# Monitoring Layer 2 Services over MPLS

This chapter describes the commands you can use to monitor and troubleshoot layer 2 services over MPLS on E Series routers.

| Note: The E120 and E320 Broadband Services Routers output for monitor and show commands is identical to output from other E Series routers, except that the E120 and E320 router output also includes information about the adapter identifier in the interface specifier (slot/adapter/port).

This chapter contains the following sections:

- Setting Baselines for Layer 2 Services over MPLS Statistics
- Monitoring ATM Martini Cell Packing Timers for Layer 2 Services over MPLS
- Monitoring ATM Subinterfaces for Layer 2 Services over MPLS
- Monitoring ATM Cross-Connects for Layer 2 Services over MPLS
- Monitoring MPLS Forwarding for Layer 2 Services over MPLS
- Monitoring MPLS Layer 2 Interfaces for Layer 2 Services over MPLS