Displaying Stp Information - Dell PowerConnect B-RX Configuration Manual

12
IEEE 802.1D Spanning Tree Protocol (STP)
To prevent an end station from initiating or participating in STP topology changes, enter the
following command at the interface level of the CLI.
BigIron RX(config) interface ethe 2/1
BigIron RX(config-if-e1000-2/1)# spanning-tree protect
This command causes the port to drop STP BPDUs sent from the device on the other end of the
link.
Syntax: [no] spanning-tree protect
Enter the no form of the command to disable BPDU Guard on the port and remove the
spanning-tree protect do-disable feature if they are configured.
Enabling BPDU Guard and disabling a port that receives BPDUs
You can enable BPDU Guard on a port and at the same time configure a port to be disabled when it
receives a BPDU. Enter the following commands.
BigIron RX(config) interface ethe 2/1
BigIron RX(config-if-e1000-2/1)#spanning-tree protect do-disable
Syntax: [no] spanning-tree protect do-disable
If both spanning-tree protect and spanning-tree protect do-disable are configured on an interface,
spanning-tree protect do-disable takes precedence. This means that when the port receives a
BPDU, the port will drop the BPDU and disable the port.
If you issue a no spanning-tree protect do-disable command, the port will be re-enabled and will no
longer be disabled when it receives a BPDU. The following message is displayed when you enter the
no spanning-tree protect do-disable command.
This command removes only "spanning-tree protect do-disable". To remove
"spanning-tree protect", please issue a separate command "no spanning-tree
protect".

Displaying STP information

You can display the following STP information:
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Displaying STP information for an entire device
To display STP information, enter the following command at any level of the CLI.
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All the global and interface STP settings
Detailed STP information for each interface
STP state information for a VLAN
STP state information for an individual interface
BigIron RX Series Configuration Guide
53-1002253-01