Introduction To Ip Accounting; Configuring Ip Accounting; Configuration Prerequisites; Configuration Procedure - 3Com MSR 50 Series Configuration Manual

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Introduction to IP
Accounting
Configuring IP
Accounting
Configuration
Prerequisites

Configuration Procedure

IP A
CCOUNTING
When configuring IP accounting, go to these sections for information you are
interested in:
"Introduction to IP Accounting" on page 619
■
"Configuring IP Accounting" on page 619
■
"IP Accounting Configuration Example" on page 620
■
"Displaying and Maintaining IP Accounting Configuration" on page 622
■
The IP accounting feature implements the statistics of incoming and outgoing IP
packets on the router. These IP packets include those sent and forwarded by the
router normally as well as those denied by the firewall.
The statistics of the IP accounting includes information such as source and
destination IP addresses, protocol number, packet sum, and byte sum. The
statistics results of IP packets passing the firewall and those matching the IP
accounting rule are respectively stored and displayed.
Each IP accounting rule consists of an IP address and its mask, namely, a subnet
address, which is the result of ANDing the IP address with its mask. IP packets are
sorted as follows:
If a firewall is configured on an interface and incoming and outgoing IP packets
■
are denied by the firewall, these IP packets are counted in the firewall-denied
table.
If the source or destination IP address of the IP packets passing the interface or
■
the firewall, if configured, matches a network address in the IP accounting rule,
the packets are counted in the interior table. Otherwise, the packets are
counted in the exterior table.
If the statistics information of an entry in an accounting table is not updated
■
within its aging time, the router considers that the entry time out and deletes
them.
Assign an IP address and mask to the interface on which the IP accounting feature
needs to be enabled. If necessary, configure a firewall on the interface.
Follow these steps to configure IP accounting:
C
ONFIGURATION