ZyXEL IES-612-51A User Manual download pdf (Page 295)

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Chapter 44 DHCP Commands

IES-612-51A User’s Guide

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where

This command adds the specified information for the relay agent.

44.4 DHCP Snoop Commands

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.

44.4.1 DHCP Snoop Enable Command

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

44.4.2 DHCP Snoop Disable Command

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>.

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