On Tue, Feb 13, 2018 at 2:05 AM, David Ahern <dsah...@gmail.com> wrote:
> Hardware supports multipath selection using the standard L4 5-tuple
> instead of just L3 and the flow label. In addition, some network
> operators prefer IPv6 path selection to use the 5-tuple.
The HW supports using flow label and AFAIK that is the preferred approach
by the community (?)
> To that end, add support to IPv6 for multipath hash policy
so a question comes up if/what are the disadvantaged
to support 5-tuple. E.g Tom was commenting that such DPI is problematic
when multiple IPv6 header extensions are used.
> similar to bf4e0a3db97eb ("net: ipv4: add support for ECMP hash policy
> choice").
> The default is still L3 which covers source and destination addresses
> along with flow label and IPv6 protocol.
>
> A separate sysctl is added for IPv6, allowing IPv4 and IPv6 to use
> different algorithms if desired.
