
IES-1248-51V User’s Guide
223
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-
1248-51V 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.
In some cases, you might want to allow packets from an IP address not offered by
the DHCP server. This might apply, for example, when a device uses a static IP
address. In this case, you can specify the IP address whose packets are allowed,
and the IES-1248-51V forwards these packets as well.
Comentarios a estos manuales