Chapter 18
| Spanning Tree Commands
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spanning-tree system-
bpdu-flooding
This command configures the system to flood BPDUs to all other ports on the
switch or just to all other ports in the same VLAN when spanning tree is disabled
globally on the switch or disabled on a specific port. Use the no form to restore the
default.
Syntax
spanning-tree system-bpdu-flooding {to-all | to-vlan}
no spanning-tree system-bpdu-flooding
to-all - Floods BPDUs to all other ports on the switch.
to-vlan - Floods BPDUs to all other ports within the receiving port’s native
VLAN (i.e., as determined by port’s PVID).
Default Setting
Floods to all other ports in the same VLAN.
Command Mode
Global Configuration
Command Usage
The spanning-tree system-bpdu-flooding command has no effect if BPDU
flooding is disabled on a port (see the spanning-tree port-bpdu-flooding
command).
Example
Console(config)#spanning-tree system-bpdu-flooding
Console(config)#
spanning-tree
transmission-limit
This command configures the minimum interval between the transmission of
consecutive RSTP/MSTP BPDUs. Use the no form to restore the default.
Syntax
spanning-tree transmission-limit count
no spanning-tree transmission-limit
count - The transmission limit in seconds. (Range: 1-10)
Default Setting
3
Command Mode
Global Configuration
Command Usage
This command limits the maximum transmission rate for BPDUs.
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