QoS on port where IPO500 connected

[biggizod]

Hi guys, I see a lot of docs mention to apply mls qos trust dscp on ports where phones are connected , dscp 46 for phones , and I have Cos-dscp map:
Policed-dscp map:
d1 : d2 0 1 2 3 4 5 6 7 8 9
---------------------------------------
0 : 00 01 02 03 04 05 06 07 08 09
1 : 10 11 12 13 14 15 16 17 18 19
2 : 20 21 22 23 24 25 26 27 28 29
3 : 30 31 32 33 34 35 36 37 38 39
4 : 40 41 42 43 44 45 46 47 48 49
5 : 50 51 52 53 54 55 56 57 58 59
6 : 60 61 62 63

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

Cos-dscp map:
cos: 0 1 2 3 4 5 6 7
--------------------------------
dscp: 0 8 16 24 32 40 46 56



but nowhere I could find about port QoS settings where IPO 500 is connected , as I found signaling Avaya marks as DSCP 34 . Should I change cos-to-dscp table to include dscp 34 to cos 4 ? Or its exist by default (DSCP-to-COS map table)and I just need to trust dscp on that port where IPO500 connected ?

 

[AvantiWade]

If all of your phones and the ip office exist on their own vlan you could just apply a blanket QOS policy to that VLAN so that all traffic is prioritized whether it is signalling or RTP.

 

[biggizod]

its not so easy dude, its enterprise network with SCN with existing different vlans, I have a policies on the routers but on the switches only mls qos . That's why please don't give me other options, I know what I could do , answer please if you know on my questions .
Thank you

 

[janni78]

It uses DSCP 34 for signaling and DSCP 46 for RTP.

"Trying is the first step to failure..." - Homer

 

[pkdev]

CoS is only on tagged packets. IP500 do not have 802.1q interface so you'll have to trust (or remark) DSCP on switchport connected to IP500
Phones do 802.1q so they mark CoS and DSCP

 

[mattKnight]

Don't worry about L2 markings
set your switches to map DSCP46 into the priority queue and ensure that you have end to end DSCP trust

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[biggizod]

Thank you al of you guys. But nobody answered my question , "..as I found signaling Avaya marks as DSCP 34 . Should I change cos-to-dscp table to include dscp 34 to cos 4 ? Or its exist by default (DSCP-to-COS map table which I provided here )and I just need to trust dscp on that port where IPO500 connected ?

 

[mattKnight]

Actually, I did, it was just implied in my answer,

Don't worry about L2 markings which implies that your COS DSCP tables are irrelevant, so no need to change them

Most Cisco switches convert the L2 marking to a DSCP marking for internal switch use, and this is where the COS-DSCP tables get used.

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[amriddle01]

This is probably best asked in the Cisco network forum, you know what the system does but your questions are about how to configure your Cisco equipment to deal with it, they will give you more specific/relevant answers than we will I wager