[c-nsp] 7206VXR NPE-G1 Upgrade from 12.4 to 15.0 High CPU

[Chuck Church]

Wasn't the G1 the one that Rodney Dunn mentioned would perform well at high
CPU load, and the CPU usage didn't increase linearly with the PPS, or was
that the G2?  Personally, I had a G2 running 15.0(1)M5 doing complicated
SLA/policy routing, and 50 megabit didn't move it past 3 or 4%, 2 peers with
maybe 10,000 prefixes (full DISA table).

Chuck

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Chris Gotstein
Sent: Wednesday, August 24, 2011 7:57 PM
To: Joe Maimon
Cc: cisco-nsp
Subject: Re: [c-nsp] 7206VXR NPE-G1 Upgrade from 12.4 to 15.0 High CPU

We had definite issues when the CPU starting getting above 80%.  At 90% 
it was almost unusable.

On 8/24/2011 5:02 PM, Joe Maimon wrote:
> I have seen this in other instances as well. A 2811 never dips below 10%
> (cpu is graphed) even off-peak with nothing going on. The 1700 it
> replaced properly flat-lined to 0% at the same times.
>
> It remains to be seen whether this is an aesthetic issue or an actual
> problem.
>
> I am looking at a G1 running 15.0 pushing a few hundred mbps peaking at
> near 90% (cpu graph) without any user reported issues reaching me. Some
> of that traffic is IOS FW, some is ATM, most is inter-vlan. Full tables.
>
> Joe
>
> Chris Gotstein wrote:
>> Decided to move from IOS 12.4 to 15.0 (15.0(1)M7) on a 7206VXR with
>> NPE-G1. Since doing the upgrade, i've seen increased CPU usage in the
>> IP Input process. The configuration remained the same after the upgrade.
>> Verified CEF on all interfaces. Followed troubleshooting docs on Cisco's
>> site, as well as searching the archives of nsp. Not able to find any
>> info to help troubleshoot this issue. This is an edge router connecting
>> to our 2 upstream providers, taking full BGP routes. As of 4am (CST),
>> traffic is pretty much dead, less than 20Mbs going through, and CPU
>> usage is at 35%. Normally it's around 10% for this time of night. Any
>> ideas of what could be going on? I haven't downgraded the IOS just yet,
>> hoping to see if i might have missed something easy. Thanks,
>>

-- 
---- ---- ---- ----
Chris Gotstein, Network Engineer, U.P. Logon/Computer Connection U.P.
http://uplogon.com | +1 906 774 4847 | chris at uplogon.com
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