Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

industry standard for CoS value mapped to DSCP EF?

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                  

3 REPLIES
Cisco Employee

industry standard for CoS value mapped to DSCP EF?

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

New Member

industry standard for CoS value mapped to DSCP EF?

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

Cisco Employee

industry standard for CoS value mapped to DSCP EF?

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

980
Views
0
Helpful
3
Replies
CreatePlease login to create content