Instruction manual

Hub Components
893-839-C 1-15
Figure 1-9. Segment Select switch (default) and configuration modes
An NMM installed in a 100-series hub can be assigned through software to a
segment independent of the host hub. By default, an NMM is assigned to the
host hub segment. For more information about segment configuration
considerations, see “Choosing Segment Assignments” on page 7.
10 Management Extension Ports
Two RJ-45 management extension ports (see Figure 1-10) provide optional
serial-management connectivity to remote cascades and hubs within a stack. A
single NMM can provide standard management to hubs as far as 100 meters
away (cumulative total distance). Total stack size should not exceed 10 hubs.
Figure 1-10. Cascades connected through management extension ports
The management extension ports require standard four-pair unshielded twisted
pair (UTP) cable (Category 3 or better) terminated with RJ-45 connectors. This
cable uses only the fourth pair of the cable, pins 7 and 8.
NOTE: Do not use management extension cable between hubs in the same
cascade.
NOTE: You can also use network management software
to change a segment assignment. If you use this method,
the switch setting may not match the actual segment
setting. The actual segment setting is always correctly
shown by the segment LEDs.
Segment Select
Isol 1 2 3
5880
5881.2
100 meters
40 meters 60 meters
893-839-CBook Page 15 Thursday, December 12, 1996 4:18 PM