Juniper BGP - CONFIGURATION GUIDE V 11.1.X

Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with an IP or IPv6
Address
To discover the LSR in a point-to-point MPLS LSP, associated with an IP or IPv6 prefix,
that causes MPLS packets to be discarded owing to the size of the packet exceeding
the MTU size:
■ Issue the trace mpls ip command with the data-size keyword.
host1:pe1#trace mpls ip 192.168.25.1/32 data-size 60
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with an L3VPN
IP or IPv6 Prefix
To discover the LSR in a point-to-point MPLS LSP, associated with an L3VPN IP or
IPv6 prefix, that causes MPLS packets to be discarded owing to the size of the packet
exceeding the MTU size:
■ Issue the trace mpls l3vpn command with the data-size keyword.
host1:pe1#trace mpls l3vpn vrf pe11 10.2.3.21/32 data-size 60
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with a Martini
Circuit
To discover the LSR in a point-to-point MPLS LSP, associated with a Martini circuit,
that causes MPLS packets to be discarded owing to the size of the packet exceeding
the MTU size:
■ Issue the trace mpls l2transport command with the data-size keyword.
host1:pe1#trace mpls l2transport FastEthernet1/0.1 data-size 60
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with an RSVP-TE
Tunnel
To discover the LSR in a point-to-point MPLS LSP, associated with an RSVP-TE tunnel,
that causes MPLS packets to be discarded owing to the size of the packet exceeding
the MTU size:
■ Issue the trace mpls rsvp tunnel command with the data-size keyword.
host1:pe1#trace mpls rsvp tunnel west1 data-size 60
Troubleshooting MTU Problems in a Point-to-Point MPLS LSP Associated with an IP or IPv6 Address ■ 377
Chapter 4: Monitoring MPLS