Understanding Policers with Link Aggregation Groups

If you apply a policer to a link aggregation group (LAG) on a standalone switch or QFabric node, the policer applies to all the interfaces in the LAG in aggregate. For example, if you configure a policer to rate-limit at 1 Gbps and apply the policer (by using a firewall filter) to a LAG that has two member interfaces on a single switch or node, the total allowed throughput for both members is 1 Gbps.

If you apply a policer to a LAG that has members on different nodes in a QFabric network Node group or redundant server Node group, the configured rate applies to the interface on each node. For example, if you configure a policer to rate-limit at 1 Gbps and apply the policer to a LAG that has one member on server node A and one member on server node B, the allowed throughput for each member is 1 Gbps, for a total allowed throughput of 2 Gbps.