User`s guide

Signamax 065-7840 24-Port 10/100/1000BaseT/TX Managed Switch
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3-13-3. STP Port Configuration
Function name:
STP Port Setting
Function description:
In the STP Port Setting, one item selection and five parameter settings are
available for the user to configure as desired.. The user can disable and
enable each port by selecting each Port Status item. The user also can set
“Path Cost” and “Priority” of each port by filling in the desired value and set
“Admin Edge Port” and “Admin Point To Point” by selecting the desired item.
Parameter description:
Port Status:
It displays the current state of a port. We cannot manually set it because
it displays only the status. There are three possible states (according to
the 802.1w specification):
 The DISCARDING state indicates that this port can neither forward
packets nor contribute learning knowledge.
Notice: Three other states (Disable state, BLOCKING state and LISTENING
state) defined in the 802.1d specification are now all represented as
DISCARDING state.
 The LEARNING state indicates this port can now contribute its learning
knowledge but still cannot forward packets.
 The FORWARDING state indicates this port can both contribute its
learning knowledge and forward packets normally.
Path Cost Status:
Path Cost Status is the contribution value of the path through this port to
the Root Bridge. The STP algorithm determines a best path to the Root
Bridge by calculating the sum of the path costs contributed by all ports on
this path. A port with a smaller path cost value would more probably
become the Root Port.
Configured Path Cost:
The valid range is 0 – 200,000,000. In the switch, if the path cost is set to
zero, the STP will get the recommended value resulting from auto-
negotiation of the link accordingly and display this value in the Path Cost
Status field. Otherwise, it may show the value that the administrator set
up in Configured Path Cost and Path Cost Status.