Planet Networking & Communication MGSW-28240F User Manual page 159


BPDU Guard
 Point-to-Point
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 802.1w 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
administrator to prevent bridges external to a core region of the network, causing
address flushing in that region, possibly because those bridges are not under the
full control of the administrator or the physical link state of the attached LANs
transits frequently.
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 effect this setting.
A port entering error-disabled state due to this setting is subject to the bridge Port
Error Recovery setting as well.
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. All means all ports will have one specific setting.
IEEE 802.1D-1998
50-600
10-60
3-10
Table 4-7-1: Recommended STP Path Cost Range
Link Type IEEE 802.1D-1998
Half Duplex 100
Full Duplex 95
Trunk 90
Half Duplex 19
Full Duplex 18
Trunk 15
Full Duplex 4
Trunk 3
Table 4-7-2: Recommended STP Path Costs
User's Manual of MGSW-MGSD Series
IEEE 802.1w-2001
200,000-20,000,000
20,000-2,000,000
2,000-200,000
159
IEEE 802.1w-2001
2,000,000
1,999,999
1,000,000
200,000
100,000
50,000
10,000
5,000