[c-nsp] Faster BGP Failover

[Keegan Holley]

2011/10/11 Vincent Aniello <vincent.aniello at pipelinefinancial.com>

> > Can you be a bit more specific about the config?
>
> We have two routers, the first router has two Internet connections, ISP A
> and ISP B.  The second router has a backup connection to ISP A.  All three
> connections take a full BGP routing table and the two routers peer with each
> other via iBGP.  The connections to the ISPs are Ethernet.  We recently had
> a failure of ISP B and the Ethernet interface stayed up, but the BGP peer
> went down, which is what prompted this question.
>

Do you know how fast this needs to be? The best answer is probably to just
shorten your timers.  Providers aren't running BFD with customers as far as
I know.  You should be able to set them to 10/30 , or 5/20.  BGP timers are
negotiated to the lowest value so even if your carrier doesn't like it they
won't be able to stop you.  This will also save you the trouble of opening a
ticket or requesting that this be done.


> > This is presumably an eBGP session across a local interface?
>
> Correct.
>
> > What platform & IOS version?
>
> 7206 routers running the 12.4T IOS train.
>
> Thanks.
>
> --Vincent
>
>
>
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