This object indicates the role or state of a REP port depending
on its link status and whether it is forwarding or blocking
traffic.
'failedPort' - a port with a non-operational link status,
such that no traffic is forwarded on it.
'alternatePort' - a port forwarding traffic only for a subset of
VLANs, for the purpose of VLAN load balancing.
'openPort' - a port forwarding traffic for all VLANs.
'failedPortNoNeighbor' - a port with a non-operational link
status and does not have a external
neighbor.
'failedPortLogicalOpen' - a port with a non-operational link
status and does not have a external
neighbor but is in forwarding state
for traffic.