[c-nsp] BGP Reestablish-"order"

[Artyom Viklenko]

21.10.2010 3:52, Mario Iseli пишет:
> Hi there,
>
> I have the problem that the CPU on my router is going mad when my link to an
> IX gets up again after an interface flap, the router reestablishes all
> sessions in the same time and then kinda gets in a loop because he begins to
> drop BGP packets after being so busy processing BGP updates. :-)

If your interface flaps sometimes for a short period, you can protect your router
with "no bgp fast-external-fallover" command in router bgp section. Also there is
per-interface command "[no] ip bgp fast-external-fallover".
This is not what you ask exactly, but may be helpful in some conditions.

At least BGP speaker will not drop all directly connected peers in case of interface flap.
Hope this help a bit.

>
> Is there a way to define the order how those sessions come up again or that I
> can specify a "reestablish timer" for each neighbor, so that I can let the
> "less important" peers to wait for a specific amount of time before trying to
> get the session back?
>
> I'm looking forward to see if anyone of you had the same experiences and how
> you solved this situation.
>
> Thank you for your inputs and best regards,
> Mario
>
> ---
> Mario Iseli
> Network Engineer
>
> Finecom Telecommunications AG
> Internet&  Communication
> Robert-Walser-Platz 7
> CH-2501 Biel/Bienne
>
> Phone  +41 (0)32 559 99 99
> Fax    +41 (0)32 559 99 90
> Email  mario.iseli at finecom.ch
> Web    http://www.finecom.ch
> ---
>
>
>
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-- 
            Sincerely yours,
                             Artyom Viklenko.
-------------------------------------------------------
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