[c-nsp] BGP hold time problem

[Bruce Pinsky]

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Matthew Simpson wrote:
> 
>> Matthew Simpson wrote:
>>> I'm having a problem with a BGP session with level3.  It has dropped
>>> twice in the last week now with a hold time expired message.  The
>>> port stays up and the BGP session comes back 5 minutes later.
>>
>> Directly connected peer?  What type of media is the interface over which
>> the session is established?
>>
> 
> Single mode fiber, and yes, directly connected.

Could be unidirectional errors causing packet loss at the Level3 router.
Also could be load on their router.  Since their router is generating the
notification and tearing down the session, a call to their NOC asking why
it is happening is a good place to start.

Also check the stats in "sh ip bgp sum" or "sh ip bgp nei" for retransmits
as a sign of potential packet loss toward/at their router:

Datagrams (max data segment is 1440 bytes):
Rcvd: 6821664 (out of order: 0), with data: 3928262, total data bytes: 74637207
Sent: 7024220 (retransmit: 28666 fastretransmit: 0),with data: 3839407,
total data bytes: 73203578

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bep

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