Lancom ES-2126+ Manual page 82

Chapter 4: Operation of Web- based Management
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 sta-
tes. ( according to 802.1w specification)
DISCARDING state indicates that this port can neither forward
packets nor contribute learning knowledge.
Notice: Three other states (Disable state, BLOCKING state and LIS-
TENING state) defined in the 802.1d specification are now all rep-
resented as DISCARDING state.
LEARNING state indicates this port can now contribute its lear-
ning knowledge but cannot forward packets still.
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 Path Cost
Status.
802.1w RSTP recommended value: (Valid range: 1 – 200,000,000)
10 Mbps : 2,000,000
100 Mbps : 200,000
1 Gbps : 20,000
Default: 0
Priority: Priority here means Port Priority. Port Priority and Port Num-
ber are mixed to form the Port ID. Port IDs are often compared in
order to determine which port of a bridge would become the Root
Port. The range is 0 – 240.
Default is 128.
Admin Edge Port: If user selects "Yes", this port will be an edge port.
An Edge Port is a port connected to a device that knows nothing
about STP or RSTP. Usually, the connected device is an end station.
LANCOM ES-2126+ und LANCOM ES-2126P
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