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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

132.0. "FDDI Multicast Equiv?" by SYOMV::DEEP (No need to get violent...) Tue Sep 04 1990 16:08

Here's an FDDI scenario that has me a little baffled... Can anyone help me
sort this out?

  Lets say I have an ethernet station connected to an ethernet segment, 
communicating with another ethernet station(s) on the same segment, using a 
multicast packet.

  If I add an FDDI ring between stations (creating two ethernet segments)
I'm assuming that my multicast packet still works?

  Now, what if one of my stations is on the FDDI ring itself?  What happens 
to the multicast packet?   

  Thanks for any info...

                Bob Deep
                DTN 256-5708

T.R Title User Personal
Name Date Lines

132.1 KONING::KONING NI1D @FN42eq Tue Sep 04 1990 16:30 10

T.R	Title	User	Personal Name	Date	Lines
132.1		KONING::KONING	NI1D @FN42eq	`Tue Sep 04 1990 16:30`	10
	Why is there anything puzzling about this? The bridge turns the Ethernet multicast packet into an FDDI multicast packet. The other bridge turns it back into an Ethernet multicast packet. If any nodes anywhere (on the Ethernet or on the FDDI) are listening for that multicast address, they will receive the packet. Nothing strange about it. At this level, the FDDI work just like any other LAN. paul

Why is there anything puzzling about this?  The bridge turns the Ethernet
multicast packet into an FDDI multicast packet.  The other bridge turns it
back into an Ethernet multicast packet.  If any nodes anywhere (on the
Ethernet or on the FDDI) are listening for that multicast address, they will
receive the packet.

Nothing strange about it.  At this level, the FDDI work just like any other
LAN.

	paul