IES-1248-51/51A/53 User’s Guide
Chapter 29 DHCP Snoop 203
CHAPTER 29
DHCP Snoop
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 DESCRIPTION
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 Section 29.3 on page 204).
DHCP Counter Click DHCP Counter to open the screen where you can look at a summary of
the DHCP packets on each port (see Section 29.4 on page 205).
Port This field displays each ADSL port number.
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