Are you aware of any "downside" to implementing this command ?

----- Original Message ----- From: "Mike Lewinski" <mike@rockynet.com> To: <nanog@merit.edu> Sent: Monday, September 17, 2001 3:38 PM Subject: Re: What Worked - What Didn't

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But speaking of BGP: what concerns me is the very long timeouts.

When

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a

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BGP router loses power, it takes minutes for the peer on the other side of the connection to notice something is wrong and reroute the

I opted against using it on our network, after considering the consequences of having an eBGP link go down for a few seconds repeatedly (which has actually happened here twice in my memory). Under this circumstance the fast-external-fallover would probably have caused our routes to be dampened. Other than that, I think it's probably a bonus that a single very brief failure on an eBGP link doesn't require the tables to be reset. Mike traffic.

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This IOS command should remedy that under most circumstances:

bgp fast-external-fallover

Mike