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Chapter 40 MSTP Commands
Ethernet Switch CLI Reference Guide
156
This example adds the Switch to the MST region MSTRegionNorth. MSTRegionNorth is on
revision number 1. In MSTRegionNorth, VLAN 2 is in MST instance 1, and VLAN 3 is in
MST instance 2.
TopoChange This field indicates whether or not the current topology is stable.
0: The current topology is stable.
1: The current topology is changing.
DesignatedRoot This field displays the unique identifier for the root bridge, consisting of
bridge priority plus MAC address.
RootPathCost This field displays the path cost from the root port on this Switch to the root
switch.
RootPort This field displays the priority and number of the port on the Switch through
which this Switch must communicate with the root of the Spanning Tree.
RootMaxAge This field displays the maximum time (in seconds) the root switch can wait
without receiving a configuration message before attempting to reconfigure.
RootHelloTime This field displays the time interval (in seconds) at which the root switch
transmits a configuration message.
RootForwardDelay This field displays the time (in seconds) the root switch will wait before
changing states (that is, listening to learning to forwarding).
BridgeMaxAge This field displays the maximum time (in seconds) the Switch can wait
without receiving a configuration message before attempting to reconfigure.
BridgeHelloTime This field displays the time interval (in seconds) at which the Switch
transmits a configuration message.
BridgeForwardDelay This field displays the time (in seconds) the Switch will wait before
changing states (that is, listening to learning to forwarding).
ForceVersion This field indicates whether BPDUs are RSTP (a value less than 3) or
MSTP (a value greater than or equal to 3).
TransmissionLimit This field displays the maximum number of BPDUs that can be transmitted
in the interval specified by BridgeHelloTime.
CIST_RRootID This field displays the unique identifier for the CIST regional root bridge,
consisting of bridge priority plus MAC address.
CIST_RRootPathCost This field displays the path cost from the root port on this Switch to the
CIST regional root switch.
sysname# configure
sysname(config)# mstp
sysname(config)# mstp configuration-name MSTRegionNorth
sysname(config)# mstp revision 1
sysname(config)# mstp instance 1 vlan 2
sysname(config)# mstp instance 2 vlan 3
sysname(config)# exit
Table 93 show mstp instance (continued)
LABEL DESCRIPTION