Operation Manual

93
Port Settings
STP and RSTP help guard against the formation of loops
in an Ethernet network topology. A loop occurs when
nodes transmit packets to each other over more than
one data path. Packets can become caught in repetitious
cycles that needlessly consume network bandwidth
whichthensignicantlyreducenetworkperformance.
With STP, you can set it up on a port per port basis
totofurtherhelpcongureyournetworktopology.
The Switch allows each port to have its own spanning
tree,andsowillrequiresomeofitsownconguration
settings.
Port:
The port or trunked ports you wish to
congure.
External Path
Cost:
Thisdenesametricthatindicatesthe
relative cost of forwarding packets to
thespeciedportlist.Theportcostcan
be set automatically or as a metric value.
The default value is 0 (auto). Setting 0
for the external cost will automatically
set the speed for forwarding packets to
thespeciedport(s)inthelistforoptimal
efciency.Thedefaultportcostfora
100Mbps port is 200000 and the default
port cost for a Gigabit port is 20000. Enter
a value between 1 and 200000,000 to
determine the External Cost. The lower
the number, the greater the probability the
port will be chosen to forward packets.
Edge Port: Indicate whether the port is Enabled or
Disabled.
•Yes – Designates the port as an edge port.
• No – There is no edge port status.
P2P MAC:
A P2P port must operate in full duplex. Like
edge ports, P2P ports transition to a forwarding
staterapidly,thusbenetingfromRSTP.Enable
P2P for the device to establish a point-to-point
link, or specify for the device to automatically
establish a point-to-point link. Select Yes or No
from the list for point-to-point(P2P) .
• Yes – Restricted in that a P2P port must
operate in full-duplex.
• No –There is no P2P port status.
Migration
Start:
When operating in RSTP mode, enable this
function to force the port to use the new MST/
RST BPDUs and restart the migration delay
timer.