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44-9
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 44 Configuring Fallback Bridging
Configuring Fallback Bridging
Adjusting BPDU Intervals
You can adjust BPDU intervals as described in these sections:
• Adjusting the Interval between Hello BPDUs, page 44-9 (optional)
• Changing the Forward-Delay Interval, page 44-10 (optional)
• Changing the Maximum-Idle Interval, page 44-10 (optional)
Note Each switch in a spanning tree adopts the interval between hello BPDUs, the forward delay interval, and
the maximum idle interval parameters of the root switch, regardless of what its individual configuration
might be.
Adjusting the Interval between Hello BPDUs
Beginning in privileged EXEC mode, follow these step to adjust the interval between hello BPDUs. This
procedure is optional.
To return to the default setting, use the no bridge bridge-group hello-time global configuration
command.
This example shows how to change the hello interval to 5 seconds in bridge group 10:
Switch(config)# bridge 10 hello-time 5
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
bridge bridge-group hello-time seconds Specify the interval between hello BPDUs.
• For bridge-group, specify the bridge group number. The range is 1
to 255.
• For seconds, enter a number from 1 to 10. The default is 2.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entry.
Step 5
copy running-config startup-config (Optional) Save your entry in the configuration file.