Configuring The Bridge To Support Stp - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide

3.2.4 Configuring the Bridge to Support STP

I. Disabling/enabling STP on ports
To have STP parameters take effect on a bridge port, you must enable STP on it.
Perform the following configuration in interface view.
Table 3-15 Disable/enable STP on the port
Disable STP on the port
Enable STP on the port
By default, STP is enabled on the port.
II. Specifying the STP version supported by a bridge-set
STP has multiple standards, which are not compatible. To prevent bridging loops, the
communicating parties must use the same STP standard.
Currently, 3Com Routers only support IEEE STP.
Perform the following configuration in system view.
Table 3-16 Specify the STP version supported by a bridge-set
Specify the STP version supported by a
bridge-set
Disable a bridge-set to support STP
By default, bridge-sets support IEEE STP.
III. Assigning a priority to the bridge (optional)
The ID of a bridge consists of two parts: bridge priority and bridge MAC address.
During a spanning tree calculation in a network, the bridge with the lowest ID is
elected as the root. The process is as follows:
Compare the priorities of the bridges in the network. The one with the lowest
bridge priority is elected as the root.
In case multiple bridges in the network have the same priority, compare their
MAC addresses and elect the bridge with the lowest MAC address as the root.
When STP is enabled, changing the priority of a bridge may cause spanning tree
recalculation.
Perform the following configuration in system view.
Operation
Operation
3Com Corporation
3-16
Chapter 3 Bridge Configuration
Command
bridge-set bridge-set stp disable
undo bridge-set bridge-set stp disable
Command
bridge bridge-set stp ieee
undo bridge bridge-set stp ieee