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Tiered QOS

Unanswered Question
Sep 5th, 2014
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Hi,

I am trying to mark packets at VAI interfaces and then use this markings to
classify traffic in different classes when they exit the router downstream
to carrier. I dont see packet being classified at physical interface yet
the ip precedence accounting shows correct marking

this is on 7200 12.2(33)SRE6 SP services and have also tried on 12.4 T but same results.

Scenario:

Traffic IN >>> LNS>>> VAI (policy outbound mark traffic) >>> Physical
interface >>(Shaping + queueing)

Configuration

VAI Class-maps and policy-map

class-map match-all GOLD
  match access-group 101

class-map match-all SILVER
  match access-group 102

access-list 101 permit icmp host 111.111.111.111 any
access-list 102 permit icmp host 222.222.222.222 any

policy-map STD_POLICY1
  class GOLD
   set dscp af21
  class SILVER
   set dscp af22
  class class-default


Show commands for VAI

LNS#show policy-map session
 SSS session identifier 7 -

  Service-policy output: STD_POLICY1

    Class-map: GOLD (match-all)
      4135 packets, 4522926 bytes
      30 second offered rate 9000 bps, drop rate 0000 bps
      Match: access-group 101
      QoS Set
        dscp af21
          Packets marked 4138

    Class-map: SILVER (match-all)
      3649 packets, 3831450 bytes
      30 second offered rate 9000 bps, drop rate 0000 bps
      Match: access-group 102
      QoS Set
        dscp af22
          Packets marked 3653

    Class-map: class-default (match-any)
      418 packets, 37270 bytes
      30 second offered rate 0000 bps, drop rate 0000 bps
      Match: any

LNS# show access-lists
Extended IP access list 101
    10 permit icmp host 111.111.111.111 any (4171 matches)
Extended IP access list 102
    10 permit icmp host 222.222.222.222 any (3685 matches)


====

Physical Interface Class-map and policy-map Configuration:


class-map match-all EF
  match  dscp ef
class-map match-any CS1
  match  dscp af11
  match  dscp af12
  match  dscp af13
class-map match-any CS2
  match  dscp af21
  match  dscp af22
  match  dscp af23
  match  dscp cs2
class-map match-any CS3
  match  dscp af31
  match  dscp af32
  match  dscp af33
class-map match-any CS4
  match  dscp af41
  match  dscp af42
  match  dscp af43

policy-map CHILD_POLICY
  class EF
    priority percent 10
  class CS4
    bandwidth percent 30
     random-detect dscp-based
    fair-queue
  class CS3
    bandwidth percent 20
     random-detect dscp-based
    fair-queue
  class CS2
    bandwidth percent 10
    fair-queue
     random-detect dscp-based
  class CS1
    bandwidth percent 5
    fair-queue
     random-detect dscp-based
  class class-default

>> Shaping policy

policy-map PARENT_1M_POLICY
  class class-default
    shape average 1000000
   service-policy CHILD_POLICY

SHOW COMMANDS FOR PHYSICAL INT

LNS# show policy-map interface
 FastEthernet0/0

  Service-policy output: PARENT_1M_POLICY

    Class-map: class-default (match-any)
      1148 packets, 90689 bytes
      5 minute offered rate 0000 bps, drop rate 0000 bps
      Match: any
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 8439/7685662
      shape (average) cir 1000000, bc 4000, be 4000
      target shape rate 1000000

      Service-policy : CHILD_POLICY

        queue stats for all priority classes:
          Queueing
          queue limit 64 packets
          (queue depth/total drops/no-buffer drops) 0/0/0
          (pkts output/bytes output) 0/0

        Class-map: EF (match-all)
          0 packets, 0 bytes
          5 minute offered rate 0000 bps, drop rate 0000 bps
          Match:  dscp ef (46)
          Priority: 10% (100 kbps), burst bytes 2500, b/w exceed drops: 0


        Class-map: CS4 (match-any)
          0 packets, 0 bytes
          5 minute offered rate 0000 bps, drop rate 0000 bps
          Match:  dscp af41 (34)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af42 (36)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af43 (38)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Queueing
          queue limit 64 packets
          (queue depth/total drops/no-buffer drops/flowdrops) 0/0/0/0
          (pkts output/bytes output) 0/0
          bandwidth 30% (300 kbps)
            Exp-weight-constant: 9 (1/512)
            Mean queue depth: 0 packets
            dscp       Transmitted      Random drop      Tail/Flow drop
Minimum Maximum Mark
                        pkts/bytes       pkts/bytes      pkts/bytes
thresh  thresh  prob

          Fair-queue: per-flow queue limit 16

        Class-map: CS3 (match-any)
          0 packets, 0 bytes
          5 minute offered rate 0000 bps, drop rate 0000 bps
          Match:  dscp af31 (26)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af32 (28)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af33 (30)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Queueing
          queue limit 64 packets
          (queue depth/total drops/no-buffer drops/flowdrops) 0/0/0/0
          (pkts output/bytes output) 0/0
          bandwidth 20% (200 kbps)
            Exp-weight-constant: 9 (1/512)
            Mean queue depth: 0 packets
            dscp       Transmitted      Random drop      Tail/Flow drop
Minimum Maximum Mark
                        pkts/bytes       pkts/bytes      pkts/bytes
thresh  thresh  prob

          Fair-queue: per-flow queue limit 16

        Class-map: CS2 (match-any)
          0 packets, 0 bytes
          5 minute offered rate 0000 bps, drop rate 0000 bps
          Match:  dscp af21 (18)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af22 (20)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af23 (22)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp cs2 (16)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Queueing
          queue limit 64 packets
          (queue depth/total drops/no-buffer drops/flowdrops) 0/0/0/0
          (pkts output/bytes output) 0/0
          bandwidth 10% (100 kbps)
          Fair-queue: per-flow queue limit 16
            Exp-weight-constant: 9 (1/512)
            Mean queue depth: 0 packets
            dscp       Transmitted      Random drop      Tail/Flow drop
Minimum Maximum Mark
                        pkts/bytes       pkts/bytes      pkts/bytes
thresh  thresh  prob


        Class-map: CS1 (match-any)
          0 packets, 0 bytes
          5 minute offered rate 0000 bps, drop rate 0000 bps
          Match:  dscp af11 (10)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af12 (12)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Match:  dscp af13 (14)
            0 packets, 0 bytes
            5 minute rate 0 bps
          Queueing
          queue limit 64 packets
          (queue depth/total drops/no-buffer drops/flowdrops) 0/0/0/0
          (pkts output/bytes output) 0/0
          bandwidth 5% (50 kbps)
          Fair-queue: per-flow queue limit 16
            Exp-weight-constant: 9 (1/512)
            Mean queue depth: 0 packets
            dscp       Transmitted      Random drop      Tail/Flow drop
Minimum Maximum Mark
                        pkts/bytes       pkts/bytes      pkts/bytes
thresh  thresh  prob


        Class-map: class-default (match-any)
          1148 packets, 90689
bytes                                                          #####PACKETS
MATCHING HERE INSTEAD OF CLASSES ABOVE
          5 minute offered rate 0000 bps, drop rate 0000 bps
          Match: any

          queue limit 64 packets
          (queue depth/total drops/no-buffer drops) 0/0/0
          (pkts output/bytes output) 8439/7685662


###PRECEDENCE ACCOUNTING

LNS#  show int fa0/0 precedence
FastEthernet0/0
  Output
    Precedence 0:  697 packets, 46002 bytes
    Precedence 2:  7062 packets, 7697580 bytes
    Precedence 6:  430 packets, 51888 bytes


So in short the VAI policy is marking packet correctly, IP precedence
accounting shows hits but on the main policy it skips its..

Interestingly if i remove VAI policy and mark the packets from an upstream
router using extended pings they are identified by the physical interface
correctly and matches against appropriate classes.

Any hints will be appreciated.

Cheers
Hitesh
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