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122
VLAN advanced configuration
CIST port status display parameters
The following section describes the display parameters for the CIST port status located at
Configuration,
Variable definitions
The following table describes the variables and values displayed on the MSTP CIST Port Status
panel.
Variable
Port
Port Name
Designated Root
Designated Bridge
Designated Port
Designated Cost
Regional Root
Regional Path Cost
Type
Role
Port State
RSTP configuration
RSTP provides rapid recovery of connectivity when a bridge/bridge port or a local area network
(LAN) fails. RSTP avoids the delay by calculating an alternate root port and immediately
switching over to it, if available. Using RSTP, the switch immediately brings the alternate port to
the forwarding state without the delays caused by the listening and learning states.
Prerequisites to RSTP configuration
•
You must disable MSTP and enable RSTP before configuring RSTP. See
configuration parameters (page
NN47928-500
NN47928-500
Spanning Tree, MSTP, CIST Port Status tab
Value
Displays the port number.
Displays the port name.
Displays the unique Bridge Identifier of the Bridge recorded as the Root for
the segment to which the port is attached.
Displays the Bridge Identifier which this port considers to be the
Designated Bridge for this port segment.
Displays the Port Identifier on the Designated Bridge for this port segment.
Displays the path cost of the Designated Port of the segment connected to
this port.
Displays the unique Bridge Identifier recorded as the CIST Regional Root
Identifier in the transmitted configuration BPDUs.
Displays the port contribution to the path cost of paths towards the CIST
Regional Root, which includes this port.
Displays the operational point-to-point status of the LAN segment
attached to this port. The status indicates whether a port is considered to
have a point-to-point connection or Shared media.
Displays the current role of the port as defined by the Spanning Tree
Protocol (STP).
Displays the current state of the port as defined by the application of the
STP.
117).
.
STP basic settings
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