BelAir20E User Guide
Layer 2 Network Configuration
April 2, 2012
Confidential
Document Number BDTM02201-A01 Standard
topology. BelAir recommends that the root node is the Ethernet switch that is
used to connect to the LIM(s).
Refer to your network plan for details.
to specify the STP priority and the version of STP used by
the BelAir20E unit.
Configuring Other
Spanning Tree
Parameters
describes spanning tree parameters that you can configure in addition
to the STP node priority and path cost.
Table 16: Configurable Spanning Tree Timers and Associated Parameters
Parameter
Default
Value
Description
Possible Range
Hello Timer
2 s
Determines how often
the bridge broadcasts
hello messages to other
bridges
1 s to 10 s
Must be less than
or equal to:
(1/2Max_Age - 1)
Forward
Delay Timer
15 s
Determines how long
each of the listening and
learning states last before
the interface begins
forwarding
4 s to 30 s
Must not be less
than:
(1/2M 1)
Maximum
Age Timer
20 s
Determines the amount
of time the bridge stores
protocol information
received on an interface
6 s to 40 s
Must not be less
than:
2(Hello 1)
Must not exceed:
2(Forward_Delay - 1)
Transmit
Hold Count
6
Transmit hold count
(packet queue length)
1 to 10
Path Cost
Type
32 bit
Represents the media
speed (or bit rate)
16 bit or 32 bit
