Dhcp Snooping Setup - ZyXEL Communications GS1920v2 Series User Manual

Table 220 SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Status (continued)
LABEL
Parse Failures
Expired Leases
Unsupported
VLANs

63.3 DHCP Snooping Setup

Use this screen to enable DHCP snooping on the Switch (not on specific VLAN), specify the VLAN where
the default DHCP server is located, and configure the DHCP snooping database. The DHCP snooping
database stores the current bindings on a secure, external TFTP server so that they are still available after
a restart.
To open this screen, click SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Setup.
Note: The input string of any field in this screen should not contain [ ? ], [ | ], [ ' ], [ " ], or [ , ].
Figure 285 SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Setup
The following table describes the labels in this screen.
Table 221 SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Setup
LABEL
DHCP Snooping Setup
Active
Chapter 63 DHCP Snooping
DESCRIPTION
This field displays the number of bindings the Switch has ignored because the Switch was
unable to understand the binding in the DHCP binding database.
This field displays the number of bindings the Switch has ignored because the lease time
had already expired.
This field displays the number of bindings the Switch has ignored because the VLAN ID does
not exist anymore.
DESCRIPTION
Enable the switch button to enable DHCP snooping on the Switch. You still have to
enable DHCP snooping on specific VLAN and specify trusted ports.
Note: If DHCP is enabled and there are no trusted ports, DHCP requests will
not succeed.
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