3Com 4210 PWR Configuration Manual page 177

Configuration
Prerequisites
Configuring BPDU Guard
Configuring Root Guard
the maximum times for a switch to remove the MAC address table and ARP
entries to 100 and the switch receives 200 TC-BPDUs in the period, the switch
removes the MAC address table and ARP entries for only 100 times within the
period.
MSTP runs normally on the switch.
Configuration procedure
Table 130 Configure BPDU guard
Operation
Enter system view
Enable the BPDU guard
function
Configuration example
# Enable the BPDU guard function.
<4210> system-view
[4210] stp bpdu-protection
Configuration procedure
Table 131 Configure the root guard function in system view
Operation
Enter system view
Enable the root guard
function on specified ports
Table 132 Enable the root guard function in Ethernet port view
Operation
Enter system view
Enter Ethernet port view
Enable the root guard
function on the current port
Configuration example
# Enable the root guard function on Ethernet 1/0/1.
1 Perform this configuration in system view
<4210> system-view
[4210] stp interface Ethernet1/0/1 root-protection
2 Perform this configuration in Ethernet port view
Configuring Guard Functions
Command
system-view
stp bpdu-protection
Command
system-view
stp interface interface-list
root-protection
Command
system-view
interface interface-type
interface-number
stp root-protection
175
Description
-
Required
The BPDU guard function is
disabled by default.
Description
-
Required
The root guard function is
disabled by default.
Description
-
-
Required
The root guard function is
disabled by default.