Operation Manual – IPv6H3C S5500-SI Series Ethernet Switches Chapter 1 IPv6 Basics Configuration1-12z RFC 1881: IPv6 Address Allocation Managementz RFC 1887: An Architecture for IPv6 Unicast Address Allocationz RFC 1981: Path MTU Discovery for IP version 6z RFC 2375: IPv6 Multicast Address Assignmentsz RFC 2460: Internet Protocol, Version 6 (IPv6) Specification.z RFC 2461: Neighbor Discovery for IP Version 6 (IPv6)z RFC 2462: IPv6 Stateless Address Autoconfigurationz RFC 2463: Internet Control Message Protocol (ICMPv6) for the Internet ProtocolVersion 6 (IPv6) Specificationz RFC 2464: Transmission of IPv6 Packets over Ethernet Networksz RFC 2526: Reserved IPv6 Subnet Anycast Addressesz RFC 3307: Allocation Guidelines for IPv6 Multicast Addressesz RFC 3513: Internet Protocol Version 6 (IPv6) Addressing Architecturez RFC 3596: DNS Extensions to Support IP Version 61.2 IPv6 Basics Configuration Task ListComplete the following tasks to perform IPv6 basics configuration:Task RemarksConfiguring Basic IPv6 Functions RequiredConfiguring IPv6 NDP OptionalConfiguring PMTU Discovery OptionalConfiguring IPv6 TCP Properties OptionalConfiguring ICMPv6 Packet Sending OptionalConfiguring IPv6 DNS Optional1.3 Configuring Basic IPv6 Functions1.3.1 Enabling the IPv6 Packet Forwarding FunctionBefore IPv6-related configurations, you must enable the IPv6 packet forwardingfunction. Otherwise, an interface cannot forward IPv6 packets even if an IPv6 addressis configured, resulting in communication failures in the IPv6 network.Follow these steps to enable the IPv6 packet forwarding function: