D-Link DGS-3630 Emulator 1 - Page 822
data-glean
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dhcp-pd-ext DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide Specified that IPv6 prefix should be snooped in DHCPv6 PD packets. PD snooping runs in the extension mode. 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. The following modes are supported in PD Snooping: • Standard Mode: The DHCPv6 Request/Confirm (with Reply) packet triggers PD Snooping to set up a new binding entry. The DHCPv6 Renew (with Reply) packet triggers PD Snooping to specify a new lease time for the existing binding entry. • Extension Mode: The DHCPv6 Request/Confirm Renew/Rebind (with Reply) packet triggers PD Snooping to set up a new binding entry. The DHCPv6 Renew (with Reply) packet triggers PD Snooping to specify a new lease time for the existing binding entry. 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)# 61-3 data-glean This command is used to enable the data gleaning function. Use the no form of this command to revert to the default setting. data-glean no data-glean Parameters None. 817
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