Hi,
On 03.02.2015 11:41, Karsten Schwarz wrote:
Hi Mike,
disabling CEF is the worst thing to do on a cisco switch. The Problem is just type error in the polling script.
The polled OID name is _not_ CISCO-CEF-MIB::cefFIBSummaryEntry! It is CISCO-CEF-MIB::CefFIBSummaryEntry
The Mib lists the the description as :cefFIBSummaryEntry, but the value name is CISCO-CEF-MIB::CefFIBSummaryEntry
You are sure that know this better than me? ;)
CefFIBSummaryEntry is syntax description for cefFIBSummaryEntry.
regards
*Karsten Schwarz*/ Plateau des Systèmes d'Information Infrastructure/
Centre Hospitalier du Nord 120, avenue Salentiny L-9080 Ettelbruck
+352 8166-63418 karsten.schwarz@chdn.lu http://www.chdn.lu http://www.chdn.lu/
From: Mike Stupalov mike@observium.org To: Observium Network Observation System observium@observium.org Date: 29.01.2015 20:39 Subject: Re: [Observium] An interesting issue with Cisco 2960Cs... Sent by: "observium" observium-bounces@observium.org
Try latest revision (r6218). For my test device (WS-C2960C-8PC-L) polling time reduced from 124.78s -> to 17.52s (without disabling any module) :)
On Thu, Jan 29, 2015 at 7:14 PM, Richard Kuhns <_rjk@wintek.com_ mailto:rjk@wintek.com> wrote: Hi Colin,
On 01/29/15 08:19, Colin Stubbs wrote:
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
This command isn't available.
- show platform ip unicast cef-idb
This command returns immediately with no output.
e.g. are they available, do they return anything, does the CPU spike with the CLI commands too?
Nope, no CPU spike.
The other obvious questions:
- Which IOS version are you running?
We've now tested on 12.2(55)EX, 15.0(2)SE7, and 15.2(1)E3. All have the same problem. I can use snmpbulkwalk to query CISCO-CEF-MIB::cefFIBSummaryEntry and the SNMP ENGINE process CPU use jumps to over 80%, and stays there for 20 to 50 seconds.
- Is it the latest stable/recommended release?
15.0(2)SE7 is.
-Colin
Hopefully this info will be useful to other Observium users. It's definitely a Cisco problem, not an Observium problem. As long as we remember to disable cisco-cef when installing a 2960C everything is fine.
- Richard-- 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_
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