Technical data

BLADE OS 5.0 Command Reference
BMD00142, November 2009 Chapter 6: The Configuration Menu
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/cfg/l2/mrst/cist/brg
CIST Bridge Configuration
CIST bridge parameters are used only when the switch is in MSTP mode. CIST parameters do not
affect operation of STP/PVST+.
[CIST Bridge Menu]
prior - Set CIST bridge Priority (0-65535)
mxage - Set CIST bridge Max Age (6-40 secs)
fwd - Set CIST bridge Forward Delay (4-30 secs)
cur - Display current CIST bridge parameters
Table 123 CIST Bridge Configuration Options
Command Syntax and Usage
prior <0-65535>
Configures the CIST bridge priority. The bridge priority parameter controls which bridge on
the network is the MSTP root bridge. To make this switch the root bridge, configure the
bridge priority lower than all other switches and bridges on your network. The lower the
value, the higher the bridge priority.
The range is 0 to 65535, in steps of 4096 (0, 4096, 8192...). The default value is 61440.
mxage <6-40 seconds>
Configures the CIST bridge maximum age. The maximum age parameter specifies the
maximum time the bridge waits without receiving a configuration bridge protocol data unit
before it reconfigures the MSTP network. The range is 6 to 40 seconds, and the default is 20
seconds.
fwd <4-30 seconds>
Configures the CIST bridge forward delay parameter. The forward delay parameter specifies
the amount of time that a bridge port has to wait before it changes from the listening state to
the learning state and from the learning state to the forwarding state. The range is 4 to 30
seconds, and the default is 15 seconds.
cur
Displays the current CIST bridge configuration.