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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
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Chapter44 Configuring Fallback Bridging
Configuring Fallback Bridging
This example shows how to create bridge group 10 and to specify that the VLAN-bridge STP runs in the
bridge group. It defines an SVI for VLAN 2 and assigns it to the br idge group:
Switch(config)# bridge 10 protocol vlan-bridge
Switch(config)# vlan 2
Switch(config-vlan)# exit
Switch(config)# interface vlan2
Switch(config-if)# bridge-group 10
Switch(config-if)# exit
Adjusting Spanning-Tree Parameters
You might need to adjust certain spanning-tree parameters if the default values are not suitable. You
configure parameters affecting the entire spanning tree by using variations of the bridge global
configuration command. You configure interface-specific parameters by using variations of the
bridge-group interface configuration command.
You can adjust spanning-tree parameters by performing any of the tasks in these sections:
•Changing the VLAN-Bridge Spanning-Tree Priority, page 44-7 (optional)
•Changing the Interface Priority, page 44-7 (optional)
•Assigning a Path Cost, page 44-8 (optional)
•Adjusting BPDU Intervals, page 44-9 (optional)
•Disabling the Spanning Tree on an Interface, page 44-11 (optional)
Note Only network administrators with a good understanding of how switche s and STP function should make
adjustments to spanning-tree parameters. Poorly planned adjustments can have a negative impact on
performance. A good source on switching is the IEEE 802.1D specification. For mo re information, see
the “References and Recommended Reading” appendix in the Cisco IOS Configuration Fundamentals
Command Reference.