Description: An entry in this table represents an MPLS tunnel. An entry can be created by a network administrator or by an SNMP agent as instructed by an MPLS signalling protocol. Whenever a new entry is created with mplsTETunnelIsIf set to true(1), then a corresponding entry is created in ifTable as well (see RFC 2863). The ifType of this entry is mplsTETunnel(150).A tunnel entry needs to be uniquely identified across a MPLS network. Indices mplsTETunnelIndex and mplsTETunnelInstance uniquely identify a tunnel on the LSR originating the tunnel. To uniquely identify a tunnel across an MPLS network requires index mplsTETunnelIngressLSRId. The last index mplsTETunnelEgressLSRId is useful in identifying all instances of a tunnel that terminate on the same egress LSR.