3Com 5102B-EE installation and operation guide SET Spantree Hellotime

SET SPANTREE HELLO_TIME

Use the SET SPANTREE HELLO_TIME command to change how often the local bridge sends out a hello packet when it becomes the Root Bridge.

This value will take effect for the overall network when this bridge becomes the Root Bridge.

Format

SET SPANTREE HELLO_TIME {variable}

Parameters

{variable} = 1 - 10 (default is 2 seconds)

See Note for range restrictions.

Example

OEBM> set spantree hello_time 7 [ENTER]

Spanning tree parameters changed

Description

The SET SPANTREE HELLO_TIME command enables you to change how often the local bridge sends out a hello packet when it becomes the Root Bridge. This packet is sent to all other Ethernet Bridges to let them know the root is still active.

As a reminder, this parameter at the local Bridge Module has no effect on the operation of the network until the local bridge becomes the Root Bridge. While the local bridge is a non-root bridge, it will function using the Root Bridge's value for this parameter.

If you choose to modify the spantree parameter default values for forward_delay_time, hello_time, or listen_time, you must use the following two formulas to calculate new values:

1.2 * (forward_delay_time - 1.0 seconds) > listen_time

4 - 68 ONline Ethernet Bridge Module Installation and Operation Guide