D-Link DES-3552 Product Manual - Page 234

xStack® DES-3528/DES-3552 Series Layer 2 Stackable Fast Ethernet Managed Switch Web UI Reference Guide The fields that can be configured are described below: Parameter Description Port Use the drop-down menu to select the desired port. Ports (e.g.: 1:1, 1:7) Specify the ports for which to view or clear DHCP snooping entries. Tick the All check box to view or clear entries for all ports. Tick the IPv4 check box to view or clear the ports with IPv4 entries. Tick the IPv6 check box to view or clear the ports with IPv6 entries. Click the Find button to locate a specific entry based on the port number selected. Click the Clear button to clear all the information entered in the fields. Click the View All button to display all the existing entries. ND Snooping ND snooping is a security feature that provides network security by building and maintaining a ND snooping binding white list and by filtering "untrusted" hosts. ND Snooping process is designed for stateless auto-configuration assigned IPv6 address and manually configured IPv6 address. Whenever a host wants to assign an IPv6 address to its interface, it must perform Duplicate Address Detection first, which is composed of NDP packets. The NDP is also used to detect whether a host is still reachable. Such NDP packets can be used to determine whether to delete a binding or not. The binding entries generally are not permanent. Each binding has a lifetime, and some event may trigger the binding deletion. When their lifetime expires, or the event happens, this mechanism will delete the corresponding entry, or perform some process. ND Snooping Maximum Entry Settings Users can configure the maximum ND snooping entry for ports on this page. To view this window, click Security > IP-MAC-Port Binding (IMPB) > ND Snooping > ND Snooping Maximum Entry Settings, as shown below: 225