[AusNOG] Cisco 7201 CPU hog

[James Mcintosh]

#show ip cef switching statistics

Path   Reason                          Drop       Punt  Punt2Host
RP LES Packet destined for us             0   40408909          0
RP LES No adjacency                17030620          0          0
RP LES Incomplete adjacency               9          0          0
RP LES Routed to Null0                  767          0          0
RP LES Features                           0          0          5
RP LES Neighbor resolution req       344387          5          0
RP LES Total                       17375783   40408914          5

RP PAS No route                        5777          0      90578
RP PAS Packet destined for us             0   40408909      52629
RP PAS No adjacency                 5239405          0          0
RP PAS Incomplete adjacency          569007          0          0
RP PAS Bad checksum                     463          0          0
RP PAS TTL expired                        0          0    1931554
RP PAS IP options set                     0          0          1
RP PAS Routed to Null0             60926963          0      14167
RP PAS Features                    20585356          0    7113677
RP PAS IP redirects                       0          0        184
RP PAS Unclassified reason            69264          0          0
RP PAS Neighbor resolution req      1705675          0          0
RP PAS Bad IP packet header leng          2          0          0
RP PAS Link-layer broadcast/mult      15150          0          0
          
Path   Reason                          Drop       Punt  Punt2Host
RP PAS Total                       89117062   40408909    9202790

All    Total                      106492845   80817823    9202795



________________________________
 From: Greg Foletta <puglet at puglet.net>
To: Sam Silvester <sam.silvester at gmail.com> 
Cc: "ausnog at lists.ausnog.net" <ausnog at lists.ausnog.net> 
Sent: Friday, 10 August 2012 11:46 AM
Subject: Re: [AusNOG] Cisco 7201 CPU hog
 

I would also run a 'show ip cef switching statistics'

If the switch is using CEF, the data plane is not CPU bound, unless it's getting punted to CPU for some of the following reasons:
*Fragmentation
*NAT (not sure if 7201 has hardware NAT acceleration)
*ICMP redirect
*IP options
*GRE tunnel
*a couple of others.


On 10 August 2012 11:21, Sam Silvester <sam.silvester at gmail.com> wrote:

On Fri, Aug 10, 2012 at 9:53 AM, Paul Wilkins <paulwilkins369 at gmail.com> wrote:
>> James,
>> Which NPE?
>>
>
>The 7201 doesn't have an interchangeable NPE - from my understanding
>the processor is equivalent to a G2 but in a 1RU form factor (4 x 1GE
>plus a single PA slot)
>
>Sam
>
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>AusNOG mailing list
>AusNOG at lists.ausnog.net
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