ZyXEL ES-3148 Guida Utente

 Chapter 28 DHCP

ES-3148 User’s Guide

The following describes the DHCP relay information that the Switch sends to the DHCP 
server:

Configure global DHCP relay in the DHCP Relay screen. Click IP Application > DHCP in 
the navigation panel and click the Global link to display the screen as shown. 

Figure 126   IP Application > DHCP > Global 

The following table describes the labels in this screen. 

Table 90   Relay Agent Information

Slot ID

(1 byte) This value is always 0 for stand-alone switches.

Port ID

(1 byte) This is the port that the DHCP client is connected to.

VLAN ID

(2 bytes) This is the VLAN that the port belongs to.

Information

(up to 64 bytes) This optional, read-only field is set according 

to system name set in Basic Settings > General Setup.

Table 91   IP Application > DHCP > Global

Active

Select this check box to enable DHCP relay.

Remote 

DHCP Server 

1 .. 3

Enter the IP address of a DHCP server in dotted decimal notation.   

Relay Agent 

Information

Select the Option 82 check box to have the Switch add information (slot number, port 

number and VLAN ID) to client DHCP requests that it relays to a DHCP server. 

Information

This read-only field displays the system name you configure in the General Setup 

screen. 
Select the check box for the Switch to add the system name to the client DHCP 

requests that it relays to a DHCP server.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch loses 

these changes if it is turned off or loses power, so use the Save link on the top 

navigation panel to save your changes to the non-volatile memory when you are done 

configuring.

Cancel

Click Cancel to begin configuring this screen afresh.