IPv6 Packet Format An IPv6 packet has three parts: an IPv6 basic header, one or more IPv6 extension headers, and an upper-layer protocol data unit (PDU). An upper-layer PDU is composed of the upper-layer protocol header and its payload, which maybe an ICMPv6 packet, a TCP packet,...
This chapter describes the IPv6 header, specifically detailing the use of IPv6 header extensions to enable IP options. It discusses the implications of the IPv6 extension headers, the way they work, and the way they differ from the IP option headers used with IPv4. The chapter introduces the...
We may divide IPv6 datagram packet header as three parts. 1( IPv6 datagram packet header 2( Extension Header 3( Upper Layer Protocol Data, as shown in above image. IPv6 datagram packet has extension headers of varying lengths. If extension headers are present in IPv6 datagram packet, a Ne...
Malicious attacks can be initiated using these IPv6 extension headers. For example, the routing header can be used to specify a node that packets must pass through. The fragment header can be used to set the MTU to a small value on the source node, leading to a large number of data fra...
The IPv6 basic header is designed in a simple and fixed-length format for the purpose of efficient forwarding. Extra data and options needed for packet processing are encoded into extension headers. Such a design makes possible the adding of extension headers for special purposes. In this paper...
IPV6 EXTENSION HEADERS This section reviews the headers used by the IPv6 protocol. The Concept IPv6 is using two distinct types of headers: Main/Regular IPv6 Header and IPv6 Extension Headers. The main IPv6 header is equivalent to the basic IPv4 one despite some field differences that are ...
Figure 6.IPv6 Packet Header Format IPv6 Extension Headers Optional extension headers and the data portion of the packet are after the eight fields of the base IPv6 packet header. If present, each extension header is aligned to 64 bits....
IPv6 Header and ExtensionsThe IPv6 protocol defines a set of headers, including the basic IPv6 header and the IPv6 extension headers. Header FormatThe following figure shows the elements that appear in the IPv6 header and the order in which the elements appear....
The last extension header indicates the upper layer protocol (such as TCP, UDP, or ICMPv6) contained within the upper layer protocol data unit. The IPv6 header and extension headers replace the existing IPv4 header with options. The new extension header format allows IPv6 to be augmented to ...
For example, if an IPv6 packet of a Flow includes a Hop-by-Hop Options header, a Destination Options header, a Fragment header, and Destination Options header, the ipv6ExtensionHeaderTypeCountList IE will report: the count of Hop-by-Hop Options headers, the occurrences of the Destination...