GarrettCom 4K-Series Manual De Usuario

Magnum 4K8 Switches      Installation and User Guide      (10/04) 

 

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Another feature implemented in Magnum 4K8 Switches is a collision-based 

flow-control mechanism (when operating at half-duplex only). When the Switch detects 

that its free buffer queue space is low, the Switch prevents more frames from entering by 

forcing a collision signal on all receiving half-duplex ports in order to stop incoming 

traffic. 

 

The latency (the time the frame spends in the Switch before it is sent along or 

forwarded to its destination) of the 4K8 Switches varies with the port-speed types, and 

the length of the frame is a variable here as it is with all store-and-forward switches.  For 

10 Mb-to-10 Mb or 10 Mb-to-100Mb or 100Mb-to-10 Mb forwarding, the latency is 15 

microseconds plus the packet time at 10 Mb.  For 100Mb-to-100Mb forwarding, the 

latency is 5 microseconds plus the packet time at 100Mb.