14 Summit24e3 Switch Quick Reference Guide
STP Commands
Command Description
config stpd <stpd_name> add vlan <name> Adds a VLAN to the STPD.
config stpd <stpd_name> forwarddelay
<value>
Specifies the time (in seconds) that the ports in this STPD spend
in the listening and learning states when the switch is the Root
Bridge.
The range is 4 through 30. The default setting is 15 seconds.
config stpd <stpd_name> hellotime <value> Specifies the time delay (in seconds) between the transmission
of BPDUs from this STPD when it is the Root Bridge.
The range is 1 through 10. The default setting is 2 seconds.
config stpd <stpd_name> maxage <value> Specifies the maximum age of a BPDU in this STPD.
The range is 6 through 40. The default setting is 20 seconds.
Note that the time must be greater than, or equal to 2 * (Hello
Time + 1) and less than, or equal to 2 * (Forward Delay –1).
config stpd <stpd_name> ports cost <value>
<portlist>
Specifies the path cost of the port in this STPD.
The range is 1 through 65,535. The switch automatically assigns
a default path cost based on the speed of the port, as follows:
■ For a 10 Mbps port, the default cost is 100.
■ For a 100 Mbps port, the default cost is 19.
config stpd <stpd_name> ports priority
Specifies the priority of the port in this STPD. By changing the
priority of the port, you can make it more or less likely to become
the root port.
The range is 0 through 31. The default setting is 16. A setting of
0 indicates the lowest priority.
config stpd <stpd_name> priority <value> Specifies the priority of the STPD. By changing the priority of the
STPD, you can make it more or less likely to become the root
bridge.
The range is 0 through 65,535. The default setting is 32,768. A
setting of 0 indicates the highest priority.
create stpd <stpd_name> Creates an STPD. When created, an STPD has the following
default parameters:
■ Bridge priority — 32,768
■ Hello time — 2 seconds
■ Forward delay — 15 seconds
delete stpd <stpd_name> Removes an STPD. An STPD can only be removed if all VLANs
have been deleted from it. The default STPD, s0, cannot be
deleted.
disable ignore-bpdu vlan <name> Allows the switch to recognize STP BPDUs.
disable ignore-stp vlan <name> Allows a VLAN to use STP port information.
disable stpd [<stpd_name> | all] Disables the STP mechanism on a particular STPD, or for all
STPDs.
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