[BGP] header synchronization problems

Hi all,

It's forming a BGP peer, however, it appear BGP flapping with the following
massage.

*Jun 27 14:05:02.219: %BGP-3-NOTIFICATION: received from neighbor 10.10.7.7
1/1 (header synchronization problems) 0 bytes
*Jun 27 14:05:02.223: %BGP-5-ADJCHANGE: neighbor 10.10.7.7 Down BGP
Notification received
*Jun 27 14:05:23.503: %BGP-5-ADJCHANGE: neighbor 10.10.7.7 Up
The configuraiton just like this :

R6
=========
router bgp 267
 bgp router-id 10.10.6.6
 no bgp default ipv4-unicast
 bgp log-neighbor-changes
 neighbor 10.10.7.7 remote-as 267
 neighbor 10.10.7.7 update-source Loopback0
  !
 address-family ipv4
  neighbor 10.10.7.7 activate
  neighbor 10.10.7.7 send-community both
  neighbor 10.10.7.7 route-reflector-client
  neighbor 10.10.7.7 next-hop-self
  no auto-summary
  no synchronization
 exit-address-family
!

R7
=========
router bgp 267
 bgp router-id 10.10.7.7
 no bgp default ipv4-unicast
 bgp log-neighbor-changes
 neighbor 10.10.6.6 remote-as 267
 neighbor 10.10.6.6 update-source Loopback0
 !
 address-family ipv4
  neighbor 10.10.6.6 activate
  neighbor 10.10.6.6 send-community both
  neighbor 10.10.6.6 next-hop-self
  no auto-summary
  no synchronization
 exit-address-family
it make me crazy that it is a normal connection..
Please kinldy to help if you have any finding.

Thanks,
Jerry

Blogs and organic groups at http://www.ccie.net
Received on Sat Jun 27 2009 - 14:46:14 ART