3Com 10014299 manual Configuring IP Count

23 CONFIGURING IP COUNT

This chapter contains information on the following topics:

■IP Count Introduction

■IP Count Configuration

■Display and Debug IP Count

■Typical Configuration Example

■Troubleshooting

IP Count Introduction IP Count makes the statistics about the input and output packets, and the packets denied by the firewall as well. When making the statistics, the router classifies the bidirectional (in and out) IP packets by testing whether they match any IP Count lists and whether they are denied by the firewall. At the same time of making data statistics, the total numbers of packets and bytes are recorded.

As shown in the following figure, if IP Count has been enabled on the output interface Ethernet1, the statistics will be made on the flows transmitted from this interface to the network B. A flow destined for the B network can be identified by an IP triplet (source address, destination address and protocol). Through the statistics that has been made, you can know the outgoing traffic size. If a firewall for filtering outgoing packets has been configured on the interface, IP Count will record the addresses from which the packets are denied by the firewall, and make the statistics on the denied packets and bytes.

Likewise, if IP Count is enabled on the incoming interface Ethenet0, the statistics will be made on the flows from the A network to the router. If a firewall for filtering the incoming packets has been enabled on the interface, the IP Count module can make statistics on the packets denied by the firewall.