So out of the current discussions a lot of people have claimed that ipv6 is bloated or suffers from second system syndrome, etc. So I decided to look at a linux kernel (HEAD I assume) and look at the differences between the v6 and v4 directories. I just crudely did a line count as a quick measure: ipv6: 68k lines ipv4: 97k lines ipv4 looks to have the tcp and udp implementations (35k) so backing that out it is about 62k lines. That's pretty comparable. Linux has full routing capability so the kernel implements it for both. So I'm just not getting where this "bloat" is. 10% growth for a second system syndrome seems almost miraculously good, imo. What am i missing? This is in complete agreement with my intuition 30 years ago that it was no big deal, at least from a software standpoint. Mike