3Com 3C17705, User Manual

Page: 96 / 184

96 C
HAPTER
6: S
PANNING
T
REE
P
ROTOCOL
(STP)
STP Configuration
Example
The following example creates and enables an STPD named Backbone_st .
It assigns the Manufacturing VLAN to the STPD. It disables STP on ports 1
through 3, and port 6.
create stpd backbone_st
config stpd backbone_st add vlan manufacturing
enable stpd backbone_st
disable stpd backbone_st port 1-3,6
Displaying STP
Settings
To display STP settings, use the following command:
show stpd {<stpd_name>}
This command displays the following information:
■
STPD name
■
Bridge ID
■
STPD configuration information
config stpd <stpd_name> port cost
<value> <portlist>
Specifies the path cost of the port in this STPD.
The range is 1 through 65,535. The switch
automatically assigns a default path cost based on
the speed of the port, as follows:
■
For a 100Mbps port, the default cost is 19.
■
For a 1000Mbps port, the default cost is 4.
config stpd <stpd_name> port
priority <value> <portlist>
Specifies the priority of the port in this STPD. By
changing the priority of the port, you can make it
more or less likely to become the Root Port.
The range is 0 through 255. The default setting is
128. A setting of 0 indicates the lowest priority.
Table 23 STP Configuration Commands (continued)
Command Description