ZyXEL Communications XGS-4728F User Manual page 142

Chapter 13 Spanning Tree Protocol
Table 34 Advanced Application > Spanning Tree Protocol > MSTP (continued)
LABEL
Bridge Priority
VLAN Range
Enabled
VLAN(s)
Port
*
Active
Priority
Path Cost
Add
Cancel
Instance
VLAN
Active Port
142
DESCRIPTION
Set the priority of the Switch for the specific spanning tree instance. The
lower the number, the more likely the Switch will be chosen as the root
bridge within the spanning tree instance.
Enter priority values between 0 and 61440 in increments of 4096 (thus
valid values are 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344 and 61440).
Enter the start of the VLAN ID range that you want to add or remove
from the VLAN range edit area in the Start field. Enter the end of the
VLAN ID range that you want to add or remove from the VLAN range
edit area in the End field.
Next click:
• Add - to add this range of VLAN(s) to be mapped to the MST
instance.
• Remove - to remove this range of VLAN(s) from being mapped to
the MST instance.
• Clear - to remove all VLAN(s) from being mapped to this MST
instance.
This field displays which VLAN(s) are mapped to this MST instance.
This field displays the port number.
Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all
ports. Use this row first to set the common settings and then make
adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you
make them.
Select this check box to add this port to the MST instance.
Configure the priority for each port here.
Priority decides which port should be disabled when more than one port
forms a loop in the Switch. Ports with a higher priority numeric value
are disabled first. The allowed range is between 0 and 255 and the
default value is 128.
Path cost is the cost of transmitting a frame on to a LAN through that
port. It is recommended to assign this value according to the speed of
the bridge. The slower the media, the higher the cost - see
page 126 for more information.
Click Add to save this MST instance to the Switch's run-time memory.
The Switch loses this change if it is turned off or loses power, so use the
Save link on the top navigation panel to save your changes to the non-
volatile memory when you are done configuring.
Click Cancel to begin configuring this screen afresh.
This field displays the ID of an MST instance.
This field displays the VID (or VID ranges) to which the MST instance is
mapped.
This field display the ports configured to participate in the MST instance.
Table 27 on
XGS-4728F User's Guide