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6500-qos-drops

I have a problem with an interface Gi that it has qos enable. It drops packets in priority queue ( cos 5 asignated), following the q2 and there is not drops on q1.

This is the status:

Interface GigabitEthernet9/32 queueing strategy: Weighted Round-Robin

Port QoS is enabled

Trust state: trust COS

Extend trust state: not trusted [COS = 0]

Default COS is 0

Transmit queues [type = 1p2q2t]:

Queue Id Scheduling Num of thresholds

-----------------------------------------

1 WRR low 2

2 WRR high 2

3 Priority 1

WRR bandwidth ratios: 100[queue 1] 255[queue 2]

queue-limit ratios: 70[queue 1] 15[queue 2]

queue random-detect-min-thresholds

----------------------------------

1 40[1] 70[2]

2 40[1] 70[2]

queue random-detect-max-thresholds

----------------------------------

1 70[1] 100[2]

2 70[1] 100[2]

queue thresh cos-map

---------------------------------------

1 1 0 1

1 2 2 3

2 1 4 6

2 2 7

3 1 5

Receive queues [type = 1q2t]:

Queue Id Scheduling Num of thresholds

-----------------------------------------

1 Standard 2

queue tail-drop-thresholds

--------------------------

1 100[1] 100[2]

queue thresh cos-map

---------------------------------------

1 1 0 1 2 3 4

1 2 5 6 7

Packets dropped on Transmit:

BPDU packets: 0

queue thresh dropped [cos-map]

---------------------------------------------------

1 1 0 [0 1 ]

1 2 0 [2 3 ]

2 1 0 [4 6 ]

2 2 486* [7 ]

3 1 486* [5 ]

* - shared transmit counter

Packets dropped on Receive:

BPDU packets: 0

queue thresh dropped [cos-map]

---------------------------------------------------

1 1 0 [0 1 2 3 4 ]

1 2 0 [5 6 7 ]

Thanks,

Marcelo

  • Other Network Infrastructure Subjects
1 REPLY
Silver

Re: 6500-qos-drops

check out the following link on Troubleshooting Output Drops with Priority Queueing, hope this helps :

http://www.cisco.com/en/US/tech/tk39/tk51/technologies_tech_note09186a0080103e8a.shtml

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