Operation Manual

Chapter 26 IP Source Guard
GS1920 Series User’s Guide
236
Figure 169 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection >
Configure > VLAN
The following table describes the labels in this screen.
26.11 Technical Reference
This section provides technical background information on the topics discussed in this chapter.
26.11.1 DHCP Snooping Overview
Use DHCP snooping to filter unauthorized DHCP packets on the network and to build the binding table
dynamically. This can prevent clients from getting IP addresses from unauthorized DHCP servers.
Table 109 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection >
Configure > VLAN
LABEL DESCRIPTION
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 ARP inspection on the VLAN. Select No to disable ARP inspection on the
VLAN.
Log Specify when the Switch generates log messages for receiving ARP packets from the VLAN.
None: The Switch does not generate any log messages when it receives an ARP packet from
the VLAN.
Deny: The Switch generates log messages when it discards an ARP packet from the VLAN.
Permit: The Switch generates log messages when it forwards an ARP packet from the VLAN.
All: The Switch generates log messages every time it receives an ARP packet from the VLAN.
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.