Allied Telesis AT-S29 - Manual (Page 49)

AT-S29 Management Software User’s Guide
49
Parameter Description
Type Shows port type as:
10/100TX:
10Base-T / 100Base-TX
100FX: 100Base-FX
1000SX: 1000Base-SX
1000LX: 1000Base-LX
Status Displays the current state of this port within the
spanning tree:
Disabled: Port has been disabled by the user or has
failed diagnostics
Blocked: Port receives STA configuration messages,
but does not forward packets.
Listening: Port will leave blocking state due to
topology change, starts transmitting configuration
messages, but does not yet forward packets.
Learning: Has transmitted configuration messages for
an interval set by the Forward Delay parameter
without receiving contradictory information. Port
address table is cleared, and the port begins learning
addresses.
Forwarding: The port forwards packets, and continues
learning addresses.
The rules defining port status are:
A port on a network segment with no other STA
compliant bridging device is always forwarding.
If two ports of a switch are connected to the same
segment and there is no other STA device attached to
this segment, the port with the smaller ID forwards
packets and the other is blocked.
All ports are blocked when the switch is booted, then
some of them change state to listening, to learning,
and then to forwarding.
Designated
Cost The cost for a packet to travel from this port to the root
in the current spanning tree configuration. The slower
the media, the higher the cost.
Designated
Bridge (ID) The priority and MAC address of the device through
which this port must communicate to reach the root of
the spanning tree.
Designated
Port (ID) The priority and port on the designated bridging
device through which this switch must communicate
with the root of the spanning tree.