User manual

- 756 -
Admin Edge Port - Specifies if the specified port is an Edge Port within the CIST. It takes a value of
Enable or Disable, where the default value is Disable.
BPDU Guard - Specifies whether BPDU Guard is enabled for the Common and Internal Spanning
tree (CST). Value is enabled or disabled
BPDU Filter - Specifies whether BPDU Filter is enabled for the Common and Internal Spanning tree
(CST). Value is enabled or disabled
Port Mode - Spanning Tree Protocol Administrative Mode associated with the port or port channel.
The possible values are Enable or Disable.
Auto Edge
- Configuring the auto edge mode of a port allows the port to become an edge port if it
does not see BPDUs for some duration. The possible values are Enable or Disable.
Root Guard
- Configuring 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.
Loop Guard
- Configuring 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.
TCN Guard
- Configuring 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.
Configurable Data
Port Priority - The priority for a particular port within the CST. The port priority is set in multiples of
16. For example, if you attempt to set the priority to any value between 0 and 15, it will be set to 0. If
you attempt to set any value between 16 and (2*16-1) it will be set to 16 and so on.
Port Path Cost - Set the Path Cost to a new value for the specified port in the common and internal
spanning tree. It takes a value in the range of 1 to 200000000.
External Port Path Cost - Set the External Path Cost to a new value for the specified port in the
spanning tree. It takes a value in the range of 1 to 200000000.
Non-Configurable Data
Auto-calculate Port Path Cost - Displays whether the path cost is automatically calculated
(Enabled) or not (Disabled). Path cost will be calculated based on the link speed of the port if the
configured value for Port Path Cost is zero.
Auto-calculate External Port Path Cost - Displays whether the external path cost is automatically
calculated (Enabled) or not (Disabled). External Path cost will be calculated based on the link speed
of the port if the configured value for External Port Path Cost is zero.
BPDU Guard Effect – Displays whether BPDU Guard Effect is enabled or disabled.
Port ID - The port identifier for the specified port within the CST. It is made up from the port priority
and the interface number of the port.
Port Up Time Since Counters Last Cleared - Time since the counters were last cleared, displayed
in Days, Hours, Minutes, and Seconds.
Port Forwarding State - The Forwarding State of this port.
Port Role - 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, Designated Port, Alternate Port, Backup Port,
Master Port, or Disabled Port.
Designated Root - Root Bridge for the CST. It is made up using the bridge priority and the base MAC
address of the bridge.
Designated Cost - Path Cost offered to the LAN by the Designated Port.