Configure QoS on C3 SecureStack to prioritize video/voice traffic.

[Joshua_Sanders]

I have a DR site connected to my corporate office. The DR site is using a older C3G Securestack. The corporate office is using a N7 switch with platinum DFEs.

My question is how do I configure QoS. The config guide and feature guide on the Extreme website might as well be in ancient Babylonian. It doesn't make any sense to me. All I'm trying to do is ensure VoIP traffic and my video conference system gets first priority. If the video conference system is tagging packets as EF, why can't I just create an access-list in the (router) like this and assign it to a vlan interface.

access-list 100 permit ip any any dscp ef assign-queue 5
access-list 100 permit ip any any assign-queue 4

I this should work but I never lose my jitter on the video system and the Enterasys documentation doesn't ever seem to offer this as an example.

[Joshua_Sanders]

The endpoints are marking them with dscp values. My cisco routers are identifying the dscp headers and prioritizing as appropriate to their value.

[Curtis_Parish]

How are you identifying the voice packets when they leave the C3 and hit the cisco router?

[Joshua_Sanders]

I am routing on the C3. core, distribution & access are all collapsed on this C3 (it's a small site).

[Curtis_Parish]

Are you routing on the C3? IPsec itself adds delay because it requires CPU cycles on the router. (unless you running some sort off offload.) Are you giving your voice packets priority in the IPSec queue?

On the C3 you are able to assign priority based on VLAN but once that packet leaves the C3 you have to identify voice packets another way like with DiffServ.

[Joshua_Sanders]

Well I'm double checking my cisco routers that connect the two sites to verify the config but shouldn't there be some sort of prioritization that happens at layer 3 on the C series. The voice traffic is on 1 VLAN and the subnet that the router is connected to is on another VLAN.