QoS 2960 MQC

[Alex Pfeil]

I have a Cisco 2960 switch with a video conferencing unit connected.  For testing purposes, I setup an access-list, class-map, and policy-map and applied it to the incoming port to change the DSCP value of the packets.  The policy-map on the interface shows all 0s.  Should this work and is the output of the command normal? Can I only mark the dscp value on an outgoing trunk interface?

int fa0/0

service-policy input MARK-ME

ip access-list extended VIDEO

10 permit ip any any

class-map VIDEO

match access-group name VIDEO

policy-map MARK-ME

class VIDEO

set dscp cs5

  Service-policy input: MARK-ME

    Class-map: VIDEO (match-any)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: access-group name VIDEO
        0 packets, 0 bytes
        5 minute rate 0 bps

    Class-map: class-default (match-any)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: any
        0 packets, 0 bytes

Thanks in advance!

Alex

[Terry Cheema]

The values are showing as 0 as the queuing for switches would be done in hardware so the counters do not increment so this is normal.

As long as your ACLs are matching traffic you should be able to classify and mark the traffic.

There's a documented defect for this:

Ref: https://tools.cisco.com/bugsearch/bug/CSCso80701

"show policy-map interface" in 2960, 2970, 3560, 3750 should give error

CSCso80701

Description

Symptom:
"show policy-map interface" shows no matches

Conditions:
This command is run on one of the following switches:
2950
2960
2970
3550
3560
3750

Workaround:
This is a hardware limitation and these switches do not support this output.
However, the following show command can be used as a workaround:
"show mls qos interface

-Terry

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