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ES42 Series Edge Switches Installation and User Guide (05/05)
network. The "cut-through" technique permits collision fragment frames, which are a result
of late collisions, to be forwarded--which add to the network traffic. There is no way to
filter frames with a bad CRC (the entire frame must be present in order for CRC to be
calculated). Since collisions and bad packets are more likely when traffic is heavy, store-
and-forward switch technology enables more bandwidth to be available for good packets
when the traffic load is greatest.
To minimize the possibility of dropping frames on congested ports, each
Magnum ES42 Series Edge Switch dynamically allocates buffer space from 128KB
memory pool, ensuring that heavily used ports receive very large buffer space for packet
storage. (Many other switches have their packet buffer storage space divided evenly across
all ports, resulting in a small, fixed number of packets to be stored per port. When the port
buffer fills up, dropped packets result.) This dynamic buffer allocation provides the
capability for the maximum resources of the Magnum ES42 Series unit to be applied to all
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