This appendix describes the link-layer encapsulation for Internet Protocol version 6 (IPv6) packets for common local area network (LAN) and wide area network (WAN) technologies and describes how IPv6 packets are encapsulated when sent across an IPv4 infrastructure.
On LAN and WAN media, IPv6 packets exist as link-layer frames. Figure A-1 shows the basic structure of IPv6 packets sent over LAN and WAN media.
Figure A-1. Basic structure of IPv6 packets sent on LAN and WAN media
The structure of IPv6 packets sent on LAN and WAN media consists of the following:
A link-layer header and ...