ZyXEL Communications ES3500 Series 26.6 ARP Inspection Status, VID, VID, Port, Apply, Apply, Index, Cancel, End VID, Enabled, Option82, of filters, Information, MAC Address, Total number

	Chapter 26 IP Source Guard
Table 86 DHCP Snooping VLAN Configure (continued)
LABEL	DESCRIPTION
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 Section 26.5 on page 223.
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 Chapter 8 on page 84. You can specify the DHCP VLAN in the DHCP Snooping
	Configure screen. See Section 26.5 on page 223.
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.

26.6 ARP Inspection Status

Use this screen to look at the current list of MAC address filters that were created because the Switch identified an unauthorized ARP packet. When the Switch identifies an unauthorized ARP packet, it automatically creates a MAC address filter to block traffic from the source MAC address and source VLAN ID of the unauthorized ARP packet. To open this screen, click Advanced Application > IP Source Guard > ARP Inspection.

Figure 123 ARP Inspection Status

The following table describes the labels in this screen.

Table 87 ARP Inspection Status

LABEL	DESCRIPTION
Total number	This field displays the current number of MAC address filters that were created because the
of filters	Switch identified unauthorized ARP packets.
Index	This field displays a sequential number for each MAC address filter.
MAC Address	This field displays the source MAC address in the MAC address filter.
VID	This field displays the source VLAN ID in the MAC address filter.
Port	This field displays the source port of the discarded ARP packet.

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ES3500 Series User’s Guide