DSCP Marking

[Travis Knabe]

First post... sorry if I'm in the wrong spot.

I have multiple sites on a Sprint MPLS network.  They're handling QOS on their network and have given me DSCP numbers to use for QOS.

I'd like to tag packets based on their destination IP.

For example:

Subnet in branch office = 192.168.20.2/24

IP Address of Intranet Web Server in home office = 192.168.40.40

I'd like to tag all packets leaving the branch office router with DSCP # 37 only if the packet is heading towards 192.168.40.40

So those packets will be protected on the Sprint backbone

Then on the home office router I'll want to protect the return packets.  This side seems easier, can do something like this:

access-list 1 permit 192.168.40.40 255.255.255.255

class-map match-all subnet1
 match access-group 1

policy-map prioritize_subnets
 class subnet1
  set dscp 37

interface fastethernet 0/1
 service-policy input prioritize_subnets

Am I on the right track??

[Jon Marshall]

Travis

Yes you are on the right track although generally you add the service policy outbound on the WAN interface of the router.

For the branch office simply use an extended acl ie.

access-list 101 permit ip 192.168.20.0 255.255.255.0 host 192.168.40.40

Jon