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Version: - This field
specifies the version number of the protocol and should be set to 6 for IPV6.
Traffic class: -
This
field specifies the traffic class or priority of the packet.
Flow label:- This field can
be used to identify the QoS requested by the packet. It provides a
special treatment for the packet and needs special handling by the intervening routers
Payload length:-
This
field identifies the total length of the data excluding the basic header and it
is limited to 65,535 bytes because only 16 bits is used in basic header to
represent the payload length. To send larger payloads use the options in
extension header.
Next header: - This field
identifies the type of extension header (optional) header that follows the
basic header.[There are up to 6 extension headers]. If this header is the last
IP header, this field tells which transport (upper layer) protocol handler to
pass the packet in [as in Protocol field in IPV4]
Hop limit:- Same as TTL in
IPv4, it contains the number hops the packet has to traverse in the network and
it is decremented at each hop.
Source address:
- 16
Byte (128 bits) to identify the source of the datagram
Destination
address: - 16
Byte (128 bits) to typically to identify the final destination of the datagram
• However, if the source routing is used, this
field contains the address of the next router.
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