This provides the human-readable name of the tunnel currently active for decapsulating inbound traffic in the referenced group, the receive-side counterpart to the active encap tunnel name. It lets an admin see directly in a trap or log that, say, 'DECAP-PATH-B is now active,' without decoding a numeric tunnel index. This is especially useful when troubleshooting one-way traffic problems, since it isolates which physical/logical path is currently handling the inbound leg.