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Troubleshooting Any Transport over MPLS Based VPNs

Sample Chapter is provided courtesy of Cisco Press.
Date: Jun 10, 2005.

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Chapter Information

Technical Overview
Configuring MPLS VPNs
Configuring MVPNs
Configuring TE Tunnels to Carry MPLS VPN Traffic
Troubleshooting MPLS VPNs
Case Studies
Additional Troubleshooting Commands
show and debug Command Summary
Review Questions
MPLS VPN Troubleshooting Practice Labs

Chapter Description

MPLS Layer 3 VPNs allow a service provider to provision IP connectivity for multiple customers over a shared IP backbone, while maintaining complete logical separation of customer traffic and routing information. Learn more about MPLS Layer 3 VPNs in this sample chapter from Cisco.

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Troubleshooting Virtual Private Networks (VPN)

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show and debug Command Summary

Table 6-2 summarizes show and debug commands used to troubleshoot MPLS in this chapter. Note that where appropriate, the equivalent old-style TDP command structure is shown.

Table 6-2show and debug Command Summary

Command	Parameter	Description
show ip cef	<none>	Displays the CEF FIB
	summary	Displays a summary of the CEF FIB
	vrf vrf_name detail	Shows detailed information about entries in the VRF CEF FIB
show cef	interface	Shows interface CEF information
show adjacency	detail	Displays detailed CEF adjacency table information
show atm vc	<none>	Shows all ATM PVCs, SVCs, and LVCs
show mpls (show tag-switching)	interfaces	Displays information about interfaces configured for MPLS
	interfaces detail	Displays detailed information about interfaces configured for MPLS
	forwarding-table	Displays the LFIB
	forwarding-table prefix detail	Displays detailed information about a prefix in the LFIB
	forwarding-table labels label_value	Shows LFIB entry that contains the specified local label
		continues
	forwarding-table labels label_value detail	Shows detailed information about LFIB entry that contains the specified local label
show mpls ldp (show tag-switching tdp)	discovery	Shows information about LDP neighbor discovery
	neighbor	Shows information about LDP sessions
	bindings	Displays the LIB
	parameters	Shows configured LDP parameters
show mpls atm-ldp (show tag-switching atm-tdp)	capability	Shows LDP parameters negotiated on LC-ATM interfaces
show ip vrf	interfaces	Displays information about VRF interfaces
	detail vrf_name	Displays detailed information about VRF interfaces
show ip protocols	vrf vrf_name	Shows routing protocol information for a specified VRF
show ip route	vrf vrf_name	Shows the VRF routing table
show ip rip database	vrf vrf_name	Shows the RIP database for a specified VRF
show ip eigrp vrf vrf_name	interfaces	Shows EIGRP interface information for a specified VRF
	neighbors	Shows EIGRP neighbor information for a specified VRF
	topology	Displays the EIGRP topology table for the specified VRF
	traffic	Shows EIGRP traffic information for the specified VRF
show ip bgp vpnv4 vrf vrf_name	<none>	Shows the (VPN-IPv4 address family) BGP table for the specified VRF
	labels	Shows labels associated with VPN-IPv4 prefixes for a specified VRF
show ip pim mdt bgp	<none>	Shows information about MP-BGP neighbors advertising participation in MVPNs
debug mpls (debug tag-switching)	atm-ldp api (atm-tdp api)	Shows information about LVCs
	ldp transport events (tdp transport events)	Shows information concerning LDP neighbor discovery
	ldp messages (tdp pies sent)	Displays information concerning LDP messages sent to and from the LSR
	ldp advertisements (tdp advertisements)	Shows information concerning the advertisement of labels and interface addresses
	ldp bindings (tdp bindings)	Displays information about label bindings and addresses received from peer LDP LSRs

9. Review Questions | Next Section Previous Section

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