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Checklist for Checking the Data Link Layer



Description: This checklist provides the steps and commands for investigating a problem at the data link layer of the Multiprotocol Label Switching (MPLS) network. The checklist provides links to an overview of the data link layer and more detailed information about the commands used to investigate the problem.


Table 1 provides commands for checking the data link layer.

Table 1: Checklist for Checking the Data Link Layer


Command or Action

Checking the Data Link Layer 
  1. Verify the LSP

show mpls lsp extensive

  1. Verify Interfaces

show interfaces type-fpc/pic/port extensive

show interfaces type-fpc/pic/port

  1. Take Appropriate Action

The following sequence of commands addresses the specific problem described in this topic:

[edit interfaces type-fpc/pic/port]


delete encapsulation



  1. Verify the LSP Again

show mpls lsp extensive