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10/100 Auto Negotiation Switch User’s Guide
Managing the DES-3216
27
byte packets are delayed by 1200 microseconds in a Store and Forward device versus 60
microseconds in a Cut-Through device.
Store and Forward requires more memory because the DES-3216 must store the packet
before sending it out.
Advantages of Cut-Through
Cut-Through is faster because the packet is sent as soon as the first 128 bytes are received.
Cut-Through requires less memory since the DES-3216 only reads the address but does not
store the entire message.
Disadvantages of Cut-Through
Bad packets are perpetuated, taking up bandwidth.
The benefits diminish in high traffic networks.
Cut-Through can not be used on networks that use both Ethernet and Fast Ethernet. The
network must use one or the other.
Follow these steps to change the default setting from Store and Forward to Cut-Through:
1. Toggle the space bar to change the setting.
2. Select Save and press Enter.