[c-nsp] The show cmd that crash any router with full routing table

[Kim Onnel]

It appears that : (from cisco)

It was reported by a number of customers and it
has not yet been solved. The bug applies to all IOS-based boxes.


CSCsb08386
Externally found catastrophic defect: Open (O)
PRP crash by show ip bgp regexp

Symptom:
PRP crashed with show ip regexp command

Conditions:
BGP is being updated.

Workaround - 12k/PRP running 12.0(28)S2:
This crash is not seen with the command "bgp regex deterministic"
configured, available in 12.3(4)T, 12.0(26)S and 12.2(22)S and later.

Workaround for T train - C7200VXR running: 12.3(11)T6:
Configure "bgp regexp deterministic" under BGP process.

Workaround for SX train - C6500 running: 12.2(18)SXD5:
None since "bgp regexp deterministic" is not a valid command in SX
train.


The workaround uses a new deteministic regex engine. The drawback is
that this engine is much slower the the "classic" one. I can see that
they are just testing a throttle release of 12.0 to fix the problem.
I have no idea how quickly it will be integrated into other releases.




On 9/12/05, David Prall <dcp at dcptech.com> wrote:
> 
> Configure "bgp regexp deterministic" within the router bgp and this wil go 
> away. Simple regex's take a little longer, but the complicated ones will run 
> correctly.
> 
> 
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s26/s_rexpe.htm
> 
> --
> David C Prall dcp at dcptech.com http://dcp.dcptech.com
> 
> 
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net
> > [mailto:cisco-nsp-bounces at puck.nether.net<cisco-nsp-bounces at puck.nether.net>] 
> On Behalf Of Kim Onnel
> > Sent: Monday, September 12, 2005 4:36 AM
> > To: Cisco-NSP Mailing List
> > Subject: [c-nsp] The show cmd that crash any router with full
> > routing table
> >
> > Hello,
> >
> > Our Sup720 crashed when we issued a complex Regex on it, the
> > same for some
> > route-servers (tiscali, AT&T,..), is this normal ?
> >
> > I won't put it here, but i'd welcome cisco engineers private
> > emails to fix
> > it, is this a known issue ?
> >
> > Regards
> > _______________________________________________
> > 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/
> > 
>