Cisco Catalyst 3550

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Catalyst 3550 Multilayer Switch Command Reference
OL-8566-01
Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
spanning-tree transmit hold-count
spanning-tree transmit hold-count
Use the spanning-tree transmit hold-count command to configure the number of bridge protocol data
units (BPDUs) sent every second. Use the no form of this command to return to the default setting.
spanning-tree transmit hold-count [value]
no spanning-tree transmit hold-count [value]
Syntax Description Number of BPDUs sent every second. The range is 1 to 20.
Defaults The default is 6.
Command Modes Global configuration
Command History
Usage Guidelines Increasing the transmit hold-count value can have a significant impact on CPU utilization when the
switch is in rapid-per-VLAN spanning-tree plus (rapid-PVST+) mode. Decreasing this value might slow
down convergence. We recommend using the default setting.
Examples This example shows how to set the transmit hold count to 8:
Switch(config)# spanning-tree transmit hold-count8
You can verify your setting by entering the show spanning-tree mst privileged EXEC command.
Related Commands
Release Modification
12.2(25)SEC This command was introduced
Command Description
show spanning-tree mst Displays the multiple spanning-tree (MST) region
configuration and status, including the transmit holdcount.