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Chapter 2: Bridging Configuration Guide
Configuring Spanning Tree
The IA supports per VLAN spanning tree. By default, all the VLANs defined belong to the
default spanning tree. You can create a separate instance of spanning tree using the
following command:
Create spanning tree for a VLAN.
By default, spanning tree is disabled on the IA. To enable spanning tree on the IA, you
perform the following tasks on the ports where you want spanning tree enabled.
Enable spanning tree on one or
more ports for default spanning
tree.
Enable spanning tree on one or
more ports for a particular VLAN.
Adjusting Spanning-Tree Parameters
You may need to adjust certain spanning-tree parameters if the default values are not
suitable for your bridge configuration. Parameters affecting the entire spanning tree are
configured with variations of the bridge global configuration command. Interface-specific
parameters are configured with variations of the bridge-group interface configuration
command.
You can adjust spanning-tree parameters by performing any of the tasks in the next two
sections:
•
"Setting the Bridge Priority"
•
"Setting a Port Priority"
Note:
Only network administrators with a good understanding of how bridges and the
Spanning-Tree Protocol work should make adjustments to spanning-tree
parameters. Poorly chosen adjustments to these parameters can have a negative
impact on performance. A good source on bridging is the IEEE 802.1d
specification.
42
pvst create spanningtree vlan-name
<string>
<port-list>
stp enable port
<port-list>
pvst enable port
<string>
Internet Appliance User Reference Manual
spanning-tree
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