Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 324)

Enabling BPDU protection by port
You enable STP BPDU guard on individual interfaces. The feature is disabled by default.
To enable STP BPDU guard on a specific port, enter a command such as the following.
device(config) interface ethe 2/1
device(config-if-e1000-2/1)#stp-bpdu-guard
Syntax: [no] stp-bpd-guard
The no parameter disables the BPDU guard on this interface.
You can also use the multiple interface command to enable this feature on multiple ports at once.
device(config)#interface ethernet 1/1 to 1/9
device(config-mif-1/1-1/9)#stp-bpdu-guard
device(config-mif-1/1-1/9)#
This will enable stp-bpdu-guard on ports 0/1/1 to 0/1/9
Re-enabling ports disabled by BPDU guard
When a BPDU Guard-enabled port is disabled by BPDU Guard, the Brocade device will place the port
in errdisable state and display a message on the console indicating that the port is errdisabled (refer
to
BPDU guard status example console messages on page 325). In addition, the show interface
command output will indicate that the port is errdisabled.
device#show int e 2
Gigabit Ethernet2 is ERR-DISABLED (bpduguard), line protocol is down
To re-enable a port that is in errdisable state, you must first disable the port then re-enable it. Enter
commands such as the following.
device(config)#int e 2
device(config-if-e1000-2)#disable
device(config-if-e1000-2)#enable
If you attempt to enable an errdisabled port without first disabling it, the following error message will
appear on the console.
device(config-if-e1000-2)#enable
Port 2 is errdisabled, do disable first and then enable to enable it
Displaying the BPDU guard status
To display the BPDU guard state, enter the show running configuration or the show stp-bpdu-
guard command.
For FastIron X Series devices, enter the stp-bpdu-guard command.
device#show stp-bpdu-guard
BPDU Guard Enabled on:
Interface Violation
Port 1 No
Port 2 No
Port 3 No
Port 4 No
Port 5 No
Port 6 No
Port 7 No
Enabling BPDU protection by port
324 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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