Cisco Cisco IOS Software Release 12.2(33)SRE

    Tunnel label: 3, next hop point2point

    Output interface: Tu1, imposed label stack {17 16}

  Create time: 00:27:31, last status change time: 00:27:31

  Signaling protocol: LDP, peer 10.16.16.16:0 up

    MPLS VC labels: local 25, remote 16

    Group ID: local 0, remote 6

    MTU: local 1500, remote 1500

    Remote interface description:

  Sequencing: receive disabled, send disabled

  VC statistics:

    packet totals: receive 10, send 10

    byte totals:   receive 1260, send 1300

    packet drops:  receive 0, send 0

Local interface: AT1/0/0 up, line protocol up, ATM AAL5 0/50 up

  Destination address: 10.16.16.16, VC ID: 150, VC status: up

    Preferred path: 10.18.18.18, active

    Default path: ready

    Tunnel label: 3, next hop point2point

    Output interface: Tu2, imposed label stack {18 24}

  Create time: 00:15:08, last status change time: 00:07:37

  Signaling protocol: LDP, peer 10.16.16.16:0 up

    MPLS VC labels: local 26, remote 24

    Group ID: local 2, remote 0

    MTU: local 4470, remote 4470

    Remote interface description:

  Sequencing: receive disabled, send disabled

  VC statistics:

    packet totals: receive 0, send 0

    byte totals:   receive 0, send 0

    packet drops:  receive 0, send 0

You can use the debug mpls l2transport vc event command to troubleshoot tunnel selection. For 
example, if the tunnel interface that is used for the preferred path is shut down, the default path is 
enabled. The debug mpls l2transport vc event command provides the following output:

AToM SMGR [10.2.2.2, 101]: Processing imposition update, vc_handle 62091860, update_action 

3, remote_vc_label 16 

AToM SMGR [10.2.2.2, 101]: selected route no parent rewrite: tunnel not up 

AToM SMGR [10.2.2.2, 101]: Imposition Programmed, Output Interface: Et3/2 

The following sections provide references related to the Any Transport over MPLS: Tunnel Selection 
feature.

Any Transport over MPLS for the Cisco 7600 series 
routers

,

Release 12.2SX