mplex
join:2004-04-15
Charleston, SC
| reply to Sameer
Re: VoIP issues with my Cisco 831. (torrents & pulsing voice)
Add this policy and use it as the outgoing policy on the wan ethernet interface:
policy-map MyQosPolicy-Parent
class class-default
shape average 330000 !! I use this for my 384k uplink
service-policy MyQosPolicy
This will prioritize the traffic under the MyQosPolicy policy at the specified rate. You can not use 384000 since you have to account for docsis overhead and bad cable service. Play with this number if you want, but always start low and increase it. If you go over, QoS will fail. |
mplex
join:2004-04-15
Charleston, SC
| Sorry for the quick follow-up, but I saw that you misconfigured your original policy-map. First of all, there is only one priority queue no matter how you configure it, so I would combine the VoIP and sip classes in to one class. Also, I would switch to percentages but that is a personal thing. If I was writing this policy map, I would do this:
policy-map MyQoSPolicy
class VoIP
set dscp ef
priority percent 50
class normal_traffic
bandwidth percent 20
class warcraft
bandwidth percent 20
class class-default
bandwidth percent 10
For class-default, you can not combine bandwidth with fair-queue, and the way the algorithm works can completely starve that class down to nothing. This is a better configuration IMO. Also, for VOIP, throw the sip classification in with the other VOIP class.
Don't forget to combine the parent policy in my last post to wrap this policy in a rate limiter.
Good luck. |
