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How does Link Fragmentation and Interleaving (LFI) work?

April 26, 2017fragmentation interleaving lfi link

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How does Link Fragmentation and Interleaving (LFI) work?

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A. Interactive traffic such as Telnet and Voice over IP is susceptible to increased latency when the network processes large packets such as File Transfer Protocol (FTP) transfers over a WAN. Packet delay for interactive traffic is significant when the FTP packets are queued on slower WAN links. A method was devised for fragmenting larger packets, and queueing the smaller (voice) packets between the fragments of the larger packets (FTP) packets. Cisco IOS routers support several layer 2 fragmentation mechanisms.