Transition Networks
SISGM
–CHAS L2/L3 Switch User Guide
33625 Rev. B
Page
42
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4.4.2
MSTP
Since the recovery time of STP and RSTP takes seconds, which are unacceptable in some
industrial applications, MSTP was developed. The technology supports multiple spanning trees
within a network by grouping and mapping multiple VLANs into different spanning-tree instances,
known as MSTIs, to form individual MST regions. Each switch is assigned to an MST region.
Hence, each MST region consists of one or more MSTP switches with the same VLANs, at least
one MST instance, and the same MST region name. Therefore, switches can use different paths in
the network to effectively balance loads.
Port Settings
This page allows you to examine and change the configurations of current MSTI ports. A MSTI port
is a virtual port, which is instantiated separately for each active CIST (physical) port for each MSTI
instance configured and applicable for the port. The MSTI instance must be selected before MSTI
port configuration options are displayed.
This page contains MSTI port settings for physical and aggregated ports. The aggregation settings
are stack global.
Select a MSTI instance from the dropdown and click the
Get
button.
