3com 8807 Reference Guide

C

HAPTER

 13: MSTP C

ONFIGURATION

 C

OMMANDS

System view

interface-list: Ethernet port list, containing multiple Ethernet ports and expressed 
as interface-list = { interface-type interface-number [ to interface-type 
interface-number ] }&<1-10>. For detail descriptions of interface-type and 
interface-number parameters, refer to the corresponding descriptions in Port 
Command Manual. &<1-10> means that the preceding parameters can be 
entered up to 10 times

instance-id: Specifies the spanning tree instance ID, ranging from 0 to 48. The 
Instance 0 represents CIST.

port priority priority: Specifies the port priority, ranging from 0 to 240 with a step 
length of 16, e.g., 0, 16 and 32. By default, the port has a priority of 128 on every 
MSTI.

Use the stp interface instance port priority command to configure the priority 
of the specified port on the specified MSTI in system view.

Use the undo stp interface instance port priority command to restore the 
default priority.

You may specify the instance-id parameter as 0 to configure CIST priority of the 
port. The port priority has effect on the port role selection for the specified MSTI. 
A port can be configured with different priorities on different MSTIs. Thus the 
traffic from different VLANs can run over different physical links, thereby 
implementing the VLAN-based load-balancing. MSTP will recalculate the port role 
and transit its state, upon the port priority changes.

Related command: stp instance port priority.

# Set the priority of Ethernet 2/1/3 on MSTI 2 to 16 in system view.

<SW8800>system-view

 

System View: return to User View with Ctrl+Z.

 

[SW8800] stp interface Ethernet 2/1/3 instance 2 port priority 16 

stp interface interface-list loop-protection

undo stp interface interface-list loop-protection

System view

interface-list: Ethernet port list, containing multiple Ethernet ports and expressed 
as interface-list = { interface-type interface-number [ to interface-type