Configuring The Switch Priority; Configuring The Hello Time - Cisco 2950G 24 - Catalyst Switch Software Configuration Manual

Chapter 12 Configuring RSTP and MSTP

Configuring the Switch Priority

You can configure the switch priority and make it more likely that the switch will be chosen as the root
switch.
Note Exercise care when using this command. For most situations, we recommend that you use the
spanning-tree mst instance-id root primary and the spanning-tree mst instance-id root secondary
global configuration commands to modify the switch priority.
Beginning in privileged EXEC mode, follow these steps to configure the switch priority:
Command
Step 1 configure terminal
Step 2
spanning-tree mst instance-id priority priority
Step 3
end
Step 4
show spanning-tree mst instance-id
Step 5
copy running-config startup-config
To return the switch to its default setting, use the no spanning-tree mst instance-id priority global
configuration command.

Configuring the Hello Time

You can configure the interval between the generation of configuration messages by the root switch by
changing the hello time.
Exercise care when using this command. For most situations, we recommend that you use the
Note
spanning-tree mst instance-id root primary and the spanning-tree mst instance-id root secondary
global configuration commands to modify the hello time.
78-14982-01
Purpose
Enter global configuration mode.
Configure the switch priority for an MST instance.
• For instance-id, the range is 0 to 15.
• For priority, the range is 0 to 61440 in increments of
4096; the default is 32768. The lower the number, the
more likely the switch will be chosen as the root switch.
Valid priority values are 0, 4096, 8192, 12288, 16384,
20480, 24576, 28672, 32768, 36864, 40960, 45056,
49152, 53248, 57344, and 61440. All other values are
rejected.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 2950 Desktop Switch Software Configuration Guide
Configuring RSTP and MSTP Features
12-19