Microsens MS453522M - Manual (Page 108)

MICROSENS 8 Port Gigabit Ethernet Switch User’s Manual
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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 networks, most
links are running in full-duplex mode. For sure, the result may be half-duplex, in this
case, the port will not fast transit to Forwarding state. If it is set as True, the port is
treated as point-to-point link by RSTP and unconditionally transited to Forwarding
state. If it is set as False, fast transition to Forwarding state will not happen on this
port.
Default: Auto