[c-nsp] Sup720 - FIB full, software switching

[Adam Vitkovsky]

> Is there a way to avoid those issues by let it just ignoring routes not 
> matching into the FIB? 

Hi Rolf,
Unfortunately the only option is to reset the bgp neighbor after the number
of received routes crosses a certain threshold. 
neighbor x.x.x.x maximum-prefix 10000 75 restart 5

But still better than having the whole box stuck in process switching.

adam

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
"Rolf Hanßen"
Sent: Monday, February 03, 2014 3:09 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Sup720 - FIB full, software switching

Hi,

today I saw 2x Sup720-3B (default 192K IPv4 routes) that received a full
table.
After FIB was filled IOS gave a warning that it now may forward in software
(and resetted all BGP sessions because of memory issues). I don't have the
exact messages.

The real problem occured after that. I shut the full table BGP session and
cleared the others, the system now had a few routes only again.

But it started to drop packets, I saw no pattern, it looked nearly random.
I needed to reboot both boxes to resolve that issue.

IOS was s72033-advipservicesk9_wan-mz.122-33.SXJ.bin

Is there a way to avoid those issues by let it just ignoring routes not
matching into the FIB?
Is there a command to reset the routing mode/routes back to CEF without
reloading the box?

kind regards
Rolf

_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/