Manufacture Technology GEFXL2-CSW28KX User Manual page 92

Parameter description:
Port:

The physical port index, available value is 1 to 24.
Instance :

Every MRSTP instance need to have a unique instance ID
Path Cost :

To evoke to select with "Auto" or "Specific", if you select Specific then you need
to assign the path cost value. The available range is from 1 to 200,000,000
The same definition as in the RSTP specification. But in MRSTP, this parameter
can be respectively applied to ports of CIST and ports of any MSTI.
Priority :

The available value: 0 / 16 / 32 / 48 / 64 / 80 / 96 / 112 / 128 / 144 / 160 /
176 / 192 / 208 / 224 / 240
The same definition as in the RSTP specification. But in MSTP, this parameter
can be respectively applied to ports of CIST and ports of any MSTI.
Admin Edge :

The parameter you can scroll to select "Edge/ None-Edge".
If user selects "Edge", 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: Edge.
Admin P2P :

The parameter you can scroll to select "Auto/ Force True/ Force False".
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, Force True and Force 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
Buttons

Save – Click to save changes.
Reset- Click to undo any changes made locally and revert to previously saved
values.
82 Publication date: March, 2012
Revision A1