D-Link DGS-3130 Emulator - Page 475

DGS-3130 Layer 3 Stackable Managed Switch CLI Reference Guide Default By default, all protocols are disabled. Command Mode IPv6 Snooping Configuration Mode. Command Default Level Level: 12. Usage Guideline Neighbor Discovery (ND) snooping is designed for IPv6 stateless address autoconfiguration and manually configured IPv6 addresses. Before assigning an IPv6 address, the host must perform Duplicate Address Detection (DAD) first. ND snooping detects DAD messages, which include 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. DHCPv6 snooping sniffs the DHCPv6 packets sent between the DHCPv6 client and server in the address assignment procedure. When a DHCPv6 client successfully gets a valid IPv6 address, DHCPv6 snooping creates its binding database. DHCP-PD snooping sniffs DHCPv6 Prefix Delegation (PD) packets between the Delegating Router (assigned IPv6 prefix) and corresponding Requesting Router to set up prefix bindings. Example This example shows how to enable DHCPv6 snooping. Switch# configure terminal Switch(config)# ipv6 snooping policy policy1 Switch(config-ipv6-snooping)# protocol dhcp Switch(config-ipv6-snooping)# 43-3 limit address-count This command is used to limit the maximum number of IPv6 snooping binding entries. Use the no form of this command to revert to the default setting. limit address-count MAXIMUM no limit address-count Parameters MAXIMUM Specifies the maximum number of IPv6 snooping binding entries. The range is from 0 to 1024. Default By default, there is no limit configured. Command Mode IPv6 Snooping Configuration Mode. 471