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EKI-9500 Series User Manual
resulting in rapid transitioning of the port to 'Forwarding' state and the suppression of
Topology Change Notification. These features are represented by the parameters
'pointtopoint' and 'edgeport'. MSTP is compatible to both RSTP and STP. It behaves
appropriately to STP and RSTP bridges. A MSTP bridge can be configured to
behave entirely as a RSTP bridge or a STP bridge.
4.4.19.1
Switch
The Spanning Tree Switch Configuration page contains fields for enabling STP on
the switch.
To access this page, click
Switching
>
Spanning Tree
>
Switch
.
Figure 4.246 Switching > Spanning Tree > Switch
The following table describes the items in the previous figure.
Note!
For two bridges to be in the same region, the force version should be
802.1S and their configuration name, digest key, and revision level
should match. For more information about regions and their effect on
network topology, refer to the IEEE 802.1Q standard.
Item
Description
Spanning Tree
Admin Mode
The administrative mode of STP on the device. When enabled, the
device participates in the root bridge election process and exchanges
Bridge Protocol Data Units (BPDUs) with other switches in the span-
ning tree to determine the root path costs and maintain topology infor-
mation.
Force Protocol Ver-
sion
The STP version the device uses, which is one of the following:
IEEE 802.1d: Classic STP provides a single path between end
stations, avoiding and eliminating loops.
IEEE 802.1w: Rapid Spanning Tree Protocol (RSTP) behaves
like classic STP but also has the ability to configure and recog-
nize full-duplex connectivity and ports that are connected to end
stations, resulting in rapid transitioning of the port to the Forward-
ing state and the suppression of Topology Change Notifications.
IEEE 802.1s: Multiple Spanning Tree Protocol (MSTP) includes
all the advantages of RSTP and also supports multiple spanning
tree instances to efficiently channel VLAN traffic over different
interfaces. MSTP is compatible with both RSTP and STP.
Configuration Name The name of the MSTP region. Each switch that participates in the
same MSTP region must share the same Configuration Name, Config-
uration Revision Level, and MST-to-VLAN mappings.
Configuration Revi-
sion Level
The revision number of the MSTP region. This number must be the
same on all switches that participate in the MSTP region.
Configuration Digest
Key
The 16 byte signature of type HMAC-MD5 created from the MST Con-
figuration Table (a VLAN ID-to-MST ID mapping).
Configuration For-
mat Selector
The version of the configuration format being used in the exchange of
BPDUs.
Submit
Click
Submit
to save the values and update the screen.
