Re: BGP flapping

From: Tom Rogers (cccie71@yahoo.com)
Date: Tue Jun 22 2004 - 01:11:58 GMT-3


I guess ure seeing this also :-)

5d22h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to down

5d22h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up
Tom

ccie2be <ccie2be@nyc.rr.com> wrote:
Hi Guys,

This has been bothering me most of today. I just can't figure it out.

I'm doing a practice lab and R6 has 2 pppoATm connections to BB1. The configs
are shown below.

Aside from BGP, there aren't any other routing protocols running between R6
and BB1.

I tried using ( and not using) nei... ebgp multihop and the same for nei ...
update-source lo0.

Nothing seems to make any difference. The BGP session just keeps flapping up
and down.

Anyone know what's going on here? If so, please tell me what I should do to
correct this annoying problem.

Thanks kindly, Tim

interface ATM1/0
no ip address
no atm ilmi-keepalive
pvc 0/16 ilmi
!
!
interface ATM1/0.206 point-to-point
pvc 0/206
--More--
11:50:11: %BGP-5-ADJCHANGE: neighbor 54.6.8.254 Down Peer closed the session
broadcast
encapsulation aal5snap
protocol ppp Virtual-Template1
!
!
interface ATM1/0.306 point-to-point
pvc 0/306
encapsulation aal5snap
protocol ppp dialer
dialer pool-member 1
!

router bgp 100
no synchronization
bgp log-neighbor-changes
network 142.6.40.0 mask 255.255.248.0
neighbor 54.6.7.254 remote-as 54
neighbor 54.6.7.254 ebgp-multihop 255
neighbor 54.6.7.254 update-source Loopback0
neighbor 54.6.8.254 remote-as 54
neighbor 142.6.46.4 remote-as 45
neighbor 204.12.6.3 remote-as 200
neighbor 204.12.6.254 remote-as 54
no auto-summary

--More--
11:51:34: %BGP-5-ADJCHANGE: neighbor 54.6.7.254 Up
--More--
11:51:46: %BGP-5-ADJCHANGE: neighbor 54.6.8.254 Up
--More--



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