3Com 4007, Implementation Manual, Page: 642 / 684

642 C
HAPTER
23: D
EVICE
M
ONITORING
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.
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)
Protocol Distribution Group
The Switch 4007 provides protocolDist segmentation only between the IP,
IPX, and Appletalk protocols.
The protocolDist group tracks how many octets and packets the
supported protocols have sent. It features two tables, a protocol
distribution control table that manages the collection of the statistics for
the supported protocols, and a protocol distribution statistics table that
records the statistics. In the control table, each row represents a network
interface associated with the probe and controls rows in the statistics
table (a row for each protocol associated with the interface).
The protocol distribution statistics table includes the following statistics:
■
The number of packets received for each protocol
■
The number of octets transmitted to this address since it was added to
the network-layer host table.
alMatrix 17 Traffic statistics on conversations between
pairs of hosts, segmented by application
layer protocol.
probeConfig.
probeCapabilities 19 Defines standard parameters that control the
configuration of RMON probe functionality.
The system currently supports only the
probeCapabilities object from this group.
Table 100 RMON-2 Groups Supported in the System (continued)
RMON-2 Group
Group
Number
Purpose