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C
ONFIGURING
THE
S
WITCH
3-136
CLI – This example enables Spanning Tree Protocol, sets the mode to
MST, and then configures the STA and MSTP parameters.
Displaying Interface Settings
The STA Port Information and STA Trunk Information pages display the
current status of ports and trunks in the Spanning Tree.
Field Attributes
• Spanning Tree – Shows if STA has been enabled on this interface.
• STA Status – Displays current state of this port within the Spanning
Tree:
• Discarding - Port receives STA configuration messages, but does
not forward packets.
• Learning - Port 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 - 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 discarding.
Console(config)#spanning-tree3-39
Console(config)#spanning-tree mode mst3-39
Console(config)#spanning-tree priority 400003-43
Console(config)#spanning-tree hello-time 53-42
Console(config)#spanning-tree max-age 383-42
Console(config)#spanning-tree forward-time 203-41
Console(config)#spanning-tree pathcost method long3-44
Console(config)#spanning-tree transmission-limit 43-45
Console(config)#4-168
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