RE: Router CPU usage high

["MERY Olivier (Neuilly Gestion)" <olivier.mery@cetelem.fr>]

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And if you want management to stay fully operational without SNMP process to
swallow all the cpu, take a look at
http://www.cisco.com/warp/public/490/9.html


Olivier MERY
Responsable Réseau
CETELEM
20, avenue Georges Pompidou
92595 LEVALLOIS-PERRET Cedex
Tel.    : +33146399729
Fax     : +33146391554
Email   : <mailto:olivier.mery@cetelem.fr>



-----Original Message-----
From: David E. Dimond [mailto:dimond@allina.com]
Sent: Monday, January 08, 2001 8:06 PM
To: IBM NetView Discussion
Subject: Re: [NV-L] Router CPU usage high


For all you'll ever need to know about this problem, please see:

http://www.cisco.com/warp/public/490/ipsnmphighcpu.html

In Netview, you can limit Route Entries to some small number (I use
10) under SNMP Configuration.  Emmis.



Stephen Elliott wrote:
> 
> Michael,
> 
> In order to help isolate which NV process might be impacting your router,
> you might want to turn off Discover New Nodes and Poll for Configuration
> Changes under Options, Topology/Status Polling Intervals. This should
limit
> NetView's activity to status polling only (Readers, please correct me if
I'm
> wrong on this). Then reverse the process one function at a time to see
which
> one is causing the additional load. Based on your findings, the next step
> would be to tune the parameters for that function to something that
doesn't
> load the router down.
> 
> If this doesn't help ID the offending process, then either Michael
Siebold's
> suggestion is in order (debug SNMP on the router), or Sniff out NetView's
> output to that router to see what particular poll is causing the damage.
> 
> Regards,
> 
> Steve Elliott
> Sr. Network Mgmt. Engineer
> epicRealm, Inc.
> 214-570-4560
> 
> -----Original Message-----
> From: michael.hamm@tudor.lu [mailto:michael.hamm@tudor.lu]
> Sent: Friday, January 05, 2001 3:41 AM
> To: nv-l@tkg.com
> Subject: [NV-L] Router CPU usage high
> 
> Strange CPU usage on a CISCO Router.
> 
> I poll just 1 time a minute to recive just one MIB value (CPUbusy)
> to check the CPU usage of the router.
> 
> Nearly periodically  every half houre the CPU usage go up to 70%.
> Once or twice a day the CPU usage go up to 99% - 100% for 1 houre.
> 
> in this time, the router shows me 85% of CPU usage go to IP SNMP Process.
> 
> Its a CISCO 2500  with IOS 11.3
> 
> Is it possible that NetView with one Request a minute is resonsible
> for this??? I cant belive. But ther is no other machine using
> SNMP to acces the router. And the SNMP process thakes 85% of CPU.
> 
> I check the interfaces for SNMP trafic. It is close to zero.
> 
> What can I do????
> 
> _________________________________________________________________________
> NV-L List information and Archives: http://www.tkg.com/nv-l
> _________________________________________________________________________
> NV-L List information and Archives: http://www.tkg.com/nv-l
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l

And if you want management to stay fully operational without SNMP process to swallow all the cpu, take a look at http://www.cisco.com/warp/public/490/9.html

Olivier MERY
Responsable Réseau
CETELEM
20, avenue Georges Pompidou
92595 LEVALLOIS-PERRET Cedex
Tel.    : +33146399729
Fax     : +33146391554
Email   : <mailto:olivier.mery@cetelem.fr>

-----Original Message-----
From: David E. Dimond [mailto:dimond@allina.com]
Sent: Monday, January 08, 2001 8:06 PM
To: IBM NetView Discussion
Subject: Re: [NV-L] Router CPU usage high

For all you'll ever need to know about this problem, please see:

http://www.cisco.com/warp/public/490/ipsnmphighcpu.html

In Netview, you can limit Route Entries to some small number (I use
10) under SNMP Configuration.  Emmis.

Stephen Elliott wrote:
>
> Michael,
>
> In order to help isolate which NV process might be impacting your router,
> you might want to turn off Discover New Nodes and Poll for Configuration
> Changes under Options, Topology/Status Polling Intervals. This should limit
> NetView's activity to status polling only (Readers, please correct me if I'm
> wrong on this). Then reverse the process one function at a time to see which
> one is causing the additional load. Based on your findings, the next step
> would be to tune the parameters for that function to something that doesn't
> load the router down.
>
> If this doesn't help ID the offending process, then either Michael Siebold's
> suggestion is in order (debug SNMP on the router), or Sniff out NetView's
> output to that router to see what particular poll is causing the damage.
>
> Regards,
>
> Steve Elliott
> Sr. Network Mgmt. Engineer
> epicRealm, Inc.
> 214-570-4560
>
> -----Original Message-----
> From: michael.hamm@tudor.lu [mailto:michael.hamm@tudor.lu]
> Sent: Friday, January 05, 2001 3:41 AM
> To: nv-l@tkg.com
> Subject: [NV-L] Router CPU usage high
>
> Strange CPU usage on a CISCO Router.
>
> I poll just 1 time a minute to recive just one MIB value (CPUbusy)
> to check the CPU usage of the router.
>
> Nearly periodically  every half houre the CPU usage go up to 70%.
> Once or twice a day the CPU usage go up to 99% - 100% for 1 houre.
>
> in this time, the router shows me 85% of CPU usage go to IP SNMP Process.
>
> Its a CISCO 2500  with IOS 11.3
>
> Is it possible that NetView with one Request a minute is resonsible
> for this??? I cant belive. But ther is no other machine using
> SNMP to acces the router. And the SNMP process thakes 85% of CPU.
>
> I check the interfaces for SNMP trafic. It is close to zero.
>
> What can I do????
>
> _________________________________________________________________________
> NV-L List information and Archives: http://www.tkg.com/nv-l
> _________________________________________________________________________
> NV-L List information and Archives: http://www.tkg.com/nv-l
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l