Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide ...

MRP 4vlan 1000tagged ethe 3/1End user side endpoint configuration[Global config]tag-type 9100 eth 3/1Router MPLSvpls vpls1000 1000vpls-peer 1.1.1.1vlan 100untagged ethe 3/1This configuration works in the following way:Packets will ingress the carrier endpoint with dual tags, both with tag-type 8100. The VLAN ID 1000will be stripped off the outer tag, and the inner tag customer VLAN ID 100 will be sent over theVPLS as payload. The packet will then egress the end user endpoint with a single tag-type 8100VLAN ID of 100.Packets will ingress the end user endpoint with a single VLAN tag, tag-type 8100, VLAN ID 100. Theport is configured with SAV tag-type 9100 and is also configured as untagged, so the packets willbe accepted and the VLAN ID 100 will be sent over the VPLS as payload. The packet will thenegress the carrier endpoint tagged interface, where it will add the outer tag with tag-type 8100VLAN ID 1000.MRPMetro Ring Protocol (MRP) is a proprietary protocol that prevents Layer 2 loops and provides fastreconvergence in Layer 2 ring topologies. MRP is especially useful in Metropolitan Area Networks(MANs), which typically require more flexibility than Spanning Tree Protocol (STP) can deliver.This section describes how to use debug commands to monitor MRP environments for the BrocadeNetIron XMR and Brocade MLX series routers.Using MRP diagnosticsWhen you enable MRP diagnostics, the software tracks Ring Health Packets (RHPs) according totheir sequence numbers, and calculates how long it takes an RHP to travel once through the entirering. When you display the diagnostics, the CLI shows the average round-trip time for the RHPs sentsince you enabled diagnostics. The calculated results have a granularity of 1 microsecond.Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide 8353-1002426-02