Dell PowerConnect B-FCXs Configuration Manual page 255

Enabling STP protection
You can enable STP Protection on a per-port basis.
To prevent an end station from initiating or participating in STP topology changes, enter the
following command at the Interface level of the CLI.
PowerConnect#(config) interface e 2
PowerConnect#(config-if-e1000-2)#stp-protect
This command causes the port to drop STP BPDUs sent from the device on the other end of the
link.
Syntax: [no] stp-protect
Enter the no form of the command to disable STP protection on the port.
Clearing BPDU drop counters
For each port that has STP Protection enabled, the Dell PowerConnect device counts and records
the number of dropped BPDUs. You can use CLI commands to clear the BPDU drop counters for all
ports on the device, or for a specific port on the device.
To clear the BPDU drop counters for all ports on the device that have STP Protection enabled, enter
the following command at the Global CONFIG level of the CLI.
PowerConnect(config)#clear stp-protect-statistics
To clear the BPDU drop counter for a specific port that has STP Protection enabled, enter the
following command at the Global CONFIG level of the CLI.
PowerConnect#clear stp-protect-statistics e 2
Syntax: clear stp-protect-statistics [ethernet [<port>] | [ethernet [<port>]
Specify the <port> variable in the following formats:
•
Viewing the STP Protection Configuration
You can view the STP Protection configuration for all ports on a device, or for a specific port only.
The show stp-protect command output shows the port number on which STP Protection is enabled,
and the number of BPDUs dropped by each port.
To view the STP Protection configuration for all ports on the device, enter the following command at
any level of the CLI.
PowerConnect#show stp-protect
Port ID
3
5
6
12
To view STP Protection configuration for a specific port, enter the following command at any level of
the CLI.
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
BPDU Drop Count
478
213
0
31
Configuring standard STP parameters
8
213