IPv6 基本功能IPv6 ND,IPv6 PMTU,IPv6 FIB,IPv6 ACL,ICMPv6,DNSv6,DHCPv6 IPv6 隧道技术手工隧道,自动隧道,GRE 隧道,6over4 隧道,6to4,ISATAP 组播IGMP V1/V2/V3,PIM SM,PIM DM,MSDP,MBGP,IPv6 PIM,MLD VPNIPSec VPN,GRE VPN,DSVPN,A2A VPN,L2TP VPN, L2TPv3VPN, VxLAN ...