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4 - 68 ONline Ethernet Bridge Module Installation and Operation Guide
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