ZyXEL Communications IES-612-51A User Manual

 Chapter 44 DHCP Commands

IES-612-51A User’s Guide

where

This command adds the specified information for the relay agent.

Use these commands to configure or show DHCP snooping settings on the subscriber ports. 
The system gets the client MAC-IP address information (in the reply from a DHCP server) and 
stores it in the DHCP snooping table. The system only forwards packets from the clients 
whose MAC-IP address is in the DHCP snooping table. Packets from unknown IP address(es) 
are not forwarded (dropped). This feature prevents clients from assigning their own static IP 
addresses. 

Syntax:

  ras> switch dhcpsnoop enable <portlist>

where

This command activates the DHCP snooping feature on the specified port(s). The following 
example enables DHCP snooping on port 1.

Figure 146   DHCP Snoop Enable Command Example

Syntax:

  ras> switch dhcpsnoop disable <portlist>

where

[<relay info>]

=

Up to 23 ASCII characters of additional information for the 
IES-612-51A to add to the DHCP requests that it relays to a 
DHCP server.

Examples of information you could add would be the name 
of the IES-612-51A or the ISP.

<portlist>

=

You can specify a single port <1>, all ports <*> or a list of 
ports <1,3,enet1>. You can also include a range of ports 
<1,5,6~10,enet1,enet2>.

ras> switch dhcpsnoop enable 1

<portlist>

=

You can specify a single port <1>, all ports <*> or a list of 
ports <1,3,enet1>. You can also include a range of ports 
<1,5,6~10,enet1,enet2>.