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xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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The following parameters can be viewed or set:
Parameter Description
MSTI ID
Displays the MSTI ID of the instance being modified. An entry of 0 in this field denotes the
CIST (default MSTI).
Type
The Type field in this window will be permanently set to Set Priority Only.
Priority (0-61440)
Enter the new priority in the Priority field. The user may set a priority value between 0-
61440.
Click Apply to implement the new priority setting.
STP Port Settings
Figure 7- 43. STP Port Settings window
STP can be set up on a port per port basis.
To view the STP Port Settings window
click L2 Features > Spanning Tree >
STP Port Settings.
In addition to setting Spanning Tree
parameters for use on the switch level, the
Switch allows for the configuration of
groups of ports, each port-group of which
will have its own spanning tree, and will
require some of its own configuration
settings. An STP Group will use the
switch-level parameters entered above,
with the addition of Port Priority and Port
Cost. An STP Group spanning tree works
in the same way as the switch-level
spanning tree, but the root bridge concept is
replaced with a root port concept. A root
port is a port of the group that is elected
based on port priority and port cost, to be
the connection to the network for the
group. Redundant links will be blocked,
just as redundant links are blocked on the
switch level. The STP on the switch level
blocks redundant links between switches
(and similar network devices). The port
level STP will block redundant links within
an STP Group.
It is advisable to define an STP Group to
correspond to a VLAN group of ports.