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QoS Queues - Why is ef queue empty?

I have the following policy in place and am unsure as to why the ef  queue is empty.  I see the ef packets being matched and the first  portion of the output indicates ef packets going to the priority queue,  but the following table shows the ef queue shows 0/0 accross the board  and the other packet counts don't seem to add up.  Oh and what is the "cs6"

Thanks!

sho policy-map in s0/0/0

  Serial0/0/0

    Service-policy output: qos

      Class-map: enhanced (match-any)
     18929450 packets, 1332072895 bytes
     5 minute offered rate 0 bps, drop rate 0 bps
     Match: ip dscp af31 (26)
       18929450 packets, 1332072895 bytes
       5 minute rate 0 bps
     Queueing
       Output Queue: Conversation 265
       Bandwidth 384 (kbps)Max Threshold 64 (packets)
       (pkts matched/bytes matched) 2355392/230029119
       (depth/total drops/no-buffer drops) 0/8977/0

      Class-map: high (match-any)
     532831636 packets, 98884721243 bytes
     5 minute offered rate 28000 bps, drop rate 0 bps
     Match: ip dscp ef (46)
       532831636 packets, 98884721243 bytes
       5 minute rate 28000 bps
     Queueing
       Strict Priority
       Output Queue: Conversation 264
       Bandwidth 33 (%)
       Bandwidth 509 (kbps) Burst 12725 (Bytes)
       (pkts matched/bytes matched) 464933441/93016817984
       (total drops/bytes drops) 0/0

      Class-map: class-default (match-any)
     716229182 packets, 359913582844 bytes
     5 minute offered rate 78000 bps, drop rate 0 bps
     Match: any
     Queueing
       Flow Based Fair Queueing
       Maximum Number of Hashed Queues 256
       (total queued/total drops/no-buffer drops) 0/262326/0
       exponential weight: 9

    dscp    Transmitted      Random drop      Tail drop    Minimum Maximum  Mark
         pkts/bytes       pkts/bytes       pkts/bytes    thresh  thresh  prob
     af11 442253270/187375309113   4279/1367847    25282/6128087     32      40  1/10
     af12       0/0               0/0              0/0           28      40  1/10
     af13       0/0               0/0              0/0           24      40  1/10
     af21       0/0               0/0              0/0           32      40  1/10
     af22       0/0               0/0              0/0           28      40  1/10
     af23       0/0               0/0              0/0           24      40  1/10
     af31       0/0               0/0              0/0           32      40  1/10
     af32       0/0               0/0              0/0           28      40  1/10
     af33       0/0               0/0              0/0           24      40  1/10
     af41       0/0               0/0              0/0           32      40  1/10
     af42       0/0               0/0              0/0           28      40  1/10
     af43       0/0               0/0              0/0           24      40  1/10
       cs1       0/0               0/0              0/0           22      40  1/10
       cs2       0/0               0/0              0/0           24      40  1/10
       cs3       0/0               0/0              0/0           26      40  1/10
       cs4       0/0               0/0              0/0           28      40  1/10
       cs5       0/0               0/0              0/0           30      40  1/10
       cs6 1886907/155518082       0/0              0/0           32      40  1/10
       cs7       0/0               0/0              0/0           34      40  1/10
       ef       0/0               0/0              0/0           36      40  1/10
     rsvp       0/0               0/0              0/0           36      40  1/10
   default 271826679/172030878784 229072/338913149   3693/5467782     20      40  1/10

4 REPLIES
Cisco Employee

Re: QoS Queues - Why is ef queue empty?

Hi,

The "following table" is for class-default; EF packets are matched in "high" class, and put in priority queue. C6 could be the routing protocol, or other control plane traffic.

HTH,

Lei Tian

Re: QoS Queues - Why is ef queue empty?

Hi,

The default class is assigned (IP Precedence =1) , (AF11) by default if not marked. and thats what the table indicates.

the ef is matched in the class and put into priority queue,

Regards,

Mohamed

New Member

Re: QoS Queues - Why is ef queue empty?

Ahh, ok.

So, the table is simply listing anything not matched and queued in the policy-maps.   Correct?

Am I now reading this correctly:

- Conversation 264 is the Priority Queue with 33% of the bandwitch.  This is for all ef packets

- Conversation 265 is some other queue with 384k for af31 packets.  <---what is this queue?

- ramaining traffic goes to the default-queue and we are seeing af11 (default marked) and cs6 (possible routing protocols, etc)

- what is "default" traffic at the bottom of the table?

Thanks for your assistance, both of you.

Cisco Employee

Re: QoS Queues - Why is ef queue empty?

Hi,

That is correct.

Class "enhanced" matches packets with dscp af31, and it uses conversaction 265; class "high" matches packets with dscp ef, and it ues conversaction 264. The rest traffic are in "class-default". There are 3 type of traffic in class-default, traffic with dscp cs6, af11 and default(0). You need to check the marking configure to see what traffic is been marked to af11 or 0.

HTH,

Lei Tian

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