MPLS TE auto tunnel mesh

[saif]

dears 

kindly, i know mpls auto tunnel mesh is used to automatic configured full mesh of mpls TE tunnel to aviod lack in transport label

which cause traffic block holes but how is configured & what is condition to implemnent that from from IOS point of veiw

[pman]

conditions:
- OSPF / ISIS as the IGP
- advertise loopback (/ 32) in IGP for all routers participating in Mesh membership, Each router should see the loopback of the other routers (Identify a block of addresses that you will reserve for mesh tunnel interfaces)

configuration example for all routers participating in Mesh membership:

mpls traffic-eng auto-tunnel mesh

router ospf 1

  mpls traffic-eng router-id Loopback0
  mpls traffic-eng area 0
  mpls traffic-eng mesh-group 10 Loopback0 area 0

interface Auto-Template100
  ip unnumbered Loopback0
  tunnel mode mpls traffic-eng
  tunnel destination mesh-group 10
  tunnel mpls traffic-eng autoroute announce
  tunnel mpls traffic-eng path-option 1 dynamic

Definition of AutoTunnel Mesh Groups You can see here:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_path_setup/configuration/15-mt/mp-te-path-setup-15-mt-book/mp-te-autotun-mesh.html