Dhcp Snoop; Chapter 26 Dhcp Snoop; Dhcp Snoop Overview; Dhcp Snoop Screen - ZyXEL Communications IES-612-51A User Manual

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H A P T E R
This chapter shows you how to set up DHCP snooping settings on the subscriber ports.

26.1 DHCP Snoop Overview

DHCP snooping prevents clients from assigning their own IP addresses. The IES-612-51A can
store every (DSL port, MAC address, IP address) tuple offered by the DHCP server. Then, it
only forwards packets from clients whose MAC address and IP address are recorded. Packets
from unknown IP addresses are dropped.

26.2 DHCP Snoop Screen

Use this screen to activate or deactivate DHCP snooping on each port. To open this screen,
click Advanced Application, DHCP Snoop.

Figure 93 DHCP Snoop

The following table describes the labels in this screen.

Table 56 DHCP Snoop

LABEL
DHCP Snoop Status Click DHCP Snoop Status to open the screen where you can look at or clear
DHCP Counter
Port
Active
IES-612-51A User's Guide
DESCRIPTION
the current DHCP snooping table on each port (see
Click DHCP Counter to open the screen where you can look at a summary of
the DHCP packets on each port (see
This field displays each DSL port number.
This field displays whether DHCP snooping is active ("V") or inactive ("-") on this
port.
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DHCP Snoop

Section 26.3 on page
Section 26.4 on page 193).
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