D-Link DGS-1520 User Manual - Page 457

DGS-1520 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide Parameter Data Glean VID List Description detects DAD messages (DAD Neighbor Solicitation (NS) and DAD Neighbor Advertisement (NA)) to build its binding database. The NDP packet (NS and NA) is also used to detect whether a host is still reachable and determine whether to delete a binding or not. DHCP-PD snooping performs DHCPv6 snooping of Prefix Delegation (PD) to setup bindings between the Delegating Router (assigned with an IPv6 prefix) and the corresponding Requesting Router. The bindings can be used to validate the source prefix in the packets. Select to enable or disable the data-glean function here. In some circumstances (DAD-NS packet lost or Switch reboot), a valid IPv6 address cannot be found in the binding table for some devices and as a result traffic to and from these devices are denied by the IPv6 source guard. The data-glean function provides a method for the Switch to recover the lost IPv6 addresses using IPv6 Duplicate Address Detection (DAD). Enter the VLAN ID list used here. Click the Apply button to accept the changes made. Click the Edit button to re-configure the specific entry. Click the Delete button to remove the specified entry. To view the following window, select the IPv6 Snooping DHCP Entry Settings tab, as shown below: Figure 9-57 IPv6 Snooping (IPv6 Snooping DHCP Entry Settings) Window The fields that can be configured are described below: Parameter Unit From Port - To Port Binding Max Entries Description Select the Switch stacking unit ID here. Select the range of ports that will be used here. Enter the maximum number of IPv6 snooping binding entries that is allowed here. The range is from 0 to 511. Click the Apply button to accept the changes made. Click the Clear button to clear DHCPv6 snooping entries from the specified port. 447