Displaying The Spanning Tree Port State - Alcatel OMNISTACK 8008 User Manual

Console Interface

Displaying the Spanning Tree Port State

The parameters shown in the following figure and table are for port STA Information.
Port Type
----------------------------------------------------------------------
1 1000SX
2 1000SX
3 1000SX
4 1000SX
5 1000SX
6 1000SX
7 1000SX
8 1000SX
Use <TAB> or arrow keys to move. <Enter> to select.
Parameter
Type
Status
Designated Cost
Designated
Bridge (ID)
Designated Port
(ID)
2-32
Alcatel OmniStack 8008
< Spanning Tree Port State >
Status Designated
NO LINK
NO LINK
NO LINK
NO LINK
NO LINK
NO LINK
NO LINK
NO LINK
Description
Shows port type as 1000SX (1000BASE-SX).
Displays the current state of this port within the spanning tree:
Disabled Port has been disabled by the user or has failed diagnostics.
No Link There is no valid link on the port.
Blocking 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.
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.
The priority and MAC address of the device through which this port must
communicate to reach the root of the spanning tree.
The priority and number of the port on the designated bridging device through which
this switch must communicate with the root of the spanning tree.
Designated
Cost Bridge
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
4 32768.0010B54C1EB6
<Ok>
Designated
Port
128.1
128.2
128.3
128.4
128.5
128.6
128.7
128.8