87Figure 34 Layer 3 remote port mirroring implementationThe source device does the following:3. Sends one copy of packets received on the source port Ethernet 1/0/1 to the tunnel interface(serving as the monitor port in the local mirroring group created on the source device)4. Forwards them to the tunnel interface on the destination device through the Generic RoutingEncapsulation (GRE) tunnel.The destination device does the following:5. Receives the mirrored packets from the tunnel interface (serving as the source port in the localmirroring group created on the destination device)6. Forwards the packets to the monitor port Ethernet 1/0/2 in the local mirroring group created onthe destination device.7. Forwards the packets to the data monitoring device through Ethernet 1/0/2.NOTE:For more information about GRE tunnels and tunnel interfaces, seeLayer 3—IP Services ConfigurationGuide.Configuring local port mirroringLocal port mirroring configuration task listConfigure a local mirroring group and then configure one or more source ports/CPUs and a monitorport for the local mirroring group.Complete these tasks to configure local port mirroring:Task RemarksCreating a local mirroring group RequiredConfiguring source ports for the local mirroring groupConfiguring source CPUs for the local mirroring groupPerform at lease one configuration.Configuring the monitor port for the local mirroring group Required
