Layer 2 VPN Monitoring and Troubleshooting

Table 52 summarizes the command-line interface (CLI) commands you can use to monitor Layer 2 Virtual Private Networks (VPNs). In the table, the commands are grouped by functionality. In the remainder of this chapter, they are explained alphabetically.

These commands have been condensed and grouped to specifically address VPNs, with references to the complete command elsewhere in this book.

Table 52: Commands for Monitoring Layer 2 VPNs

Task Category	Task or Information to Monitor	Command
BGP Information	Entries in the BGP neighbor database	show bgp neighbor
	BGP summary information.	show bgp summary
Interface Information	General interface information.	show interfaces terse
Layer 2 Connections	Display Layer 2 virtual circuit information.	show l2circuit connections
	Display Layer 2 VPN information.	show l2vpn connections
VPLS Connections	Display VPLS information.	show vpls connections
Routing Table Information	Information about the entries in the routing tables.	show route
	Routes transmitted by a particular routing protocol.	show route advertising-protocol
	Information about the entries in the kernel's forwarding table.	show route forwarding-table
	Route instance information.	show route instance
	Routes learned by the specified protocol.	show route protocol
	Routes received by a particular routing protocol.	show route receive-protocol
	Routes in a particular routing table.	show route table