ZyXEL Communications IES-612-51A User Manual

IES-612-51A User’s Guide

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

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.

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

DHCP Snoop Status

Click DHCP Snoop Status to open the screen where you can look at or clear 
the current DHCP snooping table on each port (see 

).

DHCP Counter

Click DHCP Counter to open the screen where you can look at a summary of 
the DHCP packets on each port (see 

Port

This field displays each DSL port number.

Active

This field displays whether DHCP snooping is active (“V”) or inactive (“-”) on this 
port.