3560 mls qos interface statistics output

[Aaron Harrison]

Hi

I've seen questions like this before, but never seen a satisfactory answer... I can't find any good documentation anywhere about this command.

If you run it, you get tabular output of some statistics - with no headers to the columns.

The closest thing I've found to it is in this document:

http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12113ea1/3550cr/cli2.htm#wp2418191

It shows the fields as: Incoming, No_Change, Classified, Policed and dropped.

I have a switch with a modified cos-dscp map so that cos 5 is marked to dscp 46. This shows normal traffic as in the row titled 0-4 in the 'incoming' column, and cos 5 traffic appears in the 40-44 row and the 'dropped' column... which can't be right.

Anyone know what the columns mean?

Aaron

[jkeeffe · Accepted solution]

I figured this out after looking at it sideways and upside down. Here is part of the output from the command I ran on one of our 3750 switches (copy it and paste it into notepad so the rows stretch back out): 'sh mls qos int f0/35 statistics'

dscp: outgoing

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

0 - 4 : 63683 0 0 0 0

5 - 9 : 0 0 0 0 0

10 - 14 : 0 0 0 0 0

15 - 19 : 0 0 0 0 0

20 - 24 : 0 0 0 0 81

25 - 29 : 0 0 0 0 0

30 - 34 : 0 0 0 0 13366

35 - 39 : 0 0 0 0 0

40 - 44 : 0 0 0 0 0

45 - 49 : 0 10749 0 13653 0

50 - 54 : 0 0 0 0 0

55 - 59 : 0 0 0 0 0

On the left side X - X are the DSCP values for the five columns of that row. For example, 20 - 24 row has the number 81 in the fith column. That shows that 81 packets with the DSCP value of 24 went out of that port. In row 45 - 49, 10749 packets with DSCP of 46 and 13653 packets with DSCP value of 48 went out that port.

I finally was able to use this table to show that a video conferencing unit was truely generating voice packets with DSCP 46 (EF), video packets with DSCP 34, and call control packets with DSCP 24 (this is COS 3 that is mapped to DSCP 24 in the cos-dscp map entry.)

So to clarify, the five columns have nothing to do with Incoming, No_Change, Classified, Policed and dropped, they represent the number of packets that have the DSCP values as referred to by the far left table.

Hope this helps.

[Aaron Harrison]

It does indeed - it's fairly obvious now you've said it!

Thanks