You can run the tracert command to obtain information about the SPEs and Ps through which packets pass from the source to the destination. Based on the command output, you can monitor PW connectivity and locate faulty nodes.
After you configure a virtual private LAN service (VPLS) network, use customer edge (CE) ping to monitor the connectivity between a provider edge (PE) and a CE on the VPLS network.
After configuring a Bridge Domain (BD), you can use CE ping to check the connectivity between a PE and a CE in an Ethernet Virtual Connection (EVC) model.