This carries the human-readable name of the transit LSP that triggered the notification, letting the admin recognize which cross-network path is affected without decoding a bare tunnel index during a fast-moving incident. Because transit tunnels are often named after the head-end service they carry, this field lets an admin quickly judge business impact from the trap alone. For example, a transit tunnel named backbone-lsp-nyc-chi-03 flagged in an alert immediately tells the admin which regional backbone segment needs attention.