User's Manual

Key Concepts 405
The History group allows you to monitor activity on your network at any
chosen time in the past.
Host
The Host group defines a standard by which a network device can make
available information on the activity of each separate "host" seen by the
network device on each of its interfaces and VLANs. A host is simply
another network device with a unique network address.
Information gathered against each host includes:
■ transmitted and received packets
■ transmitted and received bytes
■ errors
■ received multicast packets
The information in the Host group allows you to monitor the current
activity of each individual device on your network. It augments the
Statistics view, allowing you to drill down to identify which particular host
is responsible for a more generalized problem.
HostTopN
The HostTopN group presents the same data as the Host group, but
allows you to retrieve only the most active hosts in the group, sorted by a
specific data value of your choosing.
The most active hosts may be sorted by:
■ Packet Received Rate
■ Packet Sent Rate
■ Bytes Received Rate
■ Bytes Sent Rate
■ Error Packet Rate
■ Broadcast Packet Rate
■ Multicast Packet Rate
The HostTopN group complements the Host group, and allows you to
view which hosts on your network are responsible for the highest levels
of particular kinds of traffic.