Adjusting Bpdu Intervals - Cisco Catalyst 3120 Software Manual

Configuring Fallback Bridging
Command
Step 3 bridge-group bridge-group path-cost
cost
Step 4 end
Step 5
show running-config
Step 6
copy running-config startup-config
To return to the default path cost, use the no bridge-group bridge-group path-cost interface
configuration command.
This example shows how to change the path cost to 20 on a port in bridge group 10:
Switch(config)# interface gigabitethernet2/0/1
Switch(config-if)# bridge-group 10 path-cost 20

Adjusting BPDU Intervals

You can adjust BPDU intervals as described in these sections:
•
•
•
Each switch in a spanning tree adopts the interval between hello BPDUs, the forward delay interval, and
Note
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.
Command
Step 1
configure terminal
Step 2
bridge bridge-group hello-time seconds
Step 3 end
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
46-8
Adjusting the Interval between Hello BPDUs, page 46-8
Changing the Forward-Delay Interval, page 46-9
Changing the Maximum-Idle Interval, page 46-9
Purpose
Assign the path cost of a port.
• For bridge-group, specify the bridge group number. The range is 1
to 255.
• For cost, enter a number from 0 to 65535. The higher the value, the
higher the cost.
– For 10 Mb/s, the default path cost is 100.
– For 100 Mb/s, the default path cost is 19.
– For 1000 Mb/s, the default path cost is 4.
Return to privileged EXEC mode.
Verify your entry.
(Optional) Save your entry in the configuration file.
(optional)
(optional)
Purpose
Enter global configuration mode.
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.
Return to privileged EXEC mode.
Chapter 46 Configuring Fallback Bridging
(optional)
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