Re: [LARTC] Load Balance and SNAT problem.

[Peter Rabbitson <rabbit@rabbit.us>]

Salim S I wrote:
> The caching is per destination and source ip. TOS, fwmark and input
> interface too, if present.

Interesting... It definitely did not work in my scenario though. I am 
going to test this again in the near future, and if you are right I will 
rest my case.

> Routing with netfilter does not solve cache problems anyway, cache will
> still be present, and it will be consulted before routing tables are
> hit.

This is true for locally generated traffic only. Any incomming/forwarded 
traffic can be controlled in the PREROUTING, thus the cache is never 
consulted.

> Both solutions work pretty well; there are die-hard fans for both of the
> above approaches. Recent archives of lartc have lot of discussions on
> it.

I am actually simply jealous that some people apparently get it to work 
in-kernel, and I can't seem to. My requirements are pretty simple:

o As transparrent as possible DGD, that can detect 2nd and 3rd hop failures
o Robust load balancing - connections are distributed over all available 
links, regardless of source and destination, with the possibility of 
assigning relative channel priorities
o NAT compatible - link hopping is not an option, traffic with a 
specific SRC/DST must stay where it started.

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