Chapter 29 Dhcp Snoop; Dhcp Snoop Overview; Dhcp Snoop Screen; Figure 104 Dhcp Snoop - ZyXEL Communications IES-1248-51 User Manual

This chapter shows you how to set up DHCP snooping settings on the subscriber ports.

29.1 DHCP Snoop Overview

DHCP snooping prevents clients from assigning their own IP addresses. The IES-1248 can
store every (ADSL 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.

29.2 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 104 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

Chapter 29 DHCP Snoop

C
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 ADSL port number.
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DHCP Snoop
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Section 29.4 on page
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