Task 8.2 Traffic Marking..

Here is my answer to the question 8.2. Is this correct? It says to mark all outgoing packet except VOIP and OSPF packets with DE-bit.

 

!

class-map match-all CRITICAL

 match not packet length min 80 max 100

 match not protocol ospf

 match any

!

 

policy-map STRICT

 class CRITICAL

  set fr-de

!


I am not sure I agree with SG with the way it classified the traffic. Wouldn't class ANY set fr-de on all packet including the OSPF and VOIP because it is not excluded from the ANY class! Pls help.


class-map match-any CRITICAL

 match packet length min 80 max 100

 match protocol ospf

 

!

policy-map MARK

 class CRITICAL 

 class ANY

 set fr-de

 

Comments

  • Chriso,

    In the policy-map traffic that matches CRITICAL would therefore be excluded from further criteria and therefore not marked with FR-DE.  If the order were ANY then CRITICAL is would match ANY and not progress to CRITICAL as you suggest.


  • I am not sure I agree with SG with the way it classified the traffic. Wouldn't class ANY set fr-de on all packet including the OSPF and VOIP because it is not excluded from the ANY class! Pls help.


    class-map match-any CRITICAL

     match packet length min 80 max 100

     match protocol ospf

     

    !

    policy-map MARK

     class CRITICAL 

     class ANY

     set fr-de

    Hi Chriso,

    You solution also correct: 

    Either you can create a separate CLASS ANY and match any or use class class-default under policy-map and enable the Discard Bit.

    I did a quick test working fine.

    R6#show policy-map interface s1/0.604

     Serial1/0.604

      Service-policy output: MARK

        Class-map: CRITICAL (match-any)
          129 packets, 11052 bytes
          5 minute offered rate 0 bps
          Match: packet length min 80 max 100
            122 packets, 10484 bytes
            5 minute rate 0 bps
          Match: protocol ospf
            7 packets, 568 bytes
            5 minute rate 0 bps

        Class-map: class-default (match-any)
          12 packets, 3804 bytes
          5 minute offered rate 0 bps, drop rate 0 bps
          Match: any
          QoS Set
            fr-de
              Packets marked 12

    R6#show frame-relay pvc 604

    PVC Statistics for interface Serial1/0 (Frame Relay DTE)

    DLCI = 604, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial1/0.604

      input pkts 183           output pkts 174          in bytes 20464
      out bytes 20046          dropped pkts 0           in pkts dropped 0
      out pkts dropped 0                out bytes dropped 0
      in FECN pkts 0           in BECN pkts 0           out FECN pkts 0
      out BECN pkts 0          in DE pkts 0             out DE pkts 13
      out bcast pkts 159       out bcast bytes 18486
      5 minute input rate 0 bits/sec, 0 packets/sec
      5 minute output rate 0 bits/sec, 0 packets/sec
      pvc create time 00:22:06, last time pvc status changed 00:19:31

    Good Luck

     

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