3.14.4 CIST/MSTI Port Configuration

Use this command to configure the STP CIST/MSTI aggregated and normal ports parameters.

Command Syntax:

spanning-tree aggregation spanning-tree mst <instance> cost { <cost> | auto }
spanning-tree mst <instance> priority <prio>
spanning-tree edge spanning-tree auto-edge spanning-tree restricted-role 
spanning-tree restricted-tcn 
spanning-tree bpdu-guard 
spanning-tree link-type { point-to-point | shared | auto }

Table 3-73. Command Description
	Argument	Description
Parameter	`<instance>`	STP bridge instance. Must be set to 0 (zero) for the CIST and to a value between 1 and 7 for MSTI.
	`priority <prio>`	Port priority must be divisible by 16. Supported values are 0/16/32/48/64/80/96/112/128/144/160/176/192/208/224/240. The default value is 128.
	`<cost>`	The Auto setting sets the path cost as appropriate by the physical link speed, using the 802.1D recommended values. A user-defined value can be entered. Valid values are in the range of 1–200000000.
Default	N.A
Mode	STP Aggregation mode and Port List Interface mode
Usage	Configure STP CIST/MSTI aggregated and normal ports parameters. To revert to default, use the ‘no’ version of the command.
Example	Example 1: Configure the CIST aggregated port priority 32. `# configure terminal (config)# spanning-tree aggregation (config-stp-aggr)# spanning-tree mst 0 port-priority 32` Example 2: Configure the CIST port 2 priority 64 with auto edge disabled. `(config)# interface GigabitEthernet 1/2 (config-if)# spanning-tree mst 0 port-priority 64 (config-if)# spanning-tree no auto-edge`