The human-readable name of the interface identified by the accompanying fwIfIndex. This makes the per-interface counter rows actually usable during an incident, since matching an alert to a named interface like an external Ethernet leg is immediately actionable in a way that a bare numeric ifIndex isn't for someone not staring at the interface table simultaneously. Example: an alert citing elevated drops on a named external interface tells the on-call engineer immediately to focus on the internet-facing leg, not the internal network.