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

QOS design and best practices

Hi all, has anyone got any easy guidelines on qos, i.e best place to set up trusts, where to provide the qos, ie access / ditributio layer etc

2 REPLIES

Re: QOS design and best practices

fisrt for ur knowledge

trust always based on two layers L2 with COS and layer three with with IP precedence or DSCP

on access port that connect to ip phones for example make the trust on L2 on the uplink fron access to distribution layer and on the distribution uplink as well make it lyaer three trust dscp because if u keep it on layer two and the packet gos from layer two to three device it will loss its marking so make it on unlinks as lyaer three trust to keep ur marking end-to-end

once u trust the cos marking for exampe cisco ip phones bydefault mark the voice traffic with cos 5 and voice signaling traffic with cos 3 then u can match this traffic with a class map and give it spesific bandwidth through a policy-map

and the following link nice source

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_tech_note09186a0080883f9e.shtml

good luck

if helpful Rate

233
Views
0
Helpful
2
Replies