User guide

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4-2
Configurations
Writer:
Chris Seiter
Project:
Configurations
Comments:
File Name:
1009B_4.DOC
Last Saved On:
5/19/97 3:27 PM
Connecting Multiple Hubs
The 1009B hub provides an uplink port that lets you connect the hub to another
1009B or compatible hub. The IEEE 802.3 standard recommends a limit of four
hubs in an uplink configuration. However, physical restrictions depend on
actual repeater delay. Therefore, if all your hubs are from Compaq, you can
have up to five hubs in the configuration for a maximum LAN size of 35 nodes
(that is, using Ports 1-7 on each available hub). You can configure a larger
network if you use a star or hierarchical star configuration as described in
“Guidelines for Multiple Hub Configuration.” Figure 4-2 shows an example
uplink configuration.
Figure 4-2
. Multiple Hub Configuration Using Uplink Port
NOTE
: When using the UPLINK port to connect to another hub, use straight-through
(normal) twisted-pair cable. This cable is the same cable used for connecting the
hub to a workstation. For more information, see Appendix B  Port and Cable Pin
Assignments.