Setting up LLQ QoS on my system

[jpopa]

We just installed a new VoIP system for our customer. I haven't personally done QoS before, but I know a bit about it. I do, however, have a few questions.

1) Can I set up the access lists for LLQ to be based on IP rather than port?

2) Is there any way on a Cisco switch(3650) to give priority to one vlan over another? Thanks

 

[KiscoKid]

1. Yes LLQ can match against source/destination IPs as opposed to ports. Note however that the 3560 doesn't utilise LLQ per se, it uses SRR (shaped round robin) and queue-assigned weights. The 3560 supports one priority queue whereby all traffic in that queue is serviced before all other queues.

2. Regarding how the 3560 classifies traffic, it can classify traffic at layer 2 or layer 3/4. It can either trust the incoming CoS, Precedence, DSCP bits and remap them if necessary or it can classify against MAC addresses (layer 2) or standard/extended ACLs (layer 3/4).

Hopefully the following will prove useful for setting up QoS on the 3560:

http://www.cisco.com/en/US/products...figuration_guide_chapter09186a00802b7caf.html