14.
Multiple Spanning Tree Protocol (MSTP)
MN700004 Rev 01
165
=====================================================================
Port |Pri|Prt role|State|PCost |DCost |Designated bridge |DPrt
--------+---+--------+-----+------+-------+------------------+-------
01/01/02 128 Boundary block 200000 0 32768.00A0120B0AFA 128.002
Table 14-10 MSTP Show Command Parameters
P a r a m e t e r D e s c r i p t i o n
Multiple spanning trees
Indicates whether MSTP is enabled or disabled on the switch.
ProtocolSpecification
Displays the supported IEEE standard..
Priority
The bridge priority which is part of the bridge identifier.
TimeSinceTopologyChange
The count in seconds since tcWhile timer (Topology-Change
State Machine timer, specified in IEEE 802.1s, 13.21) for any
Port was non-zero.
TopChanges
The number of topology changes detected for all the MSTIs.
CIST Root
The CIST Regional Root Identifier. The Bridge Identifier of the
current CIST Regional Root.
CIST Port
The port in the switch from which the traffic flows to the CIST
root.
CIST Cost
The CIST Path Cost. The CIST path cost from the transmitting
Bridge to the CIST Regional Root.
MaxAge
The maximum age in seconds of received protocol information
before it is discarded.
HelloTime
The time interval in seconds between the transmissions of
Configuration BPDUs by a Bridge that is attempting to become
the Root or is the Root.
ForwardDelay
The forward time for all MST instances. The forward delay is
the number of seconds a port waits before changing from its
spanning-tree learning and listening states to the forwarding
state.
BridgeMaxAge
The value of the Max Age parameter in seconds when the
Bridge is the Root or is attempting to become the Root.
BridgeHelloTime
The value of the Hello Time parameter in seconds when the
Bridge is the Root or is attempting to become the Root.
This parameter is the time interval between transmissions of
Topology Change Notification BPDUs towards the Root, when
the Bridge is attempting to notify the Designated Bridge on the
LAN to which its Root Port is attached of a topology change.
BridgeForwardDelay
The value of the Forward Delay parameter in seconds when
the Bridge is the Root or is attempting to become the Root.
ProtoMigratioDelay
This value is used by the Protocol Migration Machine to limit
transition between the port's states.