Packet Flows To L3Vpn Ipv6 Prefixes; Troubleshooting Mtu Problems In Point-To-Point Lsps - Juniper BGP - CONFIGURATION GUIDE V 11.1.X Configuration Manual

JUNOSe 11.1.x BGP and MPLS Configuration Guide
topology, this behavior might result in premature termination of the ping or trace.
You can use the bottom-label-ttl keyword to avoid this problem.

Packet Flows to L3VPN IPv6 Prefixes

Packet flow for an MPLS ping and trace to an L3VPN IPv6 prefix is the same as for
an IPv4 prefix except that the echo request packets and echo reply packets contain
the VPN IPv6 sub-TLV instead of the VPN IPv4 sub-TLV.
Related Topics

Troubleshooting MTU Problems in Point-to-Point LSPs

In an MPLS-enabled network with point-to-point LSPs, you can use the data-size
keyword with the ping mpls command to detect MTU failures in different types of
MPLS applications and network topologies. You can use the data-size keyword to
troubleshoot MTU problems in point-to-point MPLS LSPs to determine whether MPLS
packets with a particular size can be forwarded over an MPLS point-to-point LSP,
when the size of the packets exceeds the MTU size at any of the LSRs that are nodes
of the LSP. If you specify the packet size for MPLS echo requests, you can determine
the exact LSR where the MTU size is exceeded and the MPLS packets are discarded.
Tasks to verify and troubleshoot MTU problems in point-to-point LSPs are:
376
Troubleshooting MTU Problems in Point-to-Point LSPs
Verifying and Troubleshooting MPLS Connectivity on page 367
ping mpls ip
ping mpls l2transport
ping mpls l3vpn
ping mpls rsvp tunnel
ping mpls vpls
trace mpls ip
trace mpls l2transport
trace mpls l3vpn
trace mpls rsvp tunnel
trace mpls vpls
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with
an IP or IPv6 Address on page 377
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with
an L3VPN IP or IPv6 Prefix on page 377
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with a
Martini Circuit on page 377
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with
an RSVP-TE Tunnel on page 377
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with a
VPLS Instance on page 378