Cisco Systems N3KC3064TFAL3 Configuring the Hello Time, hello-time seconds, Procedure, Purpose

Configuring Multiple Spanning Tree

Configuring the Hello Time

Note Exercise care when using this command. For most situations, we recommend that you enter the spanning-tree mst root primary and the spanning-tree mst root secondary global configuration commands to modify the switch priority.

Procedure

Command or Action

Step 1 switch# configure terminal

Step 2 switch(config)# spanning-tree mst instance-idpriority priority-value

Purpose

Enters configuration mode.

Configures a switch priority as follows:

•For instance-id, you can specify a single instance, a range of instances separated by a hyphen, or a series of instances separated by a comma. The range is from 1 to 4094.

•For priority, the range is from 0 to 61440 in increments of 4096; the default is 32768. A lower number indicates that the switch will most likely be chosen as the root bridge.

Priority values are 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, and 61440. The system rejects all other values.

This example shows how to configure the priority of the bridge to 4096 for MSTI 5:

switch# configure terminal

switch(config)# spanning-tree mst 5 priority 4096

Configuring the Hello Time

You can configure the interval between the generation of configuration messages by the root bridge for all instances on the switch by changing the hello time.

Note Exercise care when using this command. For most situations, we recommend that you enter the spanning-tree mst instance-idroot primary and the spanning-tree mst instance-idroot secondary configuration commands to modify the hello time.

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# spanning-tree mst	Configures the hello time for all MST instances. The hello
	hello-time seconds	time is the interval between the generation of configuration

Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)

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