Riverstone Networks WICT1-12 - Manual (Page 73)

Riverstone Networks RS Switch Router User Guide Release 8.0 5-9
Bridging Configuration Guide Configuring Spanning Tree
Setting 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:
Assigning 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:
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
Establish a priority for a specified
interface for default spanning tree.
stp set port priority
Establish a priority for a specified
interface for a particular instance of
spanning tree.
pvst set port spanning-tree
priority
Set a different port cost other than the
defaults for default spanning tree.
stp set port port-cost
Set a different port cost other than the
defaults for a particular instance of
spanning tree.
pvst set port spanning-tree
port-cost