xconnect not up, please help

[xuancuong1188]

dear all,

i am configuring l2vpn between PEs using xconnect, but i have some problems. please help me

show xconnect all

Legend:    XC ST=Xconnect State  S1=Segment1 State  S2=Segment2 State

  UP=Up       DN=Down            AD=Admin Down      IA=Inactive

  SB=Standby  HS=Hot Standby     RV=Recovering      NH=No Hardware

XC ST  Segment 1                         S1 Segment 2                         S2

------+---------------------------------+--+---------------------------------+--

DN pri ac   Gi1/1.3031:3031(Eth VLAN)    UP mpls x.x.x.1:3031          DN

IA sec ac   Gi1/1.3031:3031(Eth VLAN)    UP mpls x.x.x.2:3031          DN

i don't know why the xc down

Local interface: Gi1/1.3031 up, line protocol up, Eth VLAN 3031 up

  Destination address: x.x.x.2, VC ID: 3031, VC status: down

    Output interface: none, imposed label stack {}

    Preferred path: not configured 

    Default path: no route

    No adjacency

  Create time: 14:06:24, last status change time: 00:00:32

  Signaling protocol: LDP, peer x.x.x.2 : 0 up

    Targeted Hello: x.x.x.x (LDP Id) -> x.x.x.2, LDP is UP

    Status TLV support (local/remote)   : enabled/not supported

      LDP route watch                   : enabled

      Label/status state machine        : activating, LruRru

      Last local dataplane   status rcvd: No fault

      Last local SSS circuit status rcvd: No fault

      Last local SSS circuit status sent: No fault

      Last local  LDP TLV    status sent: No fault

      Last remote LDP TLV    status rcvd: Not sent

      Last remote LDP ADJ    status rcvd: No fault

    MPLS VC labels: local 3275, remote 392640

    Group ID: local 0, remote 0

    MTU: local 1500, remote 1500

    Remote interface description:

    Remote VLAN id: 3031

    MAC Withdraw: sent:4, received:0

  Sequencing: receive disabled, send disabled

  Control Word: Off (configured: autosense)

  VC statistics:

    transit packet totals: receive 0, send 0

    transit byte totals:   receive 0, send 0

    transit packet drops:  receive 0, seq error 0, send 0

- ldp established with the other PE.

interface GigabitEthernet1/1.3031

encapsulation dot1Q 3031

xconnect x.x.x.2 3031 encapsulation mpls pw-class aaata

  backup peer x.x.x.x 3031 pw-class aaata

i'm appreciate for your help

[Nagendra Kumar Nainar]

Hi,

Can you check if you have mpls enabled on egress interface to reach PW destination address? (x.x.x.2 from "

xconnect x.x.x.2 3031 encapsulation mpls pw-class aaata")

Checked show ip cef "PW destination" address and see if it have any label (eitehr null label or non-null label), but it should not be Unlabelled.

HTH,

Nagendra

[xuancuong1188]

thank for you reply

show ip cef x.x.x.2

x.x.x.2/32

  nexthop a TenGigabitEthernet8/3

  nexthop b TenGigabitEthernet8/1

  nexthop c TenGigabitEthernet8/2

i don't see any label here

i have enabled on that interface

TenGigabitEthernet8/3

mpls ip

TenGigabitEthernet8/1

mpls ip

...

[Nagendra Kumar Nainar]

Hi,

When the PW destination is unlabelled in local router, xconect will not come up.

Check  if you have LDP session up with the nexthop on the egress interface.  Try "show mpls ldp neighbor ".

Check if you mpls ldp enabled on nexthop routers.

-Nagendra

[Mohammed Imran Khan]

Hi,

I see that the core interface is TenGigabitEthernet8/x. Can you please confirm what kind of line card is module 8.

Regards,

Imran

[Vishnu Vardhan S]

Enable the MPLS IP command in global and interface level.