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Power Tools 1993 October - Disc 2
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Power Tools (Disc 2)(October 1993)(HP).iso
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1993-02-19
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HP OpenView Network Node Manager vs. SunNet Manager
May 1, 1992
HP OpenView Network Node Manager provides for the centralized
management of networks, systems, applications, and test and
measurement instrumentation. This article will help you
effectively compete against Sun Microsystems.
HP's OpenView Network Node Manager and Sun's SunNet Manager
are both software products for managing TCP/IP networks and
use the Simple Network Management Protocol (SNMP). While
these products may at first appear to have similar
functionality, a closer comparison illuminates many
significant differences. There are two major areas of
departure between HP OpenView Network Node Manager and Sun's
SunNet Manager. Both areas significantly affect user
efficiency and effectiveness.
1) The first important difference is that OpenView Node
Manager is designed to enhance the productivity of
administrators in the management of Interconnected
Multivendor LANs and Systems. SunNet Manager was designed as
a management station for only Workgroups of Sun Workstations
(just look at the name). SunNet Manager does not scale well
into groups of interconnected LANs. Because of this, SunNet
Manager requires a network administrator to perform much more
work on a daily basis to get his or her job done. Here are
the salient reasons why:
a) DISCOVERY - Sun's LAN discovery feature is very weak
compared to OpenView Network Node Manager's. Network
Node Manager automatically discovers all of the nodes on
the entire network of interconnected LANs to which it is
attached, and monitors and automatically updates all
changes made to the network. It uses a patent-pending
process which minimizes network intrusion. Network Node
Manager discovers at about an Order of Magnitude Faster
than SunNet Manager.
SunNet Manager offers two different discovery methods to
its user, and expects the user to configure it for one
or the other. The first, "Watch Mode", listens on the
attached Local Segment for IP packets to identify
network nodes. Any nodes on other segments which do not
generate packets to the local segment or whose packets
are filtered from the local segment cannot be
identified. Additionally, "Watch Mode" is CPU intensive
and cannot be used continuously while running other
processes. The second method of Sun's discovery feature
requires multiple processes to discover nodes on more
than one subnet, and must be Manually configured to
discover each individual segment and then looks at Every
IP address on each segment to identify nodes. This is a
very intrusive and time-consuming process. The process
is Static, that is, it does not automatically discover
new or changed segments or nodes on the network after it
has run, as does Network Node Manager. Both of these
discovery methods require the administrator to know all
the details of his or her network and spend his or her
time administering the network changes to the SunNet
Manager station. Network Node Manager does it
automatically for them. SunNet Manager makes them waste
their time doing it manually.
b) NETWORK MAP - OpenView Network Node Manager's
network map is fully automatic whereas SunNet Manager's
is not. Network Node Manager identifies all network
connectivity, i.e., between the subnets, segments,
gateways, and nodes, and automatically and correctly
displays that connectivity as a network map. It checks
for illegal network conditions such as duplicate IP
addresses, illegal addresses, and incorrect subnet
masks, and alerts the administrator to these conditions
if they exist. Network Node Manager continually
monitors the network and automatically updates the
network map display as changes in status and topology
occur. This saves the network administrator a great
deal of work on an ongoing basis.
SunNet Manager only displays its discovered nodes
alphabetically by name and categorized only by subnet.
It does not automatically display any connectivity
between those nodes or subnets and gateways. The
administrator is left to figure out and draw-in all the
connectivity him- or herself, and SunNet Manager allows
the editing to be done incorrectly, that is,
connectivity can be shown between two nodes which are
not really connected. All non-Sun devices are displayed
as generic devices. Any changes to the network
topology, e.g., new nodes or segment changes, must be
known by the administrator and drawn-in by him or her
which, again, leaves open the possibility of mapping the
network incorrectly. Network Node Manager increases the
productivity of the network administrator by doing all
of this for him or her and automatically updates it with
all changes, freeing him or her to focus on their real
job of providing services. This is not even mentioning
the importance of having up-to-date, accurate
information with which to manage their networks and
systems.
c) ARCHITECTURE - According to industry analysts, HP
OpenView is an open architecture and SunNet Manager is
proprietary. The Open Software Foundation (OSF)
selected HP OpenView technologies to form key components
of the Distributed Management Environment (DME), a
standards-based framework and unified approach to
network, system, and application management.
Because of its architecture, HP OpenView Network Node
Manager uses SNMP in a native fashion. Because of this,
it easily incorporates any vendor-specific MIB. SunNet
Manager is inferior for managing multivendor SNMP
devices because of its Proxy Architecture that uses RPC
for all network communications (a design for Sun
workgroup management). SNMP communications become
two-step processes for SunNet Manager, and the proxies
must be created and then themselves managed. SunNet
Manager can quickly become performance bound in networks
of interconnected LANs because of this architecture.
OpenView NETWORK NODE MANAGER is based on industry
standards like SNMP and therefore does not need
additional processes or proxy-agent support to manage
multivendor network devices.
d) EASE OF USE - OpenView Network Node Manager is
designed for ease of use. Network Node Manager is
typically deployed in less than an hour, has an open,
on-line help facility and makes intuitive use of color
to display network status. SunNet Manager requires
excessive configuration using cryptic syntax, it
typically takes days to deploy, it has no on-line
documentation, and the user is responsible for setting
up interface conventions. Changes to the network
require configuration changes to the SunNet Manager
software. Network Node Manager is designed to manage
change for the user, not vice-versa as with SunNet
Manager.
2) The second major area of differentiation is HP's
world-wide support and overwhelming commitment to the
business of standards- based network and system management.
HP OpenView is a broad, multi-vendor platform offering, part
of which was selected by OSF as the management framework of
the Distributed Management Environment. OpenView Network
Node Manager is available on HP- UX, Sun OS, and has been
licensed by IBM for the RS 6000. SunNet Manager is only
available on Sun OS. In gross comparison, OpenView Network
Node manager was designed to increase the productivity of
Network and Systems administrators for interconnected
multivendor LANs -- SunNet Manager was designed as an element
manager for workgroup networks of Sun workstations.
When positioning Network Node Manager vs. SunNet Manager,
point out the important architectural difference between the
products, and also the size of networks they were designed to
manage. Network Node Manager was designed to manage entire
sites or campuses of up to 2,000 nodes; SunNet Manager can
only manage as many nodes as you can keep track of manually
(because of the lack of dynamic discovery and automapping),
or additional proxy-agents processes that your management
environment can support.
HP OpenView also has an announced, analyst-acclaimed vision
and plan for future product direction, consistent with
industry standards and market demands such as OSF's DME,
SNMP, and OSI. SunNet Manager's architecture limits the
options for any product vision to meet future needs, which
may account for the lack of any announced vision.