Search code examples
securitynetwork-programmingipv6checksum

IPv4 header included checksum but not in IPv6, why?

I have explored more to find why checksum is removed from ipv6 but I couldn't get exact answer, How the mutable fields in IPv6 protected?

Solution

  • Higher layer (>=4) protocols like TCP and UDP still have their own checksums. So many lower layer protocols (<=2) already have their own checksums that having another checksum in IP (layer 3) was seen as unnecessary overhead.

    It was an engineering decision.