AirLive SNMP-24MGB - Manual (Page 157)

4. Web Management in SNMP-24MGB
AirLive SNMP-24MGB v2 User’s Manual 150
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
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
M Check:
Migration Check. It forces the port sending out an RSTP BPDU instead of a legacy
STP BPDU at the next transmission. The only benefit of this operation is to make
the port quickly get back to act as an RSTP port. Click <M Check> button to send
a RSTP BPDU from the port you specified.