QoS - Nortel Option 11c thru 2811s

[drgebhardt]

Looking for config assistance on a couple of 2811s, connected via a T1 that will carry voice traffic between 2 Nortel Option 11c's.

Will 'auto qos voip trust' on the serial interfaces suffice?

Does a 'map' function need to be defined?

[paolo bevilacqua]

Hi,

if you only carry voice on the T1, you don't need to configure anything.

Else, the GW should be already be sending voice as DSCP EF (or configure media under DP), I would configure a simple service-policy with priority.

[drgebhardt]

I should have clarified. The T-1s will carry both data and voice. The phones themselves will be digital. Nortel classifies the IP connection between the Option 11c's as IP trunking.

With the above added, can anyone site a config example?

[paolo bevilacqua]

Hi, that is the minimal config to protect voice traffic:

class-map voice

match ip dscp ef

policy-map test

class voice

priority percent 50 <--- you are allocating no more than 768 Kbps to voice

interface serial X/Y

service policy output test

Hope this helps, please rate post if it does!

[drgebhardt]

That's the ticket!