Command Reference Guide

N8406-022A 1Gb Intelligent L2 Switch Command Reference Guide (AOS) 88
Common Internal Spanning Tree configuration
Command: /cfg/l2/mrst/cist
[Common Internal Spanning Tree Menu]
brg - CIST Bridge parameter menu
port - CIST Port parameter menu
add - Add VLAN(s) to CIST
default - Default Common Internal Spanning Tree and Member parameters
cur - Display current CIST parameters
The Common Internal Spanning Tree (CIST) provides compatibility with different MSTP regions and with devices
running different Spanning Tree instances. It is equivalent to Spanning Tree Group 0.
The following table describes the commands used to configure Common Internal Spanning Tree Configuration
Menu options.
Table 87 Common Internal Spanning Tree Configuration Menu options
Command
Description
Brg
Displays the CIST Bridge Menu.
port <port number>
Displays the CIST Port Menu.
Add <1-4095>
Adds VLANs to the CIST. Enter one VLAN per line, and press Enter to add the VLANs.
default
Resets all CIST parameters to their default values.
Cur
Displays the current CIST configuration.
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 88 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.