Redundancy
RM Web L3E
Release
6.0
07/2010
7.5
Spanning Tree
193
Dialog Tab MSTP Global (CIST)
This tab in the dialog allows you to configure the MST region and the
global Multiple Spanning Tree Instance (IST) within the MST region, and
to display information on IST and CST.
Note: Configure all the bridges of an MST region with identical values for:
– the MST Region Identifier,
– the Revision Level and
– the mapping of the VLANs to the MSTP instances.
Note: Include the ports that connect the bridges of an MST region as
tagged members in all the VLANs that are set up on the bridges. You thus
avoid potential connection breaks when the topology is changed within
the MST region.
Also include the ports that connect an MST region with other MST regions
or with the CST region (known as boundary ports) as tagged members in
all the VLANs that are set up on both regions. You thus avoid potential
connection breaks when topology changes affecting the boundary ports
are made.
Parameter Meaning Possible Values Default Setting
Frame „MST Region
Identifier“
Information on the global MST
instance
Name Name of the MSTP region to
which the device belongs.
Max.
32 characters,
value 0x21 (!) up
to and incl. 0x7e
(~)
The MAC
address of the
device.
Revision level Version number of the MSTP
region to which the device
belongs.
0 -65,535 0
Digest The MD5 checksum of the MSTP
configuration.
16 bytes in
hexadecimal.
Table 85: Dialog Multiple Spanning Tree settings, MST Global, MST region identifier
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