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Conference 7.286::fddi

Title:	FDDI - The Next Generation

Moderator:	NETCAD::STEFANI

Created:	Thu Apr 27 1989
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2259
Total number of notes:	8590

94.0. "IP Fragmentation" by HAMPS::PRUDEN_G () Mon Jul 23 1990 07:05

    Could anyone explain why and how IP fragmentation works. I understand
    the theory of IP fragmentation but do not understand why it needs
    to be done going from Ethenret - FDDI - Ethernet. Any documentation
    on the subject would also be helpful
    
    						Gary

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94.1 KONING::KONING NI1D @FN42eq Mon Jul 23 1990 16:40 8

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94.1		KONING::KONING	NI1D @FN42eq	`Mon Jul 23 1990 16:40`	8
	You're right, in that situation it does not need to be done. It is needed for the case FDDI - Ethernet - FDDI. That may sound like a strange case, but it applies when you have small clumps of high end workstations on FDDI, each connected to an existing Ethernet building backbone. If you talk from one clump to the other, the transport layer (TCP) would select FDDI-sized packets. paul

You're right, in that situation it does not need to be done.  It is needed
for the case FDDI - Ethernet - FDDI.  That may sound like a strange case,
but it applies when you have small clumps of high end workstations on FDDI,
each connected to an existing Ethernet building backbone.  If you talk
from one clump to the other, the transport layer (TCP) would select FDDI-sized
packets.

	paul