[j-nsp] Problems with EX4200

Richard A Steenbegen ras at e-gerbil.net
Thu Nov 18 23:11:41 EST 2010

On Thu, Nov 18, 2010 at 10:19:14PM -0200, Giuliano Cardozo Medalha wrote:
> People,
> We have here one EX4200 running BGP and virtual routers.
> It is logging to me the following error.
> J-TAC said this is a software error.

The PREFIX ADD failure messages mean the route didn't get added to the 
FIB, most likely because you exhausted the capacity on the box (EX4200's 
only do around 12k ipv4 unicast routes in hw). Later on when a withdraw 
comes along that removes the route, you get the PREFIX DELETE failures 
because the route never got added in the first place, and thus can't be 
found to remove it. 

It's a pretty nasty way to log it, as it's unclear to users, floods the 
logs with lots of junk messages, and it doesn't even tell you which 
prefix couldn't be added. They could probably do it a better way, but 
hey at least it doesn't disable CEF and force every packet to be process 
switched like Cisco does when you fill the FIB. :)

Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)

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