Monitoring queue depth and drops

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Nov 10th, 2009
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Is there a mib that contains queue information (depth & drops) per COS to queue mapping. This IOS 12.2(33)SXH4 command provides that info (show queueing interface gig 4/43) but I'd like to poll via SNMP if possible. Thxs.

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paulgdial Wed, 11/11/2009 - 09:03
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This mib doesn't appear to supply the queue info I'm looking for - see details below. Is there another mib that might contains info for WRR queues or am I misinterpreting the cisco-queue-mib info? Thanks, paul


Details:


The Cisoc-QUEUE-MIB says it follows the interfaces mib (for indexing I presume). Here is what I see when looking at one interface.


From the interfaces MIB:


IF-MIB::ifDescr.187 = STRING: GigabitEthernet4/43


Using '187' as the index, here is the queue info that the Cisco-QUEUE-MIB returns:


SNMPv2-SMI::enterprises.9.9.37.1.1.1.1.187 = INTEGER: 1 cQIfQType


The available types are:

1 = fifo

2 = priority

3 = custom

4 = weightedFair


NOTE: none of these appear to match WRR which is what gig 4/43 is configured as.



SNMPv2-SMI::enterprises.9.9.37.1.1.1.2.187 = INTEGER: 0 cQIfTxLimit

SNMPv2-SMI::enterprises.9.9.37.1.1.1.3.187 = INTEGER: 1 cQIfSubqueues

SNMPv2-SMI::enterprises.9.9.37.1.2.1.2.187.2 = Gauge32: 0 cQStatsDepth

SNMPv2-SMI::enterprises.9.9.37.1.2.1.3.187.2 = INTEGER: 40 cQStatsMaxDepth

SNMPv2-SMI::enterprises.9.9.37.1.2.1.4.187.2 = Counter32: 0 cQStatsDiscards


Here is a snippet of the output from the 'show queueing interface gig 4/43 command:


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

show queueing interface gig 4/43

Interface GigabitEthernet4/43 queueing strategy: Weighted Round-Robin

Port QoS is enabled

Port is untrusted

Extend trust state: not trusted [COS = 0]

Default COS is 0

Queueing Mode In Tx direction: mode-cos

Transmit queues [type = 1p3q8t]:

Queue Id Scheduling Num of thresholds

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

01 WRR 08

02 WRR 08

03 WRR 08

04 Priority 01



queue thresh cos-map

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

1 1 0

1 2 1

1 3

1 4

1 5

1 6

1 7

1 8

2 1 2

2 2 3 4

2 3

2 4

2 5

2 6

2 7

2 8

3 1 6 7

3 2

3 3

3 4

3 5

3 6

3 7

3 8

4 1 5


Packets dropped on Transmit:

BPDU packets: 0


queue thresh dropped [cos-map]

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

1 1 1594515 [0 ]

1 2 0 [1 ]

2 1 0 [2 ]

2 2 0 [3 4 ]

3 1 0 [6 7 ]

4 1 0 [5 ]



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