Management
4–11
Typical Management Techniques
You can manage a DECrepeater 90C as a standalone unit or within a
group of repeaters in a DEChub 90 backplane. For a standalone unit, you
refer to the DECrepeater 90C LEDs for system status. In a DEChub 90
environment, you can refer to the LEDs and perform online management
by using a DECbridge 90 work group bridge.
Whether you use a standalone or DEChub 90 configuration, Digital
recommends that you create a network topology map. This map makes it
easier to perform management tasks. Figures 4–2 and 4–3 show typical
topology maps.
Remote Network Management With the DECbridge 90
You can manage a DECrepeater 90C remotely, through a DECbridge
90 work group bridge and a DEChub 90 backplane. The DECbridge 90
communicates across the DEChub 90 backplane to any DECrepeater in
the DEChub 90. You can connect two DEChub 90 backplanes together
and manage the repeaters in both DEChub 90s with one DECbridge 90.
The DECbridge 90 communicates with the DECrepeater 90C by using
private signals on the DEChub backplane. The two DEChub 90 units are
connected by two cables:
•
ThinWire coaxial cable, to carry the work group Ethernet signals
•
DECconnect office cable, to carry the management signals
NOTE
If two DEChub backplanes are being managed by one bridge, the
backplanes must be connected with ThinWire cable (BNC to BNC)
(PN BC16M–xx) and a DECconnect office cable (PN BC16E–xx ).
Management Disconnect
A port can be partitioned at any time by the management protocol. The
management protocol can only be used for the repeater ports mounted
in the DEChub 90 backplane and connected to a DECbridge 90. When a
port is disconnected by the management protocol, it can be reconnected by
either turning the power off and on again, or by using the management
protocol. If a port is partitioned by the management protocol, the port
LED flashes approximately twice a second.
