Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 397)

Brocade 6910 Ethernet Access Switch Configuration Guide 347
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Spanning Tree Commands
18
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• This command is used by the Spanning Tree Algorithm to determine the best path between
devices. Therefore, lower values should be assigned to ports attached to faster media, and
higher values assigned to ports with slower media.
• Path cost takes precedence over port priority.
• When the path cost method ( page 339 ) is set to short, the maximum value for path cost is
65,535.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree cost 50
Console(config-if)#
spanning-tree edge-port
This command specifies an interface as an edge port. Use the no form to restore the default.
Syntax
spanning-tree edge-port [auto]
no spanning-tree edge-port
auto - Automatically determines if an interface is an edge port.
Default Setting
Auto
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
You can enable this option if an interface is attached to a LAN segment that is at the end of a
bridged LAN or to an end node. Since end nodes cannot cause forwarding loops, they can pass
directly through to the spanning tree forwarding state. Specifying Edge Ports provides quicker
convergence for devices such as workstations or servers, retains the current forwarding database
to reduce the amount of frame flooding required to rebuild address tables during reconfiguration
events, does not cause the spanning tree to initiate reconfiguration when the interface changes
state, and also overcomes other STA-related time out problems. However, remember that Edge Port
should only be enabled for ports connected to an end-node device.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree edge-port
Console(config-if)#