Common Internal Spanning Tree Configuration; Cist Bridge Configuration - NEC N8406-023 Command Reference Manual

Common Internal Spanning Tree configuration

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 CIST commands.
Table 106 CIST Configuration commands
Command
spanning-tree mstp
cist-add-vlan <1-4095>
default spanning-tree
mstp cist
show spanning-tree mstp
cist

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+.
The following table describes the commands used to configure CIST Bridge Configuration commands.
Table 107 CIST Bridge Configuration commands
Command
spanning-tree mstp cist-
bridge priority <0-65535>
spanning-tree mstp cist-
bridge maximum-age <6-40>
spanning-tree mstp cist-
bridge forward-delay <4-30>
show spanning-tree mstp cist
Description
Adds VLANs to the CIST. Enter one VLAN per line, and press Enter to add the
VLANs.
Command mode: Global configuration
Resets all CIST parameters to their default values.
Command mode: Global configuration
Displays the current CIST configuration.
Command mode: All
Description
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.
Command mode: Global configuration
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.
Command mode: Global configuration
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.
Command mode: Global configuration
Displays the current CIST bridge configuration.
Command mode: All
N8406-023 1Gb Intelligent L3 Switch Command Reference Guide (ISCLI) 105