Zyxel VES-1624FT-55A [177/312] Dhcp snoop overview

Zyxel VES-1624FT-55A [177/312] Dhcp snoop overview
VES-1624FT-55A User’s Guide
177
CHAPTER 30
DHCP Snoop
This chapter shows you how to set up DHCP snooping settings on the subscriber ports.
30.1 DHCP Snoop Overview
DHCP snooping prevents clients from assigning their own IP addresses. The IP DSLAM 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 IP DSLAM forwards these
packets as well.
30.2 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 94 DHCP Snoop

Содержание

Скачать