Re: Relative performance of IPv6 and IPv4 for current users

[Sebastien Roy <Sebastien.Roy@Sun.COM>]

chuegen@cisco.com said:
> Being the enterprise network control freak that I am, I would really
> like a standardized ability to prefer IPv4 over IPv6 until we feel
> comfortable that IPv6 reachability and performance of the topology
> is up to par with the IPv4 network.

There is a way to do this if the OS implements rfc3484's policy table.
You can change the precedence of IPv4 addresses in this table to
accomplish this.  It's is described in section 10.3 of rfc3484.

> I'm sure we'll do fine, but I
> imagine we'll have a number of cases where we're asked to figure out
> performance problems and will end up realizing it's because IPv6 was
> used over IPv4.

Interestingly, my colleagues and I published a draft on "Dual Stack
IPv6 on by Default" (draft-roy-v6ops-v6onbydefault-00.txt) that
touches upon this briefly.  Version 01 of this draft was submitted
last weekend, so it should show up in the directory any day now.

-Seb