Set The Bridge Priority; Set A Port Priority; Assign Port Costs; Adjust Bridge Protocol Data Unit (Bpdu) Intervals - Cabletron Systems SmartSwitch 8-slot User's Reference Manual

Chapter 2: Bridging Configuration Guide

Set the Bridge Priority

You can globally configure the priority of an individual bridge when two bridges tie
for position as the root bridge, or you can configure the likelihood that a bridge will be
selected as the root bridge. The lower the bridge's priority, the more likely the bridge
will be selected as the root bridge. This priority is determined by default; however, you
can change it.
To set the bridge priority, enter the following command in Configure mode:
Set the bridge priority.

Set a Port Priority

You can set a priority for an interface. When two bridges tie for position as the root
bridge, you configure an interface priority to break the tie. The bridge with the lowest
interface value is elected.
To set an interface priority, enter the following command in Configure mode:
Establish a priority for a specified inter-
face.

Assign Port Costs

Each interface has a port cost associated with it. By convention, the port cost is 1000/
data rate of the attached LAN, in Mbps. You can set different port costs.
To assign port costs, enter the following command in Configure mode:
Set a different port cost other than the
defaults.

Adjust 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
Adjust 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
2 - 8
stp set bridging priority
<port-list>
stp set port
<port-list>
stp set port
stp set bridging hello-time
<num>
<num>
priority
<num>
port-cost
<num>
SSR User Reference Manual