3Com Switch 4200G Configuration Guide

BPDU Tunnel Configuration 139
Enabling the loop prevention function on specified ports in system view
Enabling the loop prevention function on a port in Ethernet port view
Configuration example
Enable loop prevention function on GigabitEthernet1/0/1 port.
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[4200G] interface GigabitEthernet1/0/1
[4200G-GigabitEthernet1/0/1] stp loop-protection
TC-BPDU Attack
Prevention
Configuration
Configuration procedure
Configuration example
Enable the TC-BPDU attack prevention function
<S4200G> system-view
System View: return to User View with Ctrl+Z.
[4200G] stp tc-protection enable
BPDU Tunnel
Configuration
Introduction The BPDU Tunnel function enables BPDUs to be transparently transmitted between
geographically dispersed user networks through specified VLAN VPNs in operator’s
networks, through which spanning trees can be generated across these user
networks and are independent of those of the operator’s network.
Table 114 Enable the loop prevention function on specified ports in system view
Operation Command Description
Enter system view system-view —
Enable the loop
prevention function on
specified ports
stp interface interface-list
loop-protection
Required
By default, the loop prevention
function is disabled.
Table 115 Enable the loop prevention function on a port in Ethernet port view
Operation Command Description
Enter system view system-view —
Enter Ethernet port
view
interface interface-type
interface-number
—
Enable the loop
prevention function on
the current port
stp loop-protection Required
The loop prevention function is
disabled by default.
Table 116 Enable the TC-BPDU attack prevention function
Operation Command Description
Enter system view system-view —
Enable the TC-BPDU
attack prevention
function
stp tc-protection enable Required
The TC-BPDU attack prevention
function is enabled by default.