Specifications

RADring
Installation & Operation Manual Functional Description
3/11/98 12:33 Management Modules Functional Description 2-41
2.10 Management Modules Functional Description
The RADring hub and all resident modules are managed from the RADview
Management Station via the CML/NM card which acts as the RADring hub
module agent, and the CML/IB in-band management agent, which provides
in-band management of the network.
The RADview Management Software Application runs on an Pentium PC (or
compatible), under Microsoft Windows. It provides powerful, user friendly
monitoring and control of RADring hubs and the Token Ring network. The
RADview allows full monitoring and control with continuously-updated
representation of the network and attached devices. All network events and
alarms are immediately reported to the RADview Station and are
represented graphically.
Bad lobes and failed main ring segments are automatically reported and the
appropriate ports bypassed or looped back to ensure continuous ring
operation.
A network administrator can use the network management station to
remotely alter portions of the ring's physical configuration by altering the
graphical element on the network management display. This enables him to
rapidly trace and isolate faults without leaving the console. Where cabling is
widely distributed, such as large multistory networks, this capability is
particularly useful. The RADview management station can also monitor,
control and troubleshoot off-site or remote networks.
RADview provides both in-band and out-of-band communication paths for
controlling and monitoring the network such that the network can still be
controlled even under worst case conditions of a network failure (hard error
condition).
CML/NM RADring
Hub
Management
Module
The CML/NM card acts as an agent between the RADview management
station and the individual modules. It provides an RS-232 out-of-band
connection for communication with the management station using a
modified version of DDCMP asynchronous protocol. The management
communication can operate at 2.4 to 115.2 Kbps. The CML/NM also
provides management of the hub in the case when communication with
the management station is in-band via the CML/IB in-band agent.
The CML/NM card can be directly connected to one of the serial ports of the
RADview station, or through a modem link, a multipoint modem link or
sharing device.
The CML/NM has its own data base, kept in a non-volatile memory. The
data base stores the RADring hub configuration which it collects by
communicating with the individual modules, and the status of each module
which is automatically updated to reflect the latest changes. The data base
also stores the events reported by the modules. Event collection continues
even when communication with the management station is not in operation.
The CML/NM is not necessary for continued RADring operation, such that it
does not constitute a single point of network failure.