Hi Richard
You're right, 2960C's are L2 only; and my understanding is the same in that they shouldn't be doing CEF at all.
That said they're a similar hardware flavour to 2960S/3560X/3750X hardware, which can have L3 features enabled, so the software release in use probably has CEF code riddled right the way thru it.
What happens when you attempt to run CEF related commands on the CLI, e.g. - show cef background - show platform ip unicast cef-idb
e.g. are they available, do they return anything, does the CPU spike with the CLI commands too?
The other obvious questions: 1) Which IOS version are you running? 2) Is it the latest stable/recommended release?
-Colin
On 29 January 2015 at 22:47, Richard Kuhns rjk@wintek.com wrote:
Attached! If the list server doesn't like it, I'll resend with it inline.
On 01/28/15 16:17, Mike Stupalov wrote:
Hi Richard,
plese send me debug poller for this device with enabled module cef: ./poller.php -d -m cisco-cef -h <cisco_2960>
On Wed, Jan 28, 2015 at 11:52 PM, Richard Kuhns <rjk@wintek.com mailto:rjk@wintek.com> wrote:
Hi all, This is just on the order of a 'watch out' notice. We're currently on 0.15.1.6206, but had the same issue with earlier versions and with the CE. We have 5 Cisco 2960Cs that we monitor, and all were taking horrible amounts of time to poll. Always at least 200 seconds, and often over 300. After some experiment, we discovered that they apparently don't careto
talk about CEF (Cisco Express Forwarding). If Observium asks themabout
it, the CPU usage climbs above 60% and stays there for quite a while. If I go to the device --> edit --> Modules and disable cicso-cef, everything is fine. The CPU drops under 5%, and the poll time is 5 seconds or less. I'm pretty sure we're not losing any useful info, since I don'tbelieve
the 2960Cs support CEF in the first place. As I said, this is just a heads up. Observium is a great tool. Thanks! -- Richard Kuhns <rjk@wintek.com <mailto:rjk@wintek.com>> Main Number: 765-742-8428 Wintek Corporation Direct: 765-269-8541 427 N 6th Street Internet Support: 765-269-8503 Lafayette, IN 47901-2211 Consulting: 765-269-8504 _______________________________________________ observium mailing list observium@observium.org <mailto:observium@observium.org> http://postman.memetic.org/cgi-bin/mailman/listinfo/observium-- Mike Stupalov http://observium.org/
-- Richard Kuhns rjk@wintek.com Main Number: 765-742-8428 Wintek Corporation Direct: 765-269-8541 427 N 6th Street Internet Support: 765-269-8503 Lafayette, IN 47901-2211 Consulting: 765-269-8504
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium