Gramzster
Click, Click
join:2002-07-02
London, ON
| [Config] Question about QoS Priority and Policing
Hey Everyone,
I have a QoS policy in place for our telecommuters, who have Cisco 871 routers and a 10/1 broadband connection. I have given priority to the Voice traffic and have everything shaped to 1000kbps to ensure that the speed-limiting of the broadband modem does not affect voice traffic. (speed tests have determined that all telecommuters can upload at least 1000kbps).
Everything works great, except for one thing: While developing the QoS policy, I enabled policing of class-default traffic to ensure there would always be bandwidth available for VoIP traffic. The Catch is that when a call is NOT being made, that remaining 250kbps remains unused due to the policing of 750kbps.
As I don't have the ability to fully saturate the upload portion of the broadband connection, if I were to remove the polcing, will the fair-queue and ramdom-detect still make sure that the VoIP traffic gets priority, yet allow all the bandwidth be used for applications when calls are being made?
Thanks!
|
|
cooldude9919
join:2000-05-29
Cape Girardeau, MO
clubs:
1 edit | I think you should be ok with taking out the police command and just give it a bandwidth statement(or not if you want no guaranteed minimum for class-default). With the tiered service-policy setup any one class should be able to use another classes bandwidth when there is free bandwidth, but when congestion occurs then every classs gets a miniumum equal to their bandwidth statement. Here is some of my qos setup.
It seems you also have the voice being priortiy which is good. I would give yourself some overhead because in every service i have messed with (cable/dsl/t1) you always get excess latency whenever you get at your max speed, which is why i limit it to 85% of the interface bandwidth. You could probably go up to 90% or 95% depending on the circuit. |
|
Gramzster
Click, Click
join:2002-07-02
London, ON
| Thanks a lot cooldude9919
Well, I've removed the policing commands and so far so good.
I actually remembered that I had a method of fully saturating my upload. I got a friend to watch my slingbox (which pretty much sucks every last kilobit of upload available if need be) and so far so good.
I modified the configs on the telecommuter routers. Worst case scenario, if they have call problems, I can easily revert it back.
Thanks again! |
|
