Ohhh, those glory telecom boom days...
Star: central controller/server/uplink card has point-to-point links to
each of the line card, but line cards can not talk to each other
directly. Low number of links, but the server has to handle each packet
in the system.
Ring: each card is only connected to its two immediate neighbors. A
packet from card 1 to card 4 travels through cards 2 and 3 in a
"bucket-brigade" fashion. Low number of links (and they are the shortest
of all topologies), best scalability of all three topologies, but
"bucket-brigade" adds transmission delays.
Mesh: every card in the system can talk to every card via a dedicated
point-to-point link. Most versatile, no unnecessary load on the
server/controller card, but a gazillion of point-to-point links, very
complex and expensive backplane (thus, it does not scale well).
Sergey Ermolin
Dust Inc.
2560 9th Street, #218.
Berkeley, CA 94710
(510) 225-2137
(510) 540-9671 - fax
-----Original Message-----
From: Dennis Fritz [mailto:[log in to unmask]]
Sent: Wednesday, December 17, 2003 9:43 AM
To: [log in to unmask]
Subject: [TN] Star, Ring, and Mesh Backplanes
Does anyone have a simple explanation, or website link, that will cover
the difference between these architectures? The names keep popping up
in high speed backpanel discussions, and I need to be a bit more
knowledgeable. Thanks
Denny Fritz
MacDermid
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