Re: Default Route NOT received - why?

Reminds me of a default-route bug I ran into awhile ago, although it was on
a 6500. The debug Roy suggested is a good way to test. Also, do you have a
way to capture the traffic to see if the update is valid?

On Tue, Jul 7, 2009 at 3:23 PM, Roy Waterman <roy.waterman_at_gmail.com> wrote:

> Hi Alex
>
> Not that this is of any help, but I've replicated your config, & was able
> to
> receive the deault route fine on the CE... :s
>
> Have you run a debug ip bgp update on both PE & CE?
>
> On PE check for: BGP(0): 200.0.0.29 enqueued default-originate update
>
> On CE check for:
>
> BGP(0): 200.0.0.30 rcvd UPDATE w/ attr: nexthop 200.0.0.30, origin i,
> metric
> 0, path 6100
> BGP(0): 200.0.0.30 rcvd 0.0.0.0/0
>
> --
>
> In addition can you originate ANY other network on the PE end of things &
> see if the CE receives it fine.
>
> Regards
> Roy
>
> 2009/7/7 Alexandre Oliveira <busa_at_uol.com.br>
>
> > Fellows,
> >
> > I have a problem here where my BGP session sends default route to CE but
> he
> > doesn't receive it. The topology is as follows:
> >
> > PE1-(.30)------(.29)-CE
> >
> > PE1 have a BGP session against direct connected interface, IP address
> > 200.0.0.29/30:
> > [PE]
> > router bgp 6100
> > neighbor 200.0.0.29 remote-as 64990
> > neighbor 200.0.0.29 local-as 6100 no-prepend
> > neighbor 200.0.0.29 ebgp-multihop 5
> > neighbor 200.0.0.29 password cisco
> > neighbor 200.0.0.29 update-source Vlan25
> > neighbor 200.0.0.29 version 4
> >
> > add ipv4
> > neighbor 200.0.0.29 activate
> > neighbor 200.0.0.29 send-community
> > neighbor 200.0.0.29 default-originate
> > neighbor 200.0.0.29 remove-private-as
> > neighbor 200.0.0.29 soft-reconfiguration inbound
> > neighbor 200.0.0.29 maximum-prefix 2000 90 restart 5
> >
> > [CE]
> > router bgp 64990
> > no synchronization
> > bgp router-id 200.189.254.2
> > bgp log-neighbor-changes
> > network x.x.x.x
> > network y.y.y.y
> > neighbor 200.0.0.30 remote-as 6100
> > neighbor 200.0.0.30 password cisco
> > neighbor 200.0.0.30 ebgp-multihop 2
> > neighbor 200.0.0.30 update-source FastEthernet0/1
> > neighbor 200.0.0.30 send-community
> > neighbor 200.0.0.30 soft-reconfiguration inbound
> > no auto-summary
> >
> > I see at PE's side all routes for X and Y networks. I also see the result
> > of
> > sent routes:
> > ---
> > Originating default network 0.0.0.0
> >
> > Network Next Hop Metric LocPrf Weight Path
> >
> > Total number of prefixes 0
> > ---
> >
> > However, Customer (CE) doesn't receive this route (0.0.0.0).
> > Clear, reconfiguration, restart and so one was tried before.
> >
> >
> > Any ideas?? Could be a IOS bug?
> >
> > Thanks!
> >
> > Alexandre Oliveira
> > CCIE# 24499 (Service Provider)
> >
> >
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>
>
> --
> Regards
> Roy
>
>
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-- 
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
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