The policy map you have posted is part of setup that can be used to prioritise voice traffic.
While the policy is called Outboundpolicy, it would be more useful at the ingress point of a switch. However, it can be used on the egress interface of a switch. The policy does the following:
- recognises RTP (voice payload) traffic and marks it with a CoS of 5. It does not mark the IP precedence value of the packet, however. The following statement could be added to do so: set ip precedence 5
- recognises voice signaling traffic and marks it with a Cos of 3 and an ip precedence of 3. In fact, it's only matching on H.323 which uses tcp port 1720
- everything else is marked with a CoS of 0. Once again, IP precedence should also be marked to 0 here.
And just to add to the previous comments, the policy will mark your traffic at the edge of your network and will be applied as an input policy map to your interfrace. Going out towards your core, you need to prioritise the traffic using another policy map which will be applied in the oubound direction, using the priority command for your voice traffic.
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