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Management Guide
4-5
The purpose of IP multicast filtering is to optimize a switched network’s
performance, so multicast packets will only be forwarded to those ports containing
multicast group hosts or multicast routers/switches instead of flooding to all ports
in the subnet (VLAN).
The CheetahSwitch Workgroup-4508, with IP multicast filtering capability, not only
passively monitors IGMP Query and Report messages; it can also actively send
IGMP Query messages to learn locations of multicast routers/switches and
member hosts in multicast groups within each VLAN.
However, note that IGMP neither alters nor routes any IP multicast packets. Since
IGMP is not concerned with the delivery of IP multicast packets across
subnetworks, an external IP multicast router is needed if IP multicast packets have
to be routed across different subnetworks.
SNMP Management Software
SNMP (Simple Network Management Protocol) is a communication protocol
designed specifically for managing devices or other elements on a network.
Network equipment commonly managed with SNMP includes hubs, switches,
bridges, routers and host computers. SNMP is typically used to configure these
devices for proper operation in a network environment, as well as monitor them to
evaluate performance and detect potential problems.
Accton provides AccView/Open network management software for free with all of
its manageable products. AccView/Open contains a complete management
platform, including network discovery, mapping, event manager, log manager, MIB
browser, RMON analysis tools, and device management modules. Accton can also
provide optional plug-in device management modules for HP OpenView software.
Remote Monitoring
Remote Monitoring (RMON) provides a cost-effective way to monitor large
networks by placing embedded or external probes on distributed network
equipment (hubs, switches or routers). Accton’s AccView network management
software can access the probes embedded in recent Accton network products to
perform traffic analysis, troubleshoot network problems, evaluate historical trends,
or implement pro-active management policies. RMON has already become a
valuable tool for network managers faced with a quickly changing network
landscape that contains dozens or hundreds of separate segments. RMON is the
only way to retain control of the network and analyze applications running at multi-
megabit speeds. It provides the tools you need to implement either reactive or pro-
active policies that can keep your network running based on real-time access to
key statistical information.
This switch provides support for mini-RMON which contains the four key groups
required for basic remote monitoring. These groups include: