IPv6 packet Format

The format  of an IPv6 header is shown  in figure. Although IPv6 addresses are four  times  the size  of IPv4 address  the basic  IPv6 header is only twice the size of an Ipv4 header thus decreasing the  impact  of the larger address  fields. The files  of the IPv6 header are:

Version : This represents the IP version number. This  fields  value is 6 for IPv6 and 4 for IPv4. This field  is in the same location as the version  fields  in the IPv6 header  making it  simple for an IP node  to quickly distinguish an IPv4 packet  from  an IPv6 packet.

                                                                   Figure IPv6  packet format

Priority : This  enables a source  to identity  the desired delivery priority of the  packet .

Flow label: This  is used by a source to identify associated  packet  needing the  same  type of special handling. Such  as a real time  service  between a pair  of hosts .

Payload length: This  is the length of the portion of the  packet following  the header in octets. The  maximum  value  in this field is 65.535 if this field  contains zero it  means that the packet contains a payload larger than 64 K bytes and the actual  payload length value  is carried in a jumbo payload hop by hop option.

Next heard : This  identifies the type  of header  immediately followings  the eIPv6 header  and uses the same  values as the IPv4 protocol fields  where applicable. The next  header fields  can indicate an options  header  higher  layer  protocols  or no protocols above IP.

Hop limit: This  specifies the maximum  number of hops that a packet may take before  it is discarded. This value is set by the source and decremented by one by each  node  that forwards the packet the packet is discarded if the hop limit reaches zero. The comparable field in IPv4 is the TTL field it was renamed  for IPv6 because the value  limits  the number  hops, not  the amount  of time  that a packet  can stay in the  network.

Source address :This  is the IPv6 address of the originator of the  packet.

Destination address: This is the IPv6 address of the intended recipients of the packet.

 

 

Posted Date: 3/16/2013 5:56:24 AM | Location : United States

Ask an Expert

Related Discussions:- Ipv6 packet format - network layer and routing , Assignment Help, Ask Question on Ipv6 packet format - network layer and routing , Get Answer, Expert's Help, Ipv6 packet format - network layer and routing Discussions

Write discussion on Ipv6 packet format - network layer and routing
Your posts are moderated

Write your message here..

Related Questions

Determine sonet devices, Sonet Devices STS Mux or DMux either multiplex... Sonet Devices STS Mux or DMux either multiplexes signals from multiple sources into an STS or demultiplexes an STS into different destination signals. Regenerator is a repea

Illustrate the working of networking bus topology, Illustrate the working o... Illustrate the working of networking Bus Topology All stations attach, by appropriate hardware interfacing called as a tap, directly to a linear transmission medium, or bus. F

What is routing region, What is routing region? When hierarchical routi... What is routing region? When hierarchical routing is used, the routers are separated into what we call regions, with each router knowing all the details about how to route pack

Describe the tcp/ip reference model, Computer Networks 1. Differentiate... Computer Networks 1. Differentiate WAN and LAN. 2. Describe the TCP/IP Reference Model with diagram. 3. Explain Circuit switching and message switching. 4. List the fu

Advantages of ls over dv algorithm, Advantages of LS over DV algorithm ... Advantages of LS over DV algorithm There  are a number of advantages to link  state  protocols  especially when  compared to  the distance vector based  routing  protocols. The

The functions of the typical server program, What are the functions of the ... What are the functions of the typical server program? Ans) It waits for client-initiated requests. Implements many requests at the similar time. Takes care of VIP clients first.

State the security concerns, State the Security concerns The history of... State the Security concerns The history of security concerns is not new. They have been of great worry to man and for many centuries man has been endeavouring to devise new tec

Working of TCP - buffers, Q. Working of  TCP - buffers? TCP - buffers ... Q. Working of  TCP - buffers? TCP - buffers Sending & receiving buffers - Processes don't consume data at the same speed Sending site: - White section: unfilled

What are the types of transmission media, What are the types of Transmissio... What are the types of Transmission media? Signals are usually transmitted over some transmission media that are broadly divided in to two categories:- Guided Media: Th

A default route is analogous to a, A default route is analogous to a defaul... A default route is analogous to a default gateway. It is used to decrease the length of routing tables and to give complete routing capabilities when a router may not know the rout