AirLive SNMP-24MGB - Manual (Page 156)

4. Web Management in SNMP-24MGB
149
AirLive SNMP-24MGB User’s Manual
Parameter description:
Port Status:
It displays the current state of a port. We cannot manually set it because it
displays the status only. There are three possible states. (According to 802.1w
specification)
z
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.
z LEARNING state indicates this port can now contribute its learning
knowledge but cannot forward packets still.
z FORWARDING state indicates this port can both contribute its learning
knowledge and forward packets normally.
Path Cost Status:
It is the contribution value of the path through this port to Root Bridge. STP
algorithm determines a best path to Root Bridge by calculating the sum of path
cost contributed by all ports on this path. A port with a smaller path cost value
would become the Root Port more possibly.
Configured Path Cost:
The range is 0 – 200,000,000. In the switch, if path cost is set to be zero, the STP
will get the recommended value resulted from auto-negotiation of the link
accordingly and display this value in the field of Path Cost Status. Otherwise, it
may show the value that the administrator set up in Configured Path Cost and