ATM Asynchronous Transfer Mode

6. A LAN Example

Fast Ethernet versus ATM-Hub

100 Mbps B_Line 25 Mbps

100 Mbps B_aggr 4.2 Gbps

B_aggr/N B_Node * min[B_Line,B_aggr/N]

=1 Mbps for N=100 =25 Mbps

rapid BW depletion none until B_aggr

coarse granularity fine

no QoS yes

data,voice (?) data types data,voice,video

$300-400/node cost $400-500/node


100 Mbps	B_Line	25 Mbps
100 Mbps	B_aggr	4.2 Gbps
B_aggr/N	B_Node *	min[B_Line,B_aggr/N]
=1 Mbps	for N=100	=25 Mbps
rapid	BW depletion	none until B_aggr
coarse	granularity	fine
no	QoS	yes
data,voice (?)	data types	data,voice,video
$300-400/node	cost	$400-500/node

* all nodes are continuously active, protocol overhead ignored

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Last revised: 24 October 1997, BJK