This task says that we need to make sure that all the ports in VLAN12 combined together should not exceed 3Mps traffic.
The P.G. Guide has a solution that uses aggregate policer in a policy map and applies it to both the ports that are in VLAN 12. The Cisco command reference says that aggregate policer is shared among multiple traffic classes in the same policy map and can not police traffic across different interfaces. In that case this solution is not accurate because aggregate policer is actually shared on a per interface basis with the classes of a police map applied to a given interface. It never polices traffic across interfaces. thanks Suresh
