[c-nsp] Safe to enable CEF on live 3725 production router?

[Ge Moua]

CEF bugs aren't as common as they used to be.  But you never know, but
overall I would say this is a safe operation to undertake.


:-)
Regards,
Ge Moua | Email: moua0100 at umn.edu

Network Design Engineer
University of Minnesota | Networking & Telecommunications Services
2218 University Ave SE | Minneapolis, MN 55414-3029
Office: 612.626.2779 | Pager: 612.###.#### | Fax: 612.626.1818

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Rodney Dunn
Sent: Tuesday, August 01, 2006 2:50 PM
To: Nassess, George
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Safe to enable CEF on live 3725 production router?

For the most part yes assuming you hit some random bug.

What does 'sh int stat' say for the interfaces?

If it's showing process switching that is a problem.
If it's route cache (fast switching) it's probably pretty unlikely
turning on CEF will fix it although it should still be done.

Rodney

On Tue, Aug 01, 2006 at 02:14:17PM -0500, Nassess, George wrote:
> Troubleshooting a strange problem, can ping customer's managed router
> ATM WAN interface, with no loss. When pinging across the router to its
> ethernet interface, we see occasional packet loss and delay. Not enough
> to affect data, but enough to affect voice quality of H323 trunks that
> delivers calls to their remote call center. I noticed their 3725 WAN
> router does not have CEF enabled. We are feeling the pressure, and I
> wanted to enable CEF as a troubleshooting step, but am not sure of the
> impact on traffic in a live production router. Is it safe to do this
> mid-day? 
>  
> Gus Nasses
> george.nassess at gmacrfc.com
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