QoS show commands in Cat4500

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Jul 7th, 2009
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Is there any show commands in Catalyst 4500 that can see we can use to see queuing statistics, e.g, counters to show how many packets are dropped/queued in a particular queue?

So far i only see

show qos

show qos dbl

show qos interface

show qos maps

which does not show what i wanted to see.

Any idea?


Eng Wee

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e-chuah Tue, 07/07/2009 - 05:39
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Thanks for the reply. But it looks like it is only applicable when u use policing. If i have the below auto-qos config that does only queueing, does the show policy-map command still provide the same output? (sorry, i do not have a cat4500 to try it out right now)

policy-map autoqos-voip-policy

class class-default


interface GigabitEthernet3/1

service-policy output autoqos-voip-policy

qos trust cos

auto qos voip trust

tx-queue 1

shape percent 10

tx-queue 3

priority high

shape percent 33

Thanks for your help.


Eng Wee

Edison Ortiz Tue, 07/07/2009 - 05:49
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The commands you posted along with 'show policy-map interface' are the only commands available for QoS troubleshooting in the 4500. Since most switches employ Hardware-Based QoS, granular information will be missing from its statistics.



jedellerby Fri, 11/06/2009 - 01:21
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The commands I use on a 4500 for checking QoS counters/general QoS info are:

show interface counter all module x

show interface x/y counter detail

show platform hardware qos interface gigabitEthernet x/y

show qos int x/y

These should give you the QoS counters showing per queue counters, per queue drops and DBL drops when DBL is enabled,



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