Nortel Networks manual Segment Switch Application, BayStack 450 Switch Used as a Segment Switch

Using the BayStack 450 10/100/1000 Series Switch

Segment Switch Application

Figure 1-7 shows a BayStack 450-24T switch used as a segment switch to alleviate user contention for bandwidth and eliminate server and network bottlenecks. Before segmentation, 88 users had a total bandwidth of only 10 Mb/s available. After segmentation, 92 users have 40 Mb/s, four times the previous bandwidth, while adding 22 dedicated 100 Mb/s connections. This configuration can be extended to add more segments without degrading performance.

	Before	After
		Server
	10BASE-T hubs	BayStack 450-24T
		switch
		Up to 22
Server		users
		Up to 23
		users
		Up to 23
		users
		Up to 23
To	Up to	users
		To
Network
	88 users	Network
Center
		Center
Key		Up to 23
		users
10 Mb/s
100 Mb/s
200 Mb/s		- Four sets of 23 users; each set shares 10 Mb/s
		(10/23 Mb/s per user)
- 88 users share 10 Mb/s (10/88 Mb/s per user)		- Addition of 22 users; each with dedicated
- Server bottleneck (10 Mb/s bandwidth)		100 Mb/s bandwidth
- Network center bottleneck (10 Mb/s bandwidth)		- Server with dedicated 100 Mb/s bandwidth
-Total of 88 users		- Network center with dedicated 100 Mb/s full-duplex bandwidth
		(200 Mb/s bidirectional)
		- Total of 114 users
		BS45006A

Figure 1-7. BayStack 450 Switch Used as a Segment Switch

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