Layer 2 Switching Commands 751
To reset the default forward time, use the no form of this command.
Syntax
spanning-tree forward-time seconds
no spanning-tree forward-time
• seconds — Time in seconds. (Range: 4–30)
Default Configuration
The default forwarding-time for IEEE Spanning-tree Protocol (STP) is 15
seconds.
Command Mode
Global Configuration mode.
User Guidelines
When configuring the Forward-Time the following relationship should be
satisfied:
2*(Forward-Time - 1) >= Max-Age.
Example
The following example configures spanning-tree bridge forward time to 25
seconds.
console(config)#spanning-tree forward-time 25
spanning-tree guard
The spanning-tree guard command selects whether loop guard or root guard
is enabled on an interface. If neither is enabled, the port operates in
accordance with the multiple spanning tree protocol. Use the “no” form of
this command to disable loop guard or root guard on the interface.
Syntax
spanning-tree guard {root | loop | none}
• root — Enables root guard.
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