There used to be an undocumented command in Cisco IOS that would provide statistics about how packets were being dealt with -- namely 'show interface switch'. A sample output of the command: Ethernet1/1 Throttle count: 0 Protocol Path Pkts In Chars In Pkts Out Chars Out Other Process 451 54909 24890 1493400 Cache misses 0 Fast 0 0 0 0 Auton/SSE 0 0 0 0 IP Process 17354 2180875 123854 12437965 Cache misses 18678 Fast 13066464 788505528 11642545 4290345939 Auton/SSE 0 0 0 0 Trans. Bridge Process 0 0 104 6240 Cache misses 0 Fast 549 38962 63 8268 Auton/SSE 0 0 0 0 DEC MOP Process 0 0 414 31878 Cache misses 0 Fast 0 0 0 0 Auton/SSE 0 0 0 0 Spanning Tree Process 0 0 584 35040 Cache misses 0 Fast 0 0 0 0 Auton/SSE 0 0 0 0 ARP Process 75404 4531576 149 8940 Cache misses 0 Fast 0 0 0 0 Auton/SSE 0 0 0 0 CDP Process 35 10885 533 168537 Cache misses 0 Fast 0 0 0 0 Auton/SSE 0 0 0 0 For certain this command exists in versions of 11.X vintage, although it seems to have disappeared in 12.X. Does anyone know why it has been abandoned? These are usefull statistics from a debugging perspective (i.e. why is this router crumbling under high traffic load? because it's process switching all of its packets) and I don't think that it's possible to garner them from netflow. Has it been replaced by another undocumented command? Cheers, Will Waites ww@pandora.styx.org
ww wrote:
There used to be an undocumented command in Cisco IOS that would provide statistics about how packets were being dealt with -- namely 'show interface switch'. A sample output of the command:
There are two commands (undocumented even in 12.0): 'show int switching' <---switching MUST BE SPELLED OUT 'show int s' <---provides a summary form of the above If the latter is an abbreviation for something, I don't know what it is. There is also a 'show align' for anyone getting alignment or spurious memory references logged. Jeff Kell <jeff-kell@utc.edu>
A revised document talks about this (page 63), as well as several of the other recent questions on the NANOG list. http://www.cisco.com/public/cons/isp/documents/IOSEssentialsPDF.zip This document is wonderful! It appears to be version 2.82, but I've never seen it before. I first saw it in Paul Ferguson's message a couple of weeks ago, and also found it off his www.denialinfo.com page. Jeff Kell wrote:
There are two commands (undocumented even in 12.0):
'show int switching' <---switching MUST BE SPELLED OUT 'show int s' <---provides a summary form of the above
WSimpson@UMich.edu Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32
There are two commands (undocumented even in 12.0):
'show int switching' <---switching MUST BE SPELLED OUT 'show int s' <---provides a summary form of the above
If the latter is an abbreviation for something, I don't know what it is.
The "s" in your second command is short for stats. It doesn't look like this command is referenced in cisco's IOS Essentials doc that was mentioned earlier. That just shows the 'show interface switching' command. routerA#show interface stats FastEthernet0/1/0 Switching path Pkts In Chars In Pkts Out Chars Out Processor 207745 14075132 270885 21915788 Route cache 0 0 0 0 Distributed cache 93 9729 0 0 Total 207838 14084861 270885 21915788 Jamie Byrne
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ww