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BPDU Guard
P2P MAC
Migrate
Buttons
: Click to apply changes.
By default, the system automatically detects the speed and duplex mode used on each port, and configures the path cost
according to the values shown below. Path cost "0" is used to indicate auto-configuration mode. When the short path cost
method is selected and the default path cost recommended by the IEEE 8021w standard exceeds 65,535, the default is set to
65,535.
Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet
Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet
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.
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).
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 interfaces.
(Default: Disabled)
IEEE 802.1D-1998
50-600
10-60
3-10
Table 4-6-1 Recommended STP Path Cost Range
Link Type
Half Duplex
Full Duplex
Trunk
Half Duplex
Full Duplex
Trunk
Full Duplex
Trunk
Table 4-6-2 Recommended STP Path Costs
IEEE 802.1w-2001
200,000-20,000,000
20,000-2,000,000
2,000-200,000
IEEE 802.1D-1998
100
95
90
19
18
15
4
3
147
User's Manual of LRP-822CS
IEEE 802.1w-2001
2,000,000
1,999,999
1,000,000
200,000
100,000
50,000
10,000
5,000
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