We are planing to implement the WAN QoS polic to apply on the routers for sites. They all are connected to our service provider via MPLS. We will make policy for voice, video and data. We have Cisco VoIP phones and some other equipments for voice, and have Polycom for video conferencing. There are 5 classes, one class will be configured for voice traffic and one class will be configured for video conferencing. For video conferencing, we are using ACL. We don't want the voice traffic from video conferencing falling into the voice class. My question is how to distinguish between voice traffic for VoIP phone, Polycom' video and voice for video traffic. Another question is it will be covered all voice traffic when using "match protocol RTP" Please advise.
First of all you usually have a policy map to mark on the inbound LAN interface and then a policy on the outbound to set your percentages.
so lets say
Class-map match-any MARK_EF
Match access-group name MARK_EF
Class-map match-any MARK_AF41
Match access-group name MARK_AF41
Class-map match-any MARK_AF31
Match access-group name MARK_AF31
set ip dscp ef
set ip dscp af41
set ip dscp af31
set ip dscp default
ip access-list extended MARK_AF41 (Sample acl, this matches any dscp41,42,43,cs3 and telnet and resets to af41)
permit ip any any dscp af41
permit ip any any dscp af42
permit ip any any dscp af43
permit ip any any dscp cs3
permit tcp any any eq telnet
permit tcp any eq telnet any
Then something like this outbound, wred is optional.
class-map match-any COS-EF
match dscp ef
class-map match-any COS-AF41
match dscp af41
class-map match-any COS-AF31
match dscp af31
bandwidth remaining percent 40
bandwidth remaining percent 39
bandwidth remaining percent 21
I believe in the polycom set up you can set your dscp for the voice and video to whatever you want, so if you set it to 41, then you could match on that or you could match on source ip address etc, just put it in acl. I'm also not sure if you need to match on protocol rtp as most phones set dscp to ef so just match on dscp EF. Which actually brings me to a question I have, is there any benefit to setting 2 classes with almost the same bandwidth? I'm about to post that.
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