ZyXEL Communications XS3800-28, User Manual, Page: 612 / 789

Chapter 83 DHCP Snooping
XS3800-28 User’s Guide
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83.3 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 481 SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Setup
Invalid Interfaces This field displays the number of bindings the Switch has ignored because the port number
was a trusted interface or does not exist anymore.
Parse Failures 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.
Expired Leases This field displays the number of bindings the Switch has ignored because the lease time
had already expired.
Unsupported
VLANs
This field displays the number of bindings the Switch has ignored because the VLAN ID does
not exist anymore.
Table 326 SECURITY > IPv4 Source Guard > DHCP Snooping > DHCP Snp. Status (continued)
LABEL DESCRIPTION