[c-nsp] BGP flapping session

[Chris Lane]

We are an ISP and have many customer neighbor sessions on our router. One of
my customers BGP sessions started flapping yesterday. The bridge we have to
them has no errors or disconnects. So i debugged the bgp session and
recieved the following. Also to note the customer router is a Juniper.

FYI: i removed the IPs.

ay 24 20:20:29.715: BGP: timer-wheel running slow by 1 ticks

May 24 20:20:35.780: BGP:  remote close

May 24 20:20:35.780: BGP:  -reset the session

May 24 20:20:35.780: BGP:  rcv message type 3, length (excl. header) 2

May 24 20:20:35.780: BGPNSF state:  went from nsf_not_active to
nsf_not_active

May 24 20:20:35.780: BGP:  went from Established to Idle

May 24 20:20:35.780: %BGP-5-ADJCHANGE: neighbor  Down Peer closed the
session

May 24 20:20:35.780: BGP:  closing

May 24 20:20:35.780: BGP:  read request no-op

May 24 20:20:39.530: BGP:  read request no-op

May 24 20:21:01.676: BGP:  read request no-op

May 24 20:21:10.878: BGP:  went from Idle to Active

May 24 20:21:10.878: BGP:  open active delayed 28655ms (35000ms max, 28%
jitter)

May 24 20:21:13.831: BGP:  passive open to 64.119.159.185

May 24 20:21:13.831: BGP:  went from Active to Idle

May 24 20:21:13.839: BGP:  went from Idle to Connect

May 24 20:21:13.839: BGP:  read request no-op

May 24 20:21:13.839: BGP:  rcv message type 1, length (excl. header) 36

May 24 20:21:13.839: BGP:  rcv OPEN, version 4, holdtime 90 seconds

May 24 20:21:13.839: BGP:  went from Connect to OpenSent

May 24 20:21:13.839: BGP:  sending OPEN, version 4, my as: 19406, holdtime
180 seconds

May 24 20:21:13.839: BGP:  rcv OPEN w/ OPTION parameter len: 26

May 24 20:21:13.839: BGP:  rcvd OPEN w/ optional parameter type 2
(Capability) len 6

May 24 20:21:13.839: BGP:  OPEN has CAPABILITY code: 1, length 4

May 24 20:21:13.839: BGP:  OPEN has MP_EXT CAP for afi/safi: 1/1

May 24 20:21:13.839: BGP:  rcvd OPEN w/ optional parameter type 2
(Capability) len 2

May 24 20:21:13.839: BGP:  OPEN has CAPABILITY code: 128, length 0

May 24 20:21:13.848: BGP:  OPEN has ROUTE-REFRESH capability(old) for all
address-families

May 24 20:21:13.848: BGP:  rcvd OPEN w/ optional parameter type 2
(Capability) len 2

May 24 20:21:13.848: BGP:  OPEN has CAPABILITY code: 2, length 0

May 24 20:21:13.848: BGP:  OPEN has ROUTE-REFRESH capability(new) for all
address-families

May 24 20:21:13.848: BGP:  rcvd OPEN w/ optional parameter type 2
(Capability) len 8

May 24 20:21:13.848: BGP:  OPEN has CAPABILITY code: 64, length 6

BGP:  rcvd OPEN w/ remote AS 46324

May 24 20:21:13.848: BGP:  went from OpenSent to OpenConfirm

May 24 20:21:13.848: BGP:  send message type 1, length (incl. header) 45

May 24 20:21:13.890: BGP:  went from OpenConfirm to Established

May 24 20:21:13.890: %BGP-5-ADJCHANGE: neighbor  Up

May 24 20:21:15.089: BGP_Router: unhandled major event code 128, minor 0



Any help would greatly be appreciated.

Chris

-- 
//CL