ZyXEL Communications IES4005M, User Manual

Page: 127 / 236

IES4005M User’s Guide
127
C
H A P T E R
1 5
DHCP
Use these commands to configure DHCP settings including enabling or disabling transparent DHCP
on specific VLANs; configure DHCP L2 Agent settings including options 18, 37, and 82 for specific
VLANs, configuring DHCP snooping database overflow handling; enabling, disabling, and displaying
DHCP snooping IP-MAC binding for specific DSL ports.
DHCP Relay Agent Information Option
The system can add information to DHCP requests that it relays to a DHCP server. This helps
provide authentication about the source of the requests. You can also specify additional information
for the system to add to the DHCP requests that it relays to the DHCP server. Please refer to RFC
3046 for more details. The DHCP relay agent information feature adds an Agent Information field to
the option 18, 37, or 82 field of the DHCP headers of client TCP/IP configuration request frames
that the IES relays to a DHCP server.