Advantech EKI-9312P Series, User Manual

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M
ANAGEMENT
I
NTERFACE
Table 3-115. Switching > Spanning Tree > CST Interface Configuration/Status (Continued)
Parameter Description
Port Mode Click the drop-down menu to enable or disable the Spanning Tree Protocol Admin-
istrative Mode associated with the port or port channel. The possible values are
Enable or Disable. It is disabled by default.
Port Forwarding Displays the State of this port (Forwarding/Learning/Discarding/Manual forwarding/
State Not participating/Disabled). * indicates Loop inconsistent state. Refer to Loop
Guard for more information.
Port Role Displays each MST Bridge Port that is enabled is assigned a Port Role for each
spanning tree. The port role will be one of the following values: Root Port, Desig-
nated Port, Alternate Port, Backup Port, Master Port or Disabled Port.
Designated Root Displays the Root Bridge for the CST. It is made up using the bridge priority and the
base MAC address of the bridge.
Designated Cost Displays the path cost offered to the LAN by the Designated Port.
Designated Bridge Displays the bridge identifier of the bridge with the Designated Port. It is made up
using the bridge priority and the base MAC address of the bridge.
Designated Port Displays the port identifier on the Designated Bridge that offers the lowest cost to
the LAN. It is made up from the port priority and the interface number of the port.
Topology Change Displays the next BPDU to be transmitted for this port would have the topology
Acknowledge change acknowledgement flag set. It is either "True" or "False".
Auto Edge Click the drop-down menu to enable or disable the auto edge of a port allows the
port to become an edge port if it does not see BPDUs for some duration. The pos-
sible values are Enable or Disable. It is disabled by default.
Edge Port Displays the status of the edge port (enabled or disabled). It takes the value
"Enabled" or "Disabled".
Point-to-point MAC Displays the derived value of the point-to-point status.
Root Guard Click the drop-down menu to enable or disable the root guard mode sets a port to
discard any superior information received by the port and thus protect against root
of the device from changing. The port gets put into discarding state and does not
forward any packets. The possible values are Enable or Disable. It is disabled by
default.
Loop Guard Click the drop-down menu to enable or disable the loop guard mode prevents a
port from erroneously transitioning from blocking state to forwarding when the port
stops receiving BPDUs. The port is marked as being in loop-inconsistent state. In
this state, the port does not forward packets. The possible values are Enable or
Disable. It is disabled by default.
TCN Guard Click the drop-down menu to enable or disable the TCN guard for a port restricts
the port from propagating any topology change information received through that
port. The possible values are Enable or Disable. It is disabled by default.
CST Regional Root Displays the bridge identifier of the CST Regional Root. It is made up using the
bridge priority and the base MAC address of the bridge.
CST Path Cost Displays the path cost to the CST Regional Root.
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