Solved: qos statistics on 2960 with cisco phone

Sergey Balyura · ‎09-20-2012

Hi all!

please help me in understanding of "mls qos interface stat"

I took a switch and connected it to my LAN

switch is 2960 with LanBase image and PoE

on it I have 3 interfaces in up state - 2 interfaces with cisco phones (6921 and 9951) nad 1 interface as uplink

here is its configuration

interface FastEthernet0/1

switchport mode access

switchport voice vlan 555

mls qos trust device cisco-phone

spanning-tree portfast

!

interface FastEthernet0/2

switchport mode access

switchport voice vlan 555

mls qos trust device cisco-phone

spanning-tree portfast

!

...

interface GigabitEthernet0/1

switchport mode trunk

priority-queue out

mls qos trust dscp

!

I made just a call from one 9951 towards

I have no other devices on switch. so I have only voip traffic.

but why do I see the next stat screen?

test2960#sh mls qos int f0/1 sta

FastEthernet0/1 (All statistics are in packets)

dscp: incoming

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

0 - 4 : 0 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 48

25 - 29 : 0 0 0 0 0

30 - 34 : 0 0 0 0 0

35 - 39 : 0 0 0 0 0

40 - 44 : 0 0 0 0 0

45 - 49 : 0 3064 0 4 0

50 - 54 : 0 0 0 0 0

55 - 59 : 0 0 0 0 0

60 - 64 : 0 0 0 0

dscp: outgoing

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

0 - 4 : 1512498 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 0

25 - 29 : 0 0 0 0 0

30 - 34 : 0 0 0 0 0

35 - 39 : 0 0 0 0 0

40 - 44 : 729 0 0 0 0

45 - 49 : 0 0 0 0 0

50 - 54 : 0 0 0 0 0

55 - 59 : 0 0 0 0 0

60 - 64 : 0 0 0 0

cos: incoming

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

0 - 4 : 27 0 0 48 0

5 - 7 : 3064 4 0

cos: outgoing

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

0 - 4 : 1581099 0 0 0 0

5 - 7 : 729 0 0

output queues enqueued:

queue: threshold1 threshold2 threshold3

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

queue 0: 729 0 0

queue 1: 1569605 425 2043

queue 2: 0 0 0

queue 3: 0 0 11072

output queues dropped:

queue: threshold1 threshold2 threshold3

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

queue 0: 0 0 0

queue 1: 0 0 0

queue 2: 0 0 0

queue 3: 0 0 0

Policer: Inprofile: 0 OutofProfile: 0

and

test2960#sh mls qos int f0/2 sta

FastEthernet0/2 (All statistics are in packets)

dscp: incoming

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

0 - 4 : 2 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 0 171

25 - 29 : 0 0 0 0 0

30 - 34 : 0 0 0 0 0

35 - 39 : 0 0 0 0 0

40 - 44 : 0 0 0 0 0

45 - 49 : 0 5689 0 0 0

50 - 54 : 0 0 0 0 0

55 - 59 : 0 0 0 0 0

60 - 64 : 0 0 0 0

dscp: outgoing

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

0 - 4 : 2095831 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 14

25 - 29 : 0 0 0 0 0

30 - 34 : 0 0 0 0 0

35 - 39 : 0 0 0 0 0

40 - 44 : 3348 0 0 0 0

45 - 49 : 0 0 0 1 0

50 - 54 : 0 0 0 0 0

55 - 59 : 0 0 0 0 0

60 - 64 : 0 0 0 0

cos: incoming

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

0 - 4 : 56 0 0 171 0

5 - 7 : 5689 0 0

cos: outgoing

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

0 - 4 : 2178523 0 0 14 0

5 - 7 : 3348 1 0

output queues enqueued:

queue: threshold1 threshold2 threshold3

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

queue 0: 3348 0 0

queue 1: 2164282 590 2397

queue 2: 14 0 0

queue 3: 1 0 13653

output queues dropped:

queue: threshold1 threshold2 threshold3

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

queue 0: 0 0 0

queue 1: 0 0 0

queue 2: 0 0 0

queue 3: 0 0 0

Policer: Inprofile: 0 OutofProfile: 0

All incoming traffic is as I expect - DSCP 48, CoS 5

but all outgoing traffic???

Should notice I have next statements in config too:

mls qos map cos-dscp 0 8 16 24 32 46 48 56

mls qos

And I use CUCM 7.1 (if it is important)

Please help me to understand!!!

singhaam007 · ‎09-20-2012

Hello,

DSCP 46 suppose to map to COS 5, which is recommended.

Try this on ur uplink

interface GigabitEthernet0/1

switchport mode trunk

priority-queue out

mls qos trust coz

Because this is a layer, 2 interface.

Check this attached document and let me know if had any question

Please rate this information is helpful.

thanks

View solution in original post

singhaam007 · ‎09-20-2012

Hello,

DSCP 46 suppose to map to COS 5, which is recommended.

Try this on ur uplink

interface GigabitEthernet0/1

switchport mode trunk

priority-queue out

mls qos trust coz

Because this is a layer, 2 interface.

Check this attached document and let me know if had any question

Please rate this information is helpful.

thanks

srikanth ath · ‎09-20-2012

Thanks for the doc Amrinder, actually i was looking to understand the basic wherein you have provided it.

regards

srikanth

singhaam007 · ‎09-20-2012

Hi Srikanth ,

ur welcome mate.

glad i help u.

cheers

Sergey Balyura · ‎09-25-2012

hi guys!

thanx for a great article, Amrinder!

but I still have questions.

1. "DSCP to QoS map" - what is it?

2. where can I read smth about "Internal DSCP"?

singhaam007 · ‎09-25-2012

Hi Srikanth ,

You can use see blow its showing both cos to dscp and dscp to cos

Network-Test#sh mls qos maps cos-dscp

Cos-dscp map:

cos: 0 1 2 3 4 5 6 7

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

dscp: 0 8 16 24 32 46 48 56

Network-Test#sh mls qos maps dscp-cos

Dscp-cos map:

d1 : d2 0 1 2 3 4 5 6 7 8 9

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

0 : 00 00 00 00 00 00 00 00 01 01

1 : 01 01 01 01 01 01 02 02 02 02

2 : 02 02 02 02 03 03 03 03 03 03

3 : 03 03 04 04 04 04 04 04 04 04

4 : 05 05 05 05 05 05 05 05 06 06

5 : 06 06 06 06 06 06 07 07 07 07

6 : 07 07 07 07

as you can see cos 5 mapped to DSCP 46

Cos is layer 2 marking and DSCP is layer 3. if you enable Auto Qos on switch it will automatically create these table and handle the traffic.

http://www.ciscopress.com/articles/article.asp?p=170743&seqNum=3

check this link for more detail.

please rate if this helps

thanks

Sergey Balyura · ‎09-25-2012

Hello, Amrinder!

please correct me if I'm wrong.

internal DSCP = ingress DSCP if I have "mls qos trust dscp"

internal DSCP is taken from cos-to-dscp map if I have "mls qos trust cos"

egress cos is taken from dscp-to-cos table, where dscp=internal dscp

thanks

singhaam007 · ‎09-26-2012

hello mate,

as far i think you r correct.

check this link

http://www.brocade.com/downloads/documents/html_product_manuals/B6910_CFG_2104/wwhelp/wwhimpl/common/html/wwhelp.htm#href=class%20of%20service-commands.25.4.html&single=true

thanks

Sergey Balyura · ‎09-26-2012

thanx a lot. but this is a brocade cli manual not cisco... is it good idea to use it?

singhaam007 · ‎09-26-2012

oh sorry my bad bit tired now, check this one

http://www.cisco.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_55_se/configuration/guide/swqos.html#wp1031564

scroll down to dscp section.

thanks