Configuring Spanning Tree
Page 17-25

Configuring Spanning Tree Parameters

The stc command allows you to configure parameters for the spanning tree, and enable or
disable the Fast Spanning Tree feature for a VLAN. To configure these parameters:
1. Enter the stc command as follows:
stc <groupNumber>
where <groupNumber> is the number of the group in the switch for which you are config-
uring spanning tree. For example, to configure spanning tree for Group 2, you would
enter:
stc 2
2. The system shows you the current values and allows you to change them through a series
of prompts, the first of which is shown below:
Spanning Tree Parameters for Group 2 (New GROUP (#2))
Spanning Tree is OFF for this Group, set to ON ? (y/n) :
Enter y to enable spanning tree or n to leave it disabled and press <return>. This field
allows you to toggle spanning tree On or OFF by typing the appropriate response.
Answering Yes (y) selects the option opposite the currently selected option.
♦ Important Note ♦
Remember to read the prompt carefully before
responding. If spanning tree has already been acti-
vated for this group, this prompt will ask you if you
would like to turn it off.
3. The following prompt is displayed asking whether you would like to use IEEE or IBM
Spanning Tree:
IEEE spanning tree for this Group, set to IBM ? (y/n) :
Enter n to use IEEE Spanning Tree, or y to use IBM Spanning Tree, and press <return>.
Select either the IEEE 802.1d Spanning Tree or IBM Spanning Tree. Answering Yes (y)
changes the spanning tree type to the type not currently in use for this Group. The system
automatically sets defaults for later stc prompts, such as Bridge Hello Time and Bridge Max
Age, based on the spanning tree type you select here.
♦ Important Note ♦
Remember to read the prompt carefully before
responding. If IEEE Spanning Tree is what you would
like to use, the correct response to this prompt is no. A
yes response changes it to IBM Spanning Tree.