3Com Switch 4200G Configuration Guide

138 CHAPTER 20: MSTP CONFIGURATION
BPDU Protection
Configuration
Configuration procedure
Configuration example
Enable the BPDU protection function.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[4200G] stp bpdu-protection
Root Protection
Configuration
Enabling the root protection function in system view
Enabling the root protection function in Ethernet port view
Configuration example
Enable the root protection function on GigabitEthernet1/0/1 port.
■ Configure in system view.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[4200G] stp interface GigabitEthernet1/0/1 root-protection
■ Configure in Ethernet port view.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[4200G] interface GigabitEthernet1/0/1
[4200G-GigabitEthernet1/0/1] stp root-protection
Loop Prevention
Configuration
You can configure the loop prevention function in the following two ways.
Table 111 Enable the BPDU protection function
Operation Command Description
Enter system view system-view —
Enable the BPDU
protection function
stp bpdu-protection Required
The BPDU protection function is
disabled by default.
Table 112 Enable the root protection function in system view
Operation Command Description
Enter system view system-view —
Enable the root
protection function on
specified ports
stp interface interface-list
root-protection
Required
The root protection function is
disabled by default.
Table 113 Enable the root protection function in Ethernet port view
Operation Command Description
Enter system view system-view —
Enter Ethernet port
view
Interface interface-type
interface-number
—
Enable the root
protection function on
current port
stp root-protection Required
The root protection function is
disabled by default.