North American Network Operators Group
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Re: What Worked - What Didn't

  • From: Mike Lewinski
  • Date: Mon Sep 17 18:16:10 2001 
> Are you aware of any "downside" to implementing this command ?

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


> ----- Original Message -----
> From: "Mike Lewinski" <[email protected]>
> To: <[email protected]>
> Sent: Monday, September 17, 2001 3:38 PM
> Subject: Re: What Worked - What Didn't
>
>
> >
> > > But speaking of BGP: what concerns me is the very long timeouts.
When
> > a
> > > 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
traffic.
> >
> > This IOS command should remedy that under most circumstances:
> >
> > bgp fast-external-fallover
> >
> >
> > Mike
> >
>
>