Cisco Systems 3750E Displaying the Spanning-Tree Status, Configuring the Transmit Hold-Count

Chapter 18 Configuring STP

Displaying the Spanning-Tree Status

Configuring the Transmit Hold-Count

You can configure the BPDU burst size by changing the transmit hold count value.

Note Changing this parameter to a higher value can have a significant impact on CPU utilization, especially in Rapid-PVST mode. Lowering this value can slow down convergence in certain scenarios. We recommend that you maintain the default setting.

Beginning in privileged EXEC mode, follow these steps to configure the transmit hold-count. This procedure is optional.

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	spanning-tree transmit hold-count value	Configure the number of BPDUs that can be sent before pausing
		for 1 second.
		For value, the range is 1 to 20; the default is 6.
Step 3
	end	Return to privileged EXEC mode.
Step 4
	show spanning-tree detail	Verify your entries.
Step 5
	copy running-config startup-config	(Optional) Save your entries in the configuration file.

To return to the default setting, use the no spanning-tree transmit hold-countvalue global configuration command.

Displaying the Spanning-Tree Status

To display the spanning-tree status, use one or more of the privileged EXEC commands in Table 18-5:

Table 18-5	Commands for Displaying Spanning-Tree Status
Command		Purpose
show spanning-tree active		Displays spanning-tree information on active interfaces only.
show spanning-tree detail		Displays a detailed summary of interface information.
show spanning-tree interface interface-id		Displays spanning-tree information for the specified interface.
show spanning-tree summary [totals]		Displays a summary of interface states or displays the total lines of the STP
		state section.

You can clear spanning-tree counters by using the clear spanning-tree[interface interface-id] privileged EXEC command.

For information about other keywords for the show spanning-treeprivileged EXEC command, see the command reference for this release.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
18-24	OL-9775-02