ProCurve 2610-PWR Technical Information download pdf (Page 136)

Spanning-Tree Operation

802.1D Spanning-Tree Protocol (STP)

Enabling STP implements the spanning tree protocol for all physical ports on

the switch, regardless of whether multiple VLANs are configured. Disabling

STP removes protection against redundant loops that can significantly slow

or halt a network.

This command enables STP with the current parameter settings or disables

STP without losing the most-recently configured parameter settings. (To learn

how the switch handles parameter changes, how to test changes without

losing the previous settings, and how to replace previous settings with new

settings, refer to the chapter titled “Switch Memory and Configuration” in the

Management and Configuration Guide for your switch.) When enabling STP,

you can also include the STP general and per-port parameters described in

the next two sections. When you use the “no” form of the command, you can

do so only to disable STP. (STP parameter settings are not changed when you

disable STP.)

Caution Because incorrect STP settings can adversely affect network performance,

ProCurve recommends that you use the default STP parameter settings. You

should not change these settings unless you have a strong understanding of

how STP operates. For more on STP, see the IEEE 802.1D standard.

Reconfiguring General STP Operation on the Switch. You can config-

ure one or more of the following parameters:

Table 5-3. General STP Operating Parameters

Name Default Range Function

priority 32768 0 - 65535 Specifies the priority value used along with the

switch MAC address to determine which device is

root. The lower a priority value, the higher the

priority.

*maximum-age 20 seconds 6 - 40 Maximum received message age the switch

seconds allows for STP information before discarding the

message.

*hello-time 2 seconds 1 - 10 Time between messages transmitted when the

switch is the root.

*forward-delay 15 seconds 4 - 30 Time the switch waits before transitioning from the

seconds listening to the learning state, and between the

learning state to the forwarding state.

*The switch uses its own maximum-age, hello-time, and forward-delay settings only if it is

operating as the root device. If another device is operating as the root device, then the switch

uses the other device’s settings for these parameters.

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ProCurve 2610-PWR Technical Information Page 136