BelAir Networks BelAir 100SN, Руководство пользователя

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BelAir100SN User Guide Layer 2 Network Configuration
May 31, 2010 Confidential Page 169 of 212
Document Number BDTM11001-A01 Released
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.
Use the command described in “RSTP Priority” on page 176 and “RSTP
Version” on page 176 to specify the STP priority and the version of STP used by
the BelAir100SN unit.
Configuring Other
Spanning Tree
Parameters
Table 15 describes spanning tree parameters that you can configure in addition
to the STP node priority and path cost.
Table 15: 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