ZyXEL Communications 4528F User Manual

 Chapter 26 IP Source Guard

XGS-4526/4528F/4728F User’s Guide

open this screen, click Advanced Application > IP Source Guard > DHCP 
Snooping > Configure > VLAN.

Figure 122   DHCP Snooping VLAN Configure

The following table describes the labels in this screen.

Table 82   DHCP Snooping VLAN Configure

Show VLAN

Use this section to specify the VLANs you want to manage in the 
section below.

Start VID

Enter the lowest VLAN ID you want to manage in the section below.

End VID

Enter the highest VLAN ID you want to manage in the section below.

Apply

Click this to display the specified range of VLANs in the section below.

VID

This field displays the VLAN ID of each VLAN in the range specified 
above. If you configure the * VLAN, the settings are applied to all 
VLANs.

Enabled

Select Yes to enable DHCP snooping on the VLAN. You still have to 
enable DHCP snooping on the Switch and specify trusted ports.

Note: The Switch will drop all DHCP requests if you enable DHCP 

snooping and there are no trusted ports.

Option82

Select this to have the Switch add the slot number, port number and 
VLAN ID to DHCP requests that it broadcasts to the DHCP VLAN, if 
specified, or VLAN. You can specify the DHCP VLAN in the DHCP 
Snooping Configure screen. See 

Information

Select this to have the Switch add the system name to DHCP requests 
that it broadcasts to the DHCP VLAN, if specified, or VLAN. You can 
configure the system name in the General Setup screen. See 

. You can specify the DHCP VLAN in the DHCP 

Snooping Configure screen. See 

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 this to reset the values in this screen to their last-saved values.