RE: BGP failing to establish a peer. Any ideas?

Hi Dave,

Take a look at the "Subcodes for BGP Cease Notification Messages" RFC -->
http://www.ietf.org/rfc/rfc4486.txt

Although looking at your debug it looks to be that a subcode of '0' is
returned? This sub-code is not documented in the RFC unless I am missing
something.

Does the other box support BGPv4? I would check that the blade switch
conforms to the BGPv4 RFC.

It looks like you have TCP connectivity as the session transitions to
OpenConfirm. Possible MTU issues? Can you establish other TCP connections to
the blade switch?

Can you sniff the link? You might see more information in a packet dump.

Cheers,

-Aaron.

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Dave
Serra
Sent: Saturday, 6 August 2011 10:03 AM
To: ccielab_at_groupstudy.com
Subject: OT: BGP failing to establish a peer. Any ideas?

Hey Guys,
 
I am running into an issue with bringing up a partner who is using
a "blade networks" switch and I am using a Cisco 4900M. Debugs show that
the
session is moving from idle to active and then to Open and finally to
OpenConfirm before closing. So I don't think this is a layer 3 check ttl
(update source, TTL, etc...) though I could be wrong. From looking at the
debug below, can anyone tell what is happening? I've looked at RFC 1105 but
it says nothing about the "cease 0" message I am getting in the debug.
 
I
tried setting the timers to defaul (60 keepalive - 180 hold down) and
removing
soft-reconfiguration inbound but no luck. And I did clear the bgp neighbor
with the "clear ip bgp 10.255.0.10" command after each change
 
Below is the
config and debug. Any help is MUCH appreciated!
 
router bgp 1
  neighbor
10.255.0.10 remote-as 2
  neighbor 10.255.0.10 timers 3 9
  neighbor
10.255.0.10 soft-reconfiguration inbound
 
Aug 5 21:48:09.873: BGP:
10.255.0.10 went from Idle to Active
Aug 5 21:48:09.873: BGP: 10.255.0.10
open active, local address 10.255.0.9
Aug 5 21:48:09.873: BGP: 10.255.0.10
read request no-op
Aug 5 21:48:09.873: BGPNSF: Building graceful restart
capability for 10.255.0.10
Aug 5 21:48:09.873: BGP: 10.255.0.10 went from
Active to OpenSent
Aug 5 21:48:09.873: BGP: 10.255.0.10 sending OPEN,
version 4, my as: 1, holdtime 9 seconds
Aug 5 21:48:09.873: BGP: 10.255.0.10
send message type 1, length (incl. header) 55
Aug 5 21:48:09.873: BGP:
10.255.0.10 rcv message type 1, length (excl. header) 10
Aug 5 21:48:09.873:
BGP: 10.255.0.10 rcv OPEN, version 4, holdtime 180 seconds
Aug 5
21:48:09.873: BGP: 10.255.0.10 rcv OPEN w/ OPTION parameter len: 0
BGP:
10.255.0.10 rcvd OPEN w/ remote AS 2
Aug 5 21:48:09.873: BGP: 10.255.0.10
went from OpenSent to OpenConfirm
Aug 5 21:48:09.873: BGP: 10.255.0.10 rcv
message type 3, length (excl. header) 2
Aug 5 21:48:09.873:
%BGP-3-NOTIFICATION: received from neighbor 10.255.0.10 6/0 (cease) 0 bytes
Aug 5 21:48:09.873: BGP: 10.255.0.10 went from OpenConfirm to Closing
Aug 5
21:48:09.873: BGPNSF state: 10.255.0.10 went from nsf_not_active to
nsf_not_active
Aug 5 21:48:09.873: BGP: 10.255.0.10 went from Closing to
Idle
Aug 5 21:48:09.873: BGP: 10.255.0.10 closing

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Received on Sat Aug 06 2011 - 10:33:51 ART