Extreme Networks Summit1 - Manual (Page 191)

S UMMIT S WITCH I NSTALLATION AND U SER G UIDE 12-15
RMON
A typical RMON setup consists of the following two components:
• RMON probe — An intelligent, remotely controlled device or software agent that
continually collects statistics about a LAN segment or VLAN. The probe transfers
the information to a management workstation on request, or when a predefined
threshold is crossed.
• Management workstation — Communicates with the RMON probe and collects the
statistics from it. The workstation does not have to be on the same network as the
probe, and can manage the probe by in-band or out-of-band connections.
RMON F EATURES OF THE S WITCH
The IETF defines nine groups of Ethernet RMON statistics. The Summit supports the
following four of these groups:
• Statistics
• History
• Alarms
• Events
This section describes these groups, and discusses how they can be used.
S TATISTICS
The RMON Ethernet Statistics group provides traffic and error statistics showing
packets, bytes, broadcasts, multicasts, and errors on a LAN segment or VLAN.
Information from the Statistics group is used to detect changes in traffic and error
patterns in critical areas of the network.
H ISTORY
The History group provides historical views of network performance by taking periodic
samples of the counters supplied by the Statistics group. The group features
user-defined sample intervals and bucket counters for complete customization of trend
analysis.
The group is useful for analysis of traffic patterns and trends on a LAN segment or
VLAN, and to establish baseline information indicating normal operating parameters.
Summit.bk : 12STATUS.FM Page 15 Thursday, June 18, 1998 9:27 AM