A tunnel needs to be uniquely identified across
an MPLS network. hwMplsTunnelStatisticsTunnelIndex
uniquely identifies a tunnel on the LSR originating
the tunnel. hwMplsTunnelStatisticsIngressLSRId uniquely
identifies a tunnel across an MPLS network. The last
index hwMplsTunnelStatisticsEgressLSRId is useful in
identifying all instances of a tunnel that are terminated
on the same egress LSR.
The indexes of this table are
hwMplsTunnelStatisticsTunnelIndex,
hwMplsTunnelStatisticsIngressLSRId and
hwMplsTunnelStatisticsEgressLSRId.