3Com corebuilder 3500 Implementation Manual page 553

Table 67 RMON-2 Groups Supported in the System (continued)
Group
RMON-2 Group Number
nlMatrix 15
alHost 16
alMatrix 17
probeConfig. 19
probeCapabilities
Protocol Directory Group
The protocolDir group provides information about the protocols that a
particular RMON probe has or can interpret. It provides a common
method of storing information about the protocols and makes it easier
for a manager to monitor traffic above the MAC layer. It includes the
base-level protocols such as IP, IPX, and AppleTalk, as well as higher-level
protocols such as UDP, TCP, UDP-SNMP, and so forth.
This group features a protocol directory table that has an entry for each
protocol. This enables the probe to decode and count protocol data units
(PDUs). Information in the table includes the following:
A protocol identifier (a unique octet string for a specific protocol)
Protocol parameters (information about the probe's capabilities for a
specific protocol)
Remote Monitoring (RMON)
Purpose
A network-layer matrix that provides
statistics on the amount of traffic between
source/destination pairs of hosts based on
network-layer address. It also maintains a
TopN table to rank pairs of hosts based on
the number of octets or number of packets
sent between pairs of hosts.
Traffic statistics to and from each host by
application layer. Same as nlHost except that
traffic broken down by protocols can be
recognized by ProtocolDir
Traffic statistics on conversations between
pairs of hosts, segmented by application
layer protocol.
Defines standard parameters that control the
configuration of RMON probe functionality.
The system currently supports only the
probeCapabilities object from this group.
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