Fujitsu XG0224 - Basic Switch Functions; Switching Mode (XG2600)

XG Series User's Guide Chapter 4 Switch Functions and their Configuration
Basic Switch Functions
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4.1 Basic Switch Functions
This section describes the basic switch functions.
4.1.1 Switching Mode (XG2600)
XG2600 provides the following two switching modes.
XG0224 / XG0448 / XG0440DC / XG0440DCR provide store-and-forward switching modes only.
• Store-and-forward switching mode
After the device finishes receiving a frame, it checks the FCS (Frame Check Sequence) and performs a validity check
(on packet size, etc.) before forwarding the frame. If the switch receives a frame with an error frame, it discards it.
• Cut-through switching mode
The device transmits the frame to the destination as soon as the first 64 bytes of the frame are received with no errors.
Since the device starts transmitting the frame before it receives the entire frame, this mode allows forwarding at low
latency.
To change the switching modes, carry out the following procedures in "admin" Operation mode.
Command Task
XG2600# configure Switch to Configuration mode.
XG2600(config)# forwardingmode cut-through Select the (cut-through) for the switching mode.
XG2600(config)# forwardingmode store-and-forward Select the (store-and-forward) for the switching mode.
XG2600(config)# commit Apply the configuration.
XG2600(config)# save Save the configuration.
XG2600(config)# exit Switch to Operation mode.