[c-nsp] two bgp sesion on one router

harbor235 harbor235 at gmail.com
Tue Aug 23 08:40:38 EDT 2011


Depends, if the two ISP peers were located at two different POPs and your
layer one connectivity
was diverse this would help your AS in more failure scenarios than a single
threaded design. Of course
I would also diversify the connections onto different linecards/slots as
well.

Mike



On Tue, Aug 23, 2011 at 7:58 AM, Robert Raszuk <robert at raszuk.net> wrote:

> Hi zaidoon,
>
> Nope - I would not recommend that.
>
> Your better choice is to peer between loopbacks and use
> disable-connected-check knob or BGP multihop.
>
> Two sessions will cause you to get the same paths two times wasting a
> bit of control plane memory and CPU inbound processing - but that's
> about it. On the peer's side update generation would be the same as your
> peer would only copy at replication. But better is to have single
> session IMHO.
>
> Cheers,
> R.
>
> > Is it  recommended to terminate
> >  two bgp session on 12000 xr that  peering with the same isp on the same
> router how
> > to handle full routing table ? Any clues
> >
> > Zaid
> >
> >
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