cisco qos

[mikeg001]

I currently have cisco 2950 switches ans using asterisk with polycom and aastra sip phones i have tried just a few things on our switches enabling qos how ever i think i am failing. We are getting very choppy calls during busy periods of the day.

What settings should my ports be set at for qos?

thanks!!

 

[edicted]

I would start here:

http://www.cisco.com/en/US/tech/tk389/tk813/technologies_q_and_a_item09186a00804976d3.shtml

And also check this out:

http://www.cisco.com/en/US/docs/swi...se/12.1_22_ea2/configuration/guide/swqos.html

We have a large VoIP deployment and are using 6500 switches with Avaya phones.

Each of our switch ports looks like this:

interface GigabitEthernetx/x
switchport
switchport 'DATA' vlan xxx
switchport 'VOIP' vlan xxx
no ip address
speed 100
duplex full
mls qos trust dscp
spanning-tree portfast

 

[mikeg001]

how does the switch understand what vlan to use?

 

[edicted]

You have to define the VLANs first, then assign the VLAN numbers for voice and data under each switch port

 

[mikeg001]

So once i set the ports on my switch there is nothing i need to do on the phones? what about the port that my asterisk system plugs into should i override its cos?

 

[MorfiusX]

The 2950 doesn't support the full QoS spec. It only support CoS:
http://www.cisco.com/en/US/tech/tk389/tk813/technologies_q_and_a_item09186a00804976d3.shtml

 

[edicted]

You may need to get a hold of a manual for those devices and see what is recommended. Unless you are going to setup each phone by hand there maybe some DHCP optioning that needs to be done to tell the phones specific config. info.

 

[mikeg001]

I can assign vlans to the phones. we use polycom and aastra but what about the pc plugged into the pc side of the phone.