System information

SIGNAMAX a.s.
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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 Number 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. Edge Ports will immediately transit to
forwarding state and skip the listening and learning state because the edge ports
cannot create bridging loops in the network. This will expedite the convergence.
When the link on the edge port toggles, the STP topology keeps unchanged.
Unlike the designate port or root port though, an edge port will transit to a normal
spanning-tree port immediately if it receives a BPDU.
Default: No
Admin Point To Point:
We say a port is a point-to-point link, from RSTP’s view, if it is in full-duplex mode
but is shared link if it is in half-duplex mode. RSTP fast convergence can only
happen on point-to-point links and on edge ports. This can expedite the
convergence because this will have the port fast transited to forwarding state.
There are three parameters, Auto, True and False, used to configure the type of
the point-to-point link. If configure this parameter to be Auto, it means RSTP will
use the duplex mode resulted from the auto-negotiation. In today’s switched