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Show Port - Option 4
Displays the STP status of the port. The screen below shows a bridge that is not the Root:
Port Status
Bridge ID
:
Port ID :
0x8001
Port state
:
Path cost
:
Designated Root
Designated bridge
Designated port
Designated cost
Topology change acknowledged
Type: [s] to redraw, [=] main menu, any other key to end.
In the above display, the parameters not discussed previously are the relationships between Designated bridge,
Designated port, and Designated cost.
EXAMPLES:
Refer to the "STP Sample Topology" when reviewing the following material:
Designated bridge
This indicates the bridge in the forwarding state, perhaps winning an STP redundant bridge case (but not
necessarily in that situation), receiving protocol messages for/from the Root bridge coming from/to the LAN X
indicated in the Port Status display.
0000d0006005) matches the MAC address for this bridge, then this bridge is the Designated bridge for LAN
X.
Designated port
The Designated port is attached to the Designated bridge for the LAN. It is the port attached to the LAN
which receives messages for/from the Root bridge coming from/to the attached LAN.
Designated cost
This value indicates the total path cost to reach the LAN that the Root bridge is attached to. For the Root
bridge's Designated port, the cost is 0. The cost increases as each additional LAN is crossed according to the
path cost of each Designated bridge's Designated port. Note that a Root port does not have a Designated cost.
When displaying the Port Status of a Root port attached to a LAN, the Designated port (and the designated
cost) for this LAN is found on another bridge.
32768-0000d0006005
Forward
100
:
32768-0000d000e034
:
32768-0000d0006005
:
0x8002
:
100
:
0
If the designated bridge's MAC address (here shown as 32768-
DI-1135 X.25 Bridge/Router Menu Reference Manual
X.25 Menus: LAN Port Menu
51
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