Re: QoS DSCP marking inbound 3550

From: Pierre-Alex (paguanel@hotmail.com)
Date: Sun May 28 2006 - 14:08:35 ART


Thanks Petr,

My traffic is being marked on R5

However the counters on the switch are not incrementing.

Is this a bug, or is it normal (i.e. the counters only work in the outbound
direction)?

  ----- Original Message -----
  From: Petr Lapukhov
  To: Pierre-Alex
  Cc: ccielab@groupstudy.com
  Sent: Sunday, May 28, 2006 6:40 PM
  Subject: Re: QoS DSCP marking inbound 3550

  Pierre,

  Basically, you cannot classify/mark traffic with class-default on 3550.
  At least, it did not work with me :)

  You need to match ip packets witch IP access-list, e.g.

  class IP
  match access-group 100

  access-list 100 permit ip any any

  policy-map MARK
  class IP
    set ip dscp 11

  HTH
  Petr

  2006/5/28, Pierre-Alex <paguanel@hotmail.com>:
    I am trying to accomplish the following (apparently very basic):

    Diagram:

    R5 --------------(fa0/5)---Switch--(fa0/4)------------------R4

    Task:

    On switch2 mark all packets coming from R5 with af11.
    Do this on port fa 0/5

    Configs:

    On Switch:

    interface FastEthernet0/5
    switchport access vlan 34
    switchport mode access
    service-policy input r5-i

    policy-map r5-i
      class class-default
       set dscp 11

    Verification:

    I am pinging R4 from R5 and checking the dscp received using a class-map
on
    R4
    As you can see, no packet is marked

    On R4

    r4#sh policy-map interface
    Ethernet0/1.34

      Service-policy input: marking

          Class-map: af11 (match-all)
          0 packets, 0 bytes
          30 second offered rate 0 bps
          Match: ip dscp af11 (10)

        Class-map: class-default (match-any)
          1006859 packets, 118805079 bytes
          30 second offered rate 408000 bps, drop rate 0 bps
          Match: any

    Please note that configuring "mls qos trust dscp" removes the service
policy
    from the interface . So adding this command does not solve the problem

    Any idea?

    Thanks

    Pierre

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