User Manual

User’s Manual of LRP-822CS/LRP-1622CS
150
Contro
l 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.
 BPDU Guard
 P2P MAC
Controls whether the port connects to a point-to-point LAN rather than a shared
ined, or forced either true or false.
is faster for point-to-point LANs than for shared
media.
y. Aggregations are always forced Point2Point).
medium. This can be automatically determ
Transition to the forwarding state
(This applies to physical ports onl
 Migrate
If at any time the switch detects STP BPDUs, including Configuration or Topology
tically 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)
Change Notification BPDUs, it will automa
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 IEEE 802.1D-1998 IEEE 802.1w-2001
Ethernet
50-600 200,000-20,000,000
Fast Ethernet
10-60 20,000-2,000,000
Gigabit Ethernet
3-10 2,000-200,000
T commended STP Path Cost Range able 4-6-1 Re
Port Type Link Type IEEE 802.1D-1998 IEEE 802.1w-2001
Ethernet
Half D
Full D
Trunk
uplex
uplex
100
95
90
2,000,000
1,999,999
1,000,000
Fast Ethernet
Half D
Full D
Trunk
100,000
uplex
uplex
19
18
200,000
15 50,000
Gigabit Ethernet
Full D
Trunk
10,000 uplex 4
3 5,000
Table 4-6-2 Recommended STP Path Costs