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Overview of the Model 281xSA Hub
Management Functions in the Model 281xSA Hubs
SNMP-based Management
1-4
The Model 281xSA hubs are part of a family of Ethernet SA management
products that provide Advanced Analyzer functionality across the range of
connectivity product families. In these products, dedicated hardware for packet
capture and analysis frees the network interface to run SNMP communication
under conditions of extreme network load. This "probe in a hub" architecture
brings high-power RMON and RMON+ monitoring and analysis capability
into the workgroup environment.
Dedicated Data Collection
The Model 281xSA hub incorporates SynOptics-developed application-specific
integrated circuit (ASIC) technology for packet capture and analysis. Called the
LANIP chip, this chip works as a data collection engine and is designed to
offload the main network management CPU from maintaining CPU-intensive
network statistics. The LANIP chip monitors all incoming packets and records
selected statistics in realtime on a per-port basis. The programmable packet
slices are moved to a shared buffer that the agent can access for management.
The Model 281xSA hub implements SNMP, the standard communications
protocol that simplifies the management of network devices linked together
in a multivendor networking environment. SNMP agents reside in network
devices and respond to queries sent by network management software running
on a management station. The management station collates the results of these
queries and presents them graphically on the management station display.
In the Model 281xSA hub, the network management board gathers con-
figuration and control data across the cascade network management interface
(CNMI) bus and uses the LANIP chip to gather network-level performance and
control data. Then the network management board forwards the data to a
network management station, where network managers can use the data for
network planning and for diagnostic operations.
Refer to your network management system documentation for more
information on this level of network management capability.
893-743-A
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