urgent BGP flapping help

Unanswered Question
Aug 13th, 2008

Guys we have a WAN connection to a site.....the router installed at Customer is cisco 2850 which has a VPN (at other end)with check point firewall.....so the router at cutomer end is having a vpn connection with check point and at same time having a BGP with a routers (two routers as its redundant) behind that check point firewall......now we have noticed that BGP goes down and comes up few times at night and some time at day time......we have checked WAN link router configs everything but nothing is unusual.......what can be the possible issue.....kindly see the attached doc and advise me as i m going nuts as a support eng :-)

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lamav Wed, 08/13/2008 - 17:07

Do you have a digram? Your description seems convoluted.

Also, post the configs.

What are your BGP timers set to on both ends? A Notification is being sent closing the BGP session, usually as a result of lost keepalives.

VL

The_guroo_2 Wed, 08/13/2008 - 17:28

There are no timers set.......its pretty simple cutomer end router is conected with two routers at core via 8mbps link via bgp as the core has security the router at customer end has a VPN connection to the firewall which sits before the core bgp routers.....and i know that its misisng keepalives and that is the reason i have posted that , that why its doing like that as there are no BGP timers (which means its set to default)

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