GS-4210-Series (V2) User Manual

User’s Manual of GS-4210 Series
169
4.3.4.3 STP Port Setting
This page allows you to configure per port STP settings. The STP Port Setting screens in Figure 4-3-59 & Figure 4-3-60 appear.
Figure 4-3-59: STP Port Configuration Page Screenshot
The page includes the following fields:
Object Description
• Port Select
Select port number for this drop down list.
• External Cost (0 =
Auto)
Controls the path cost incurred by the port.
The Auto setting will set the path cost as appropriate by the physical link speed,
using the 802.1D recommended values. Using the Specific setting, a
user-defined value can be entered.
The path cost is used when establishing the active topology of the network.
Lower path cost ports are chosen as forwarding ports in favor of higher path cost
ports. Valid values are in the range 1 to 200000000.
• Edge Port
Controls whether the operEdge flag should start as beeing set or cleared. (The
initial operEdge state when a port is initialized).
• BPDU Filter
Control whether a port explicitly configured as Edge will transmit and receive
BPDUs.
• BPDU Guard
Control whether a port explicitly configured as Edge will disable itself upon
reception of a BPDU.
The port will enter the error-disabled state, and will be removed from the active
topology.
• P2P MAC
Controls whether the port connects to a point-to-point LAN rather than a shared
medium.
This can be automatically determined, or forced either true or false. Transition to
the forwarding state is faster for point-to-point LANs than for shared media.
(This applies to physical ports only. Aggregations are always forced Point2Point).
• Migrate
If at any time the switch detects STP BPDUs, including Configuration or
Topology Change Notification BPDUs, it will automatically set the selected
interface to forced STP-compatible mode.
However, you can also use the Protocol Migration button to manually re-check
the appropriate BPDU format (RSTP or STP-compatible) to send on the selected