Tracing the Path of an MPLS Echo Request Packet to an L3VPN IP or IPv6 Prefix
To send MPLS echo request packets to discover and examine the path MPLS packets
follow to the L3VPN IP or IPv6 prefix:
â– Issue the trace mpls l3vpn command.
host1:pe1#trace mpls l3vpn vrf pe11 10.2.3.21/32
Sending an MPLS Echo Request Packet to an RSVP-TE Tunnel
To send an MPLS echo request packet to the specified RSVP-TE tunnel:
â– Issue the ping mpls rsvp command.
host1:pe1#ping mpls rsvp tunnel west1
Tracing the Path of an MPLS Echo Request Packet to an RSVP-TE Tunnel
To send MPLS echo request packets to discover and examine the path MPLS packets
follow to the specified RSVP-TE tunnel:
â– Issue the trace mpls rsvp tunnel command.
host1:pe1:pe11#trace mpls rsvp tunnel west1 detail
Sending an MPLS Echo Request Packet to a VPLS Instance
To send an MPLS echo request packet to the specified VPLS instance:
â– Issue the ping mpls vpls command.
host1:pe1#ping mpls vpls vrf pe11 vplsA remote-site-id 2
Tracing the Path of an MPLS Echo Request Packet to a VPLS Instance
To send MPLS echo request packets to discover and examine the path MPLS packets
follow to the specified VPLS instance:
â– Issue the trace mpls vpls command.
host1:pe1#trace mpls vpls vrf pe11 vplsA remote-site-id 2 detail
Packet Flow Examples for Verifying MPLS Connectivity
Figure 67 on page 370 shows a sample IPv4/IPv6 L3VPN topology with LDP or RSVP-TE
base tunnels. Two base tunnels (one in each direction) are present between 10.1.1.1
and 10.2.2.2. The packet flow examples that follow refer to this sample topology.
Tracing the Path of an MPLS Echo Request Packet to an L3VPN IP or IPv6 Prefix â– 369
Chapter 4: Monitoring MPLS
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