IFS NS3502-8P-2S User Manual
154
the administrator or the physical link state of the attached LANs
transits frequently.
•
BPDU Guard
If enabled, causes the port to disable itself upon receiving valid
BPDU's. Contrary to the similar bridge setting, the port
Edge
status does not affect this setting.
A port entering error-disabled state due to this setting is subject
to the bridge Port Error Recovery setting as well.
•
Point2Point
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. A transition to the
forwarding state is faster for point-to-point LANs than for shared
media.
Buttons
: Click to save changes.
: Click to undo any changes made locally and revert to previously saved values.
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
Table 4-7-1
Recommended STP Path Cost Range
Port Type
Link Type
IEEE 802.1D-1998
IEEE 802.1w-2001
Ethernet
Half Duplex
Full Duplex
Trunk
100
95
90
2,000,000
1,999,999
1,000,000
Fast Ethernet
Half Duplex
Full Duplex
Trunk
19
18
15
200,000
100,000
50,000
Gigabit Ethernet
Full Duplex
Trunk
4
3
10,000
5,000
Table 4-7-2:
Recommended STP Path Costs
