38CHAPTER 3: COLLECTING DATA

 

single segment. Traffix Manager uses RMON-2 functionality to build up a

 

picture of communicating devices on the network and the traffic flowing

 

between them, including network layer addresses and protocols seen.

 

For further information on RMON-1 and RMON-2, refer to the 3Com®

 

RMON-1 and RMON-2 Backgrounder on the 3Com Web Site:

 

http://www.3com.com/nsc/501305.html.

 

 

How Traffix

An agent which supports RMON-2 is able to watch the packets on the

Manager Discovers

network segment to which it is attached. Depending on the protocol in

Network Devices

use, most packets typically contain a source and destination address. The

Using RMON-2

RMON-2 agent decodes this address information and uses it to build

 

tables of data about the communicating devices and the traffic flowing

 

between them, including network layer addresses and protocols seen.

 

This information is then retrieved by Traffix Manager and is used to build

 

a graphical topology of your network (the Traffix Manager Map) and to

 

compile a list of active devices on your network.

 

As a result of the RMON-2 method of discovering devices, you may see

 

more than one object corresponding to the same physical device. For

 

example, separate entries for a device may be made under its ARP, IP and

 

IPX addresses. For the same reason, “non-device” objects, such as IP

 

broadcast and multicast addresses, will appear in the Map.

 

With no RMON-2 conversation data collected, Traffix Manager is able to

 

perform only limited functions.

 

If an agent selected for data collection supports RMON-1 only, Traffix

 

Manager is only able to collect line statistics data from that agent and

 

perform basic agent maintenance operations. See Appendix I, “Using

 

RMON-1 Agents” for more information.

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HP Transcend Traffix Manager manual How Traffix