[c-nsp] Forcing BGP to propagate only after route is in the FIB

Youssef Bengelloun-Zahr youssef at 720.fr
Thu Sep 15 10:47:28 EDT 2016


One is never too precautious I guess ;-)

Y.



> Le 15 sept. 2016 à 14:15, Gert Doering <gert at greenie.muc.de> a écrit :
> 
> Hi,
> 
>> On Thu, Sep 15, 2016 at 03:08:18PM +0300, Saku Ytti wrote:
>> I don't think so. This is issue which has plagued Juniper RPD for years.
>> 
>> Technically I believe fix would be to add flag to FIB entries
>> signalling HW presence. Then when HW installs it, it should raise
>> interrupt or such, to get this flag inserted. But it might be that HW
>> does not support this (At any reasonable performance).
> 
> IOS XR has "update wait-install", which supposedly does this: only forward
> updates when they've been successfully installed into the forwarding 
> hardware.
> 
> (Supposedly this is only needed on gen1 line cards, because gen2 "are fast
> enough", but it still sounded like a good idea to me :-) )
> 
> gert
> -- 
> USENET is *not* the non-clickable part of WWW!
>                                                           //www.muc.de/~gert/
> Gert Doering - Munich, Germany                             gert at greenie.muc.de
> fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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