variable "link_name" {
  description = "Short identifier for this inter-site segment, e.g. \"dc1-dc2\", \"dc1-office1\", \"dc2-office1\" (the D-100 dark-fiber triangle: mesh, not star)."
  type        = string
}

variable "mtu" {
  description = "Underlay MTU for this link. MUST be a Phase-0 measured value (D-102), never assumed jumbo. No default -- pass explicitly."
  type        = number
}