Adjusting Bridge Protocol Data Unit (Bpdu) Intervals; Adjusting The Interval Between Hello Times; Defining The Forward Delay Interval; Defining The Maximum Age - Cabletron Systems SMARTSWITCH ROUTER 9032578-05 User's Reference Manual

Chapter 3: Bridging Configuration Guide

Adjusting Bridge Protocol Data Unit (BPDU) Intervals

You can adjust BPDU intervals as described in the following sections:
• Adjust the Interval between Hello BPDUs
• Define the Forward Delay Interval
• Define the Maximum Idle Interval

Adjusting the Interval between Hello Times

You can specify the interval between hello time.
To adjust this interval, enter the following command in Configure mode:
Specify the interval between hello
time for default spanning tree.
Specify the interval between hello
time for a particular instance of
spanning tree.

Defining 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 bridging and before forwarding
actually begins.
To change the default interval setting, enter the following command in Configure mode:
Set the default of the forward delay
interval for default spanning tree.
Set the default of the forward delay
interval for a particular instance of
spanning tree.

Defining the Maximum Age

If a bridge does not hear BPDUs from the root bridge within a specified interval, it
assumes that the network has changed and recomputes the spanning-tree topology.
30
stp set bridging hello-time
pvst set bridging spanning-tree
<num>
hello-time
stp set bridging forward-delay
pvst set bridging spanning-tree
<num>
forward-delay
SmartSwitch Router User Reference Manual
<num>
<string>
<num>
<string>