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Configuration Menu 116
The following table describes the commands used to configure CIST Bridge Configuration Menu options parameters.
Table 116 CIST Bridge Configuration Menu options
Command Description
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, and the default is 32768.
This command does not apply to RSTP. See the "Bridge Spanning Tree configuration" section for
more information.
mxage <6-40> 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.
This command does not apply to RSTP. See the "Bridge Spanning Tree configuration" section for
more information.
fwd <4-30> 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.
This command does not apply to RSTP. See the "Bridge Spanning Tree configuration" section for
more information.
cur Displays the current CIST bridge configuration.
CIST port configuration
Command: /cfg/l2/mrst/cist/port <port number>
[CIST Port 1 Menu]
prior - Set port Priority (0-240)
cost - Set port Path Cost (1-200000000)
hello - Set CIST port Hello Time (1-10 secs)
link - Set MSTP link type (auto, p2p, or shared; default: auto)
edge - Enables or disables this port as an edge port
on - Turn port's Spanning Tree ON
off - Turn port's Spanning Tree OFF
cur - Display current port Spanning Tree parameters
CIST port parameters are used to modify MRST operation on an individual port basis. CIST parameters do not affect
operation of STP/PVST.
For each port, CIST is turned on by default. Port parameters include:
• Port priority
• Port path cost
• Port Hello time
• Link type
• Edge
• On and off
• Current port configuration
The port option of MRST is turned on by default.