or change the mask.

HTH

Rick

HTH

Rick