Configuration Menu 114
CIST bridge configuration
Command: /cfg/l2/mrst/cist/brg
[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
CIST bridge parameters are used only when the switch is in MSTP mode. CIST parameters do not affect operation of
STP/PVST.
The following table describes the commands used to configure CIST Bridge Configuration Menu options parameters.
Table 108 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
