User guide

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2
Configuring the Hub
Writer:
Chris Seiter
Project:
Configuring the Hub
Comments:
File Name:
1017A_4.DOC
Last Saved On:
6/26/97 3:08 PM
Connecting Multiple Hubs
The following sections describe how to connect multiple hubs using the
1017A/B hub’s RJ-45 uplink port, crossover twisted-pair cable, and a backbone
connection.
Using the RJ-45 Uplink Port
The 1017A/B hub provides an uplink port you can use to connect to another
hub. You can convert Port 16 to an uplink port by sliding the uplink switch to
the right (MDI) position. When the switch is in this position, you cannot use
Port 16 as a station port. Figure 4-2 shows an example configuration.
If you cascade hubs, IEEE 802.3 standards suggest limiting the maximum chain
length to four hubs. However, physical restrictions depend on actual repeater
delay. Therefore, if all your hubs are from Compaq, you can cascade up to five
hubs for a maximum LAN size of 75 nodes (using ports 1~15 on each available
hub). However, you can configure a larger network if you use a star or
hierarchical star configuration as described under “Guidelines for Multiple Hub
Configuration.”
Figure 4-2.
Multiple Hub Configuration Using Uplink Port