August 2005
Intermediate to advanced
798 pages
31h 12m
English
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Name
spanning-tree vlan — global
Synopsis
spanning-tree vlanvlan-id[forward-timeseconds| hello-timeseconds| max-ageseconds| prioritypriority| protocolprotocol| [root { primary | secondary} [ diameterdiameter[hello-timeseconds]]]] no spanning-tree vlanvlan-id
Configures
The port priority value for spanning-tree calculations
Default
Varies by option (details below)
Description
The command configures Spanning-Tree Protocol (STP) settings for each VLAN.
-
vlan-id The ID of the VLAN, from 1 to 1,005.
-
forward-time Optional. Sets the STP forward delay time, which can be from 4 to 30 seconds. Default is 15 seconds.
-
hello-time Optional. Sets the interval between configuration messages from the root bridge; can be from 1 to 10 seconds. Default is 2 seconds.
-
max-age Optional. Sets the maximum number of seconds that a BDPU packet is valid, which can be from 6 to 40 seconds. Default is 20 seconds.
-
priority Optional. Sets the STP bridge priority, which can be from 0 to 65,535. Default is 128 (with the
ieeeprotocol, default is 3,278).-
protocol Optional. Sets the STP protocol. Valid choices are
dec,ibm,ieee, andvlan-bridge.ieeeis the default.-
root primary Optional. Forces this device to be the root bridge.
-
root secondary Optional. Forces this device to act as a secondary switch, which means it becomes the root switch if the primary root fails.
-
diameter Optional. Set the maximum number of switches between any two end stations. Value can be from 2 to 7.
Example
! Enable spanning-tree on ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.