industry standard for CoS value mapped to DSCP EF?

[SIMMN]

Hey,

I was looking for some documents configuring HP switches to work with cisco phones and running QoS. I found somehow other vendors (HP and Juniper) are by defualt mapping DSCP 46 or EF to CoS 6. My memory servers that Cisco mapps EF or DSCP 46 to CoS 5.

I know the DSCP-COS mapping can be modified but which one is the standard really?

/S                  

[piyujain]

In all the documents so far i have seen COS value 5 (DSCP EF/46) for RTP traffic. You may refer this doc :

http://www.cisco.com/en/US/technologies/tk543/tk879/technologies_white_paper0900aecd800a8561_ps6613_Products_White_Paper.html

Piyush Jain

[SIMMN]

Thanks, I know how Cisco does the qos mapping...but why other vendor does differently? QoS is not some propriotory stuff...

[piyujain]

If you looking for some industry standard documentation on QOS marking then you can refer IEEE 802.1P.. It is a mechanism for implementing QoS at the MAC level..

http://en.wikipedia.org/wiki/IEEE_P802.1p

But since you are working with Cisco Phones, they will mark RTP traffic at layer 2 (COS=5).. so i think you should configure your HP switch with cos value 5 for RTP traffic.. Hope this helps..

Piyush Jain