SH-E514TR1 10 Gigabit Ethernet SmartPro Switch User Manual
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Figure 9-14 STP Port Settings
The fields that can be configured are described below:
From Port / To Port:
Select the appropriate port range used for the configuration here.
Cost:
Enter the cost value here. This value must be between 1 and 200000000. This value defines a metric that
indicates the relative cost of forwarding packets to the specified port list. 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 specified port(s) in the list for optimal efficiency. The default port cost for a 100Mbps port is
200000 and the default port cost for a Gigabit port is 20000. The lower the number, the greater the probability the port
will be chosen to forward packets.
State:
Enable or disable the STP port state.
Guard Root:
Enable or disable the guard root function.
Link Type:
Select the link type option here. Options to choose from are
Auto
,
P2P
, and
Shared
. A full-duplex port is
considered to have a point-to-point (
P2P
) connection. On the opposite, a half-duplex port is considered to have a
Shared
connection .The port cannot transit into the forwarding state rapidly by setting the link type to
Shared
. By
default this option is
Auto
.
Port Fast:
Select the port fast option here. Options to choose from are
Network
,
Disabled
, and
Edge
. In the
Network
mode, the port will remain in the non-port-fast state for three seconds. The port will change to the port-fast
state if no BPDU is received and changes to the forwarding state. If the port received the BPDU later, it will change to
the non-port-fast state. In the
Disabled
mode, the port will always be in the non-port-fast state. It will always wait for
the forward-time delay to change to the forwarding state. In the
Edge
mode, the port will directly change to the
spanning-tree forwarding state when a link-up occurs without waiting for the forward-time delay. If the interface
receives a BPDU later, its operation state changes to the non-port-fast state. By default, this option is Network.
TCN Filter:
Enable or disable the TCN filter option. Enabling TC filtering on a port is useful for an ISP to prevent the
external bridge to a core region of the network, causing address flushing in that region, possibly because those
bridges are not under the full control of the administrator. When a port is set to the TCN filter mode, the TC event
received by the port will be ignored. By default, this option is
Disabled
.
Priority:
Select the priority value here. Options to choose from are 0 to 240. By default this option is 128. A lower
value has higher priority.
Click
Apply
to accept the changes made.
