Cisco NM-8B-U - HW ROUTERS L-M User Manual page 127

16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series
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Each switch in a spanning tree adopts the interval between hello BPDUs, the forward delay interval,
Note
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:
Command
Step 1
configure terminal
Step 2
bridge bridge-group hello-time seconds
Step 3
end
Step 4 show running-config
Step 5 copy running-config startup-config
To return to the default setting, use the no bridge bridge-group hello-time global configuration
command.
Changing the Forward-Delay Interval
The forward-delay interval is the amount of time spent listening for topology change information after
an interface has been activated for switching and before forwarding actually begins.
Beginning in privileged EXEC mode, follow these steps to change the forward-delay interval:
Command
Step 1 configure terminal
Step 2 bridge bridge-group forward-time
seconds
Step 3
end
Step 4
show running-config
Step 5
copy running-config startup-config
To return to the default setting, use the no bridge bridge-group forward-time seconds global
configuration command.
Changing the Forward-Delay Interval, page 127
Changing the Maximum-Idle Interval, page 128
Purpose
Enters global configuration mode.
Specifies 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 seconds.
Returns to privileged EXEC mode.
Verifies your entry.
(Optional) Saves your entry in the configuration file.
Purpose
Enters global configuration mode.
Specifies the forward-delay interval.
• For bridge-group, specify the bridge group number. The range is 1
to 255.
For seconds, enter a number from 10 to 200. The default is 20
•
seconds.
Returns to privileged EXEC mode.
Verifies your entry.
(Optional) Saves your entry in the configuration file.
Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ
Configuration Tasks
127