Supermicro SSE-F3548S - 6.20 Port Fast

Supermicro SSE-F3548S/SSE-F3548SR Configuration User’s Guide
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SMIS(config-if)# spanning-tree restricted-tcn
SMIS(config-if)# end
6.20 Port Fast
When a port link is up, spanning tree does not allow the port to forward the packets immediately.
Spanning tree moves the port through the listening and learning states before reaching the forwarding
state. This state machine function helps achieve a loop-free topology, but delays the port operation of
forwarding traffic.
Switch ports connected to computers and servers are not expected to cause any loops. Those ports can be
configured with the port fast feature to start forwarding traffic immediately instead of waiting through
the learning and listening states.
Configure the port fast feature only to ports that are connected to computers and servers.
Configuring port fast on ports that are connected to other switches might cause network
loops.
The port fast feature is disabled on all ports by default.
Follow the steps below to enable the port fast feature on the ports.
Step
Command
Description
Step 1
configure terminal
Enters the configuration mode
Step 2
interface <interface-type><interface-id>
or
interface range <interface-type><interface-id> ….
Enters the port interface mode.
interface-type – may be any of the
following:
fx-ethernet – fx
cx-ethernet – cx
port-channel – po
interface-id is in slot/port format for all
physical interfaces. It may be the port
channel identifier for port channel
interfaces.
To configure multiple interfaces, use
the “interface range …” command. To
provide a range use a hypen (-)
between the start and end interface
numbers.
E.g.: int range fx 0/1-10
To provide multiple interfaces or
ranges, use separate with a comma (,).
E.g.: int range fx 0/1-10, fx 0/20
Step 3
spanning-tree portfast
Enables the port fast feature.