3Com 7750 Series 1.1.10 stp bpdu-protection

3Com Switch 7750 Series
Command Reference Guide – MSTP Chapter 1 MSTP Configuration Commands
1-10
Related command: stp mode, and stp interface.
Example
# Enable MSTP globally.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] stp enable
# Disable MSTP on Ethernet1/0/1 port.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] interface ethernet 1/0/1
[3Com-Ethernet1/0/1] stp disable
1.1.10 stp bpdu-protection
Syntax
stp bpdu-protection
undo stp bpdu-protection
View
System view
Parameter
None
Description
Use the stp bpdu-protection command to enable the BPDU protection function.
Use the undo stp bpdu-protection command to revert to the default state of the
BPDU protection function.
By default, the BPDU protection function is disabled.
Normally, the access ports of the devices operating on the access layer directly connect
to terminals (such as PCs) or file servers. These ports are usually configured as edge
ports to achieve rapid transition. But they resume non-edge ports automatically upon
receiving configuration BPDUs, which causes spanning trees regeneration and
network topology jitter.
Normally, no configuration BPDU will reach edge ports. But malicious users can attack
a network by sending configuration BPDUs deliberately to edge ports to cause network
jitter. You can prevent this type of attacks by utilizing the BPDU protection function.
With this function enabled on a switch, the switch shuts down the edge ports that