[f-nsp] BGP Session stuck in IDLE state

[Sam Stickland]

Appologies. I found the problem after doing a 'debug ip bgp events':

Jan  5 16:19:06 BGP: x.y.z.w Peer went to IDLE state (TCP Connection Closed by Remote)
Jan  5 16:19:06 BGP: x.y.z.w BGP connection closed
Jan  5 16:19:06 BGP: x.y.z.w remote peer closed TCP connection
Jan  5 16:19:06 BGP: x.y.z.w TCP Connection opened
Jan  5 16:19:06 BGP: x.y.z.w Active TCP Connection is Open, local IP a.b.c.d
Jan  5 16:19:06 BGP: x.y.z.w Init TCP Connection to peer, local IP a.b.c.d

Would appear that the remote peer was closing the session as our router 
attempted to open it, so probably just a simple instance of the session 
not being enabled/configured at their end. *blush*

Odd that 'sh ip bgp sum | inc xxxx' never showed anything other than the 
IDLE state. Don't Foundry's usually display ACTIV for a period of time 
(ala cisco's).

Sam

On Wed, 5 Jan 2005, Stephen J. Wilcox wrote:

> sh mem ?
>
> Steve
>
> On Wed, 5 Jan 2005, Sam Stickland wrote:
>
>> Hiya Mike,
>>
>> On Wed, 5 Jan 2005, Mike Hughes wrote:
>>
>>> --On 05 January 2005 15:53 +0000 Sam Stickland <sam_ml at spacething.org>
>>> wrote:
>>>
>>>> I've just added it's 49th and 50th BGP sessions to it, but they remain
>>>> stuck in the IDLE stack. If I do a 'clear ip bgp nei x.y.z.w' then the
>>>> state briefly changes to IDLE* and then back to IDLE.
>>>>
>>>> The neighbor configuration is identical to the other working sessions,
>>>> and the next-hop is reachable and directly connected.
>>>>
>>>> It has 283MB of RAM free, and there isn't anything unusual in the logs.
>>>>
>>>> As I recall when I recently added it's 48th BGP session it stayed in the
>>>> IDLE state for 5 minutes before establishing.
>>>>
>>>> Has anyone got any suggestions as to what's wrong?
>>>
>>> Any idea what the neighbour is?
>>> Anything interesting or odd in the logs on the neighbour device?
>>
>> I've asked the peer for this information. In the meantime a quick MAC
>> address check shows it's a cisco.
>>
>>> Foundry used to have an insanely aggressive BGP scanner. Maybe they have
>>> toned it down a bit, and in doing so, gone ultra conservative?
>>
>> Perhaps, but there wasn't any problems with the first 47 BGP sessions -
>> they all established correctly.
>>
>> I tried shutting down an iBGP session I could afford to lose. It didn't
>> make any difference to the two stuck IDLE sessions, and it came back up
>> again almost straight away when I brought it back.
>>
>> So that does suggest that it's a problem specific to these neighbours.
>>
>> (Just to clarify, when I save it's stuck in the IDLE state, it never moves
>> into the ACTV or CONN states).
>>
>>
>> Sam
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>
>