Optimize network for VOIP

RouterOS Wireless Networking
1

Can I ask to Optimize network for VOIP has every device in the network chain be configured ?
ie CPE - AP - PTP - Core ,etc

Qos is mentioned in a lot in posts how is it enabled


n21roadie

2

activate WMM at AP and CPE and use voice priority.. its a layer 2 QoS

3

activate WMM at AP and CPE and use voice priority.. its a layer 2 QoS

4

imho there are a lot of ways of making a voip-suitable network:
VoIP requires low latency and low jitter to work properly. Too many NATs might be a problem too.
Starting from the bottom, Ensure you have a good latency from CPE to Core without any load (it should be 3ms * number of hops to be reasonable [but you can have better results])
Try to put some load until the latency grows too much. You will find your bottleneck, fix it and retry. If you cant get better result, that will be your max-limit for your future L3 QoS.
Keep your APs healthy, do not overcrow the radios with users and avoid bad links. I suggest to use 4.x wireless nstreme that helps you keeping low latency and allows you to go to 40 users per radio without big issues.
Once you got your max-limit (testing the latency on traffic load) you can set up a QoS on the edges (Core and CPE) to shape and priorize the traffic you need (aka VoIP)
Do not think QoS is the magic word to fix everything and make VoIP work.. If your network isn’t healty, QoS can’t do miracles.

5

VoIP requires low latency and low jitter to work properly. Too many NATs might be a problem too.

At present most of the network is routed with only a bridge used on 493ah to combine ap’s and routing to ap’s , pppoe for clients, nat used only at dsl load balancer and cpe, is routing good/bad for low latency and low jitter.

Try to put some load until the latency grows too much. You will find your bottleneck, fix it and retry. If you cant get better result, that will be your max-limit for your future L3 QoS.



activate WMM at AP and CPE and use voice priority.. its a layer 2 QoS

Can someone explain Layer2 / Layer3 QoS ?

6

Routing is good for latency as long as your routers aren’t overloaded, But you should remove the NAT at CPE for VoIP devices to make only one NAT at gateway. (I’m not saying that double NAT isn’t possible, it just makes things harder to work)

Layer2/Layer3 QoS means on which level the QoS is done (Link Level (L2) or IP level (L3))
See also: http://en.wikipedia.org/wiki/OSI_model

7

Advice please or working example of how i would implement WMM at AP + CPE, was reading http://wiki.mikrotik.com/wiki/WMM But unsure how to configure on PPPoE connection?