Ip Fragmentation And Reassembly; Ip Fragmentation And Reassembly Overview; Ip Fragmentation/Reassembly Cli Commands - Avaya P333R-LB Installation And Configuration Manual

Chapter 12 Avaya P330 Layer 3 Features

IP Fragmentation and Reassembly

IP Fragmentation and Reassembly Overview

The P330 supports IP Fragmentation and Reassembly. This feature allows the router
to send and receive large IP packets where the underlying data link protocol
constrains MTU (maximum transport unit).
IP fragmentation involves breaking a datagram into a number of pieces that can be
reassembled later. The IP source, destination, identification, total length, and
fragment offset fields, along with the "more" fragment and "don't" fragment flags in
the IP header, are used for IP fragmentation and reassembly.
IP Fragmentation works as follows:
• IP packet is divided into fragments
• each fragment becomes its own IP packet
• each packet has same identifier, source, destination address
• fragments are usually not reassembled until final destination

IP Fragmentation/Reassembly CLI Commands

In order to...
Clear the fragment database and
restore its defaults
Set the maximum number of
fragments that can comprise a
single IP packet
Set the maximum number of
fragmented IP packets, destined for
the router, to reassemble at any
given time
Set the maximum number of
seconds to reassemble a
fragmented IP packet destined for
the router.
Display information regarding
fragmented IP packets that are
destined for the router
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Use the following command...
clear fragment
fragment chain
fragment size
fragment timeout
show fragment
Avaya P333R-LB User's Guide