One of our upstream providers flapped this morning, and since then they are sending corrupted BPG data. I'm running 12.4(22)T on cisco 7200s. I'm getting no BGP errors from that providers and the number of routes and basic sanity check looks okay. However, when it tries to redistribute the bgp routes via iBGP to our other board routers, we get: 003372: Feb 24 09:17:13.963 EST: %BGP-5-ADJCHANGE: neighbor x.x.x.x Down BGP Notification sent 003373: Feb 24 09:17:13.963 EST: %BGP-3-NOTIFICATION: sent to neighbor x.x.x.x 1/2 (illegal header length) 2 bytes All routes have identical hardware and IOS versions. My google and cisco search fu leads me to the AS path length bug, but the interesting thing is that since we have "bgp maxas-limit 75" configured and a recent IOS, we haven't had the problem before when other people were reporting issues. I've also looked at the path mtu issue, and although we haven't had a problem before I disabled bgp mtu path discovery, but have the same issues. Anyone seeing something like this today, and or does anyone have a suggestion on finding out more specific info (which as path for example so I can filter it)? ---- Matthew Huff | One Manhattanville Rd OTA Management LLC | Purchase, NY 10577 http://www.ox.com | Phone: 914-460-4039 aim: matthewbhuff | Fax: 914-460-4139