I think the right term is "multiple WAN paths". There may only be
a single SP offering useful service and you just need more bandwidth
so you have two links to the SP.
Any homenet solution where the local address is taken into account
should work as well as it would with different providers. Aka: not
using "normal" ECMP. The only interesting case is when we have a path
selection where only provider side information is used that would be
the same for both links. Eg: Multicast RPF or the like. Thats when
classical ECMP could come into play wrt to WAN links.
The other, case is what i thought to be useful, eg:
in-home powerline adapters with wifi in parallel. And even thought this
mightb e ECMP just by hopcount, it seems useful to consider methods
for non-equal cost load balancing . Not quite sure how much measurement
based babel would support this...
Cheers
Toerless
On Tue, Aug 11, 2015 at 07:57:56PM +0200, Ole Troan wrote:
> > I am interested to learn what people think about whether equal-cost
> > multi-path routes are needed in homenet. Given the previous discussion
> > about parallel wireless links - which I know I have in my house and can't
> > use - I've been wondering if these have been considered.
> >
> > ECMP is critical in the data-center and backbone, but I'm interested in
> > seeing what the reasoning is as to why it isn't or is needed in the homenet
> > scenarios.
>
> I don???t think homenet has any special requirements with regards to ECMP. I
> think it has been assumed that will work like in any other network. I
> certainly expect the homenet to support ECMP.
> (parallel wireless links may be a bad example though, as they are probably
> quite unlikely to be equal.)
>
> the main items of discussion in a homenet context is load balancing across
> multiple providers. in the IPv6 multi-prefix multi-homing architecture load
> balancing is done by the hosts, not by the network.
>
> cheers,
> Ole
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Toerless Eckert, [email protected]
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