[c-nsp] Stranges with BGP

[Alexey Luckyanchikov]

On Mon, 13 Dec 2004, Ben Crocker wrote:

BC> There's been more than one bug to do with this but perhaps this one 
BC> applies,

BC> CSCdr54230 : BGP:attribute length truncated + command to limit AS_PATH 
BC> size
BC> 
BC> Hope it helps,

Thank you, but I can't find in this bug any confirmation that 12.2S are
affected.

BC> On Dec 13, 2004, at 12:29 PM, Alexey Luckyanchikov wrote:
BC> 
BC> >Hi.
BC> >
BC> >Today I observed strange flapping between two 7513. Log from one side
BC> >(software version - 12.2(14)S9):
BC> >Dec 10 23:05:24: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Up
BC> >Dec 13 11:39:59: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Down BGP 
BC> >Notification sent
BC> >Dec 13 11:39:59: %BGP-3-NOTIFICATION: sent to neighbor 195.248.160.210 
BC> >1/2 (illegal header length) 0 bytes
BC> >Dec 13 11:40:29: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Up
BC> >Dec 13 11:40:29: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Down BGP 
BC> >Notification sent
BC> >Dec 13 11:40:29: %BGP-3-NOTIFICATION: sent to neighbor 195.248.160.210 
BC> >3/1 (update malformed) 31 bytes CA1A5B12 83000000 00D456E5 B1D45646 F5
BC> >Dec 13 11:40:29: BGP: 195.248.160.210 Bad attributes FFFF FFFF FFFF 
BC> >FFFF FFFF FFFF FFFF FFFF 0073 0200 0000 4540 0101 0240 0204 0201 21F2 
BC> >4003 04C3 F8BF 9680 0404 0000 0000 4005 0400 0000 5AC0 0804 EC17 BDBA 
BC> >CA1A 5B12 8300 0000 00D4 56E5 B1D4 5646 F5D4 56
BC> >Dec 13 11:40:55: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Up
BC> >Dec 13 11:43:56: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Down BGP 
BC> >Notification sent
BC> >Dec 13 11:43:56: %BGP-3-NOTIFICATION: sent to neighbor 195.248.160.210 
BC> >4/0 (hold time expired) 0 bytes
BC> >Dec 13 11:44:24: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Up
BC> >Dec 13 12:08:05: %BGP-5-ADJCHANGE: neighbor 195.248.160.210 Down BGP 
BC> >Notification sent
BC> >Dec 13 12:08:05: %BGP-3-NOTIFICATION: sent to neighbor 195.248.160.210 
BC> >1/2 (illegal header length) 0 bytes
BC> >
BC> >And from another (software version - 12.2(14)S10):
BC> >Dec 13 11:39:59: %BGP-3-NOTIFICATION: received from neighbor 
BC> >195.248.160.167 1/2 (illegal header length) 0 bytes
BC> >Dec 13 11:39:59: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Down BGP 
BC> >Notification received
BC> >Dec 13 11:40:29: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Up
BC> >Dec 13 11:40:29: %BGP-3-NOTIFICATION: received from neighbor 
BC> >195.248.160.167 3/1 (update malformed) 31 bytes CA1A5B12 83000000 
BC> >00D456E5 B1D45646 F5
BC> >Dec 13 11:40:29: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Down BGP 
BC> >Notification received
BC> >Dec 13 11:40:55: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Up
BC> >Dec 13 11:43:56: %BGP-3-NOTIFICATION: received from neighbor 
BC> >195.248.160.167 4/0 (hold time expired) 0 bytes
BC> >Dec 13 11:43:56: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Down BGP 
BC> >Notification received
BC> >Dec 13 11:44:24: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Up
BC> >Dec 13 12:08:05: %BGP-3-NOTIFICATION: received from neighbor 
BC> >195.248.160.167 1/2 (illegal header length) 0 bytes
BC> >Dec 13 12:08:05: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Down BGP 
BC> >Notification received
BC> >Dec 13 12:08:35: %BGP-5-ADJCHANGE: neighbor 195.248.160.167 Up
BC> >
BC> >Manual session reset help - flapping stopped. I can't find any
BC> >appropriate to this issue in Bug Navigator. Do you have any ideas about
BC> >what it was?

-- 
Sincerely,
Alexey Luckyanchikov