ZyXEL VES1724-56 User Guide - Page 254
DHCP Snooping Con
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Chapter 26 IP Source Guard Table 107 DHCP Snooping (continued) LABEL Failed writes Database detail First successful access Last ignored bindings counters Binding collisions Invalid interfaces Parse failures Expired leases Unsupported vlans Last ignored time Total ignored bindings counters Binding collisions Invalid interfaces Parse failures Expired leases Unsupported vlans DESCRIPTION This field displays the number of times the Switch was unable to update the bindings in the DHCP snooping database. This field displays the first time the Switch accessed the DHCP snooping database for any reason. This section displays the number of times and the reasons the Switch ignored bindings the last time it read bindings from the DHCP binding database. You can clear these counters by restarting the Switch or using CLI commands. See the CLI Reference Guide. This field displays the number of bindings the Switch ignored because the Switch already had a binding with the same MAC address and VLAN ID. This field displays the number of bindings the Switch ignored because the port number was a trusted interface or does not exist anymore. This field displays the number of bindings the Switch ignored because the Switch was unable to understand the binding in the DHCP binding database. This field displays the number of bindings the Switch ignored because the lease time had already expired. This field displays the number of bindings the Switch ignored because the VLAN ID does not exist anymore. This field displays the last time the Switch ignored any bindings for any reason from the DHCP binding database. This section displays the reasons the Switch has ignored bindings any time it read bindings from the DHCP binding database. You can clear these counters by restarting the Switch or using CLI commands. See the CLI Reference Guide. This field displays the number of bindings the Switch has ignored because the Switch already had a binding with the same MAC address and VLAN ID. This field displays the number of bindings the Switch has ignored because the port number was a trusted interface or does not exist anymore. 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. 26.5 DHCP Snooping Configure 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 254 VES1724-56 User's Guide