SPANNING TREE PROTOCOL (STP)

Table 7-1shows the commands used to configure STP.

Table 7-1:STP Configuration Commands

Command

Description

 

 

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

enable stpd [<stpd_name> all]

Enables the STP protocol for one or all STPDs.

 

The default setting is disabled.

enable stpd port <portlist>

Enables the STP protocol on one or more ports.

 

If STPD is enabled for a port, BPDUs will be

 

generated on that port if STP is enabled for the

 

associated STPD. The default setting is enabled.

config stpd <stpd_name> add vlan <name>

Adds a VLAN to the STPD.

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> forwarddelay

Specifies the time (in seconds) that the ports in

<value>

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> 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 X (Hello Time + 1) and less than, or equal to

 

2 X (Forward Delay –1).

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.

 

 

7-6

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Extreme Networks Summit1 manual 1STP Configuration Commands, Stpd