ethLanPortStpPortRole

Port Roles are assigned according to whether the port is to be part
of the active topology connecting the Bridge to the Root Bridge
(a Root Port) or connecting a LAN through the Bridge to the Root
Bridge (a Designated Port), or is an Alternate or Backup Port that
may provide connectivity if other Bridges, Bridge Ports, or LANs
fail or are removed.
  - ROOT. The Bridge Port on each Bridge receiving the frames on
    the least cost path from the Root Bridge is assigned the role
    of Root Port for that Bridge (the Root Bridge does not have a
    Root Port).
  - DESIGNATED. The Bridge Port on the Designated Bridge that is
    connected to the LAN is assigned the role of Designated Port
    for that LAN.
  - ALTERNATE. An Alternate Port offers an alternate path in the
    direction of the Root Bridge to that provided by the Bridge's
    own Root Port, whereas a Backup Port acts as a backup for the
    path provided by a Designated Port in the direction of the
    leaves of the Spanning Tree.
  - BACKUP. Backup Ports exist only where there are two or more
    connections from a given Bridge to a given LAN; hence, they
    (and the Designated Ports that they back up) can only exist
    where two ports are connected together in loopback by a point
    to point link, or where the Bridge has two or more connections
    to a shared media LAN segment.

MIB

ALFOPLUS-SIAE-MIB

OID

.1.3.6.1.4.1.3373.25.25.2.1.25

Type

column

Access

readonly

Status

current

Parent

ethLanPortRecord