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3-4 C
HAPTER
3: I
NSTALLING
M
ODULES
I
NTO
T
HE
MSH C
HASSIS
DUA1800-0AAA04
■
Resilient links can be set up. See Figure 3-2 below. A resilient link
consists of a
main port
and a
stand-by port
which are both set up
locally via the display panel or remotely via a Network Manager.
The main port is the normally operational port; however, if a fault
occurs on the link and data cannot be passed over it, the stand-by
port will automatically take over. .
Figure 3-2 Resilient links
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Security features can be configured locally from the display panel
and monitored remotely by a network management tool such as
ISOVIEW Network Manager.
Limited management can be carried out locally at the MSH, by
means of the display or via the RS232 port. Implementation of the
full set of management functions available from the Management
Module require the use of a Network Manager. In both cases the
Management Module must be fitted to the MSH.
LED Display.
The LEDs provide visual information on the data
integrity and port status of each segment attached to a module.
The function of module LEDs is described in the user guide that
accompanies each module.
Repeater Functions.
Depending on type, MSH modules provide
the following features:
■
Auto Partition/Reconnection:
The module provides protection
from faults such as cable breaks and faulty connectors which
would halt all network communication. In these circumstances,
the segment in which the fault occurs is isolated by partitioning it
from the rest of the network after 32 collisions.
inter-repeater link
LinkBuilder MSH No. 1
standby link
port enabled
port enabled
stand-by port disabled
main port enabled
LinkBuilder MSH No. 2
Chassis.bk : CHAPTER3 Page 4 Monday, February 10, 1997 1:11 PM