On 9/28/15, 1:57 AM, Matthew Dupre wrote:
Hi,
I'm interested in the Linux kernel's support for per-flow IPv4 ECMP (i.e.
consistent path selection based on a hash of the connection tuple). I'd been
led to believe[1] that this depended on the route cache, which was removed in
3.6.
However, I tested a route with multiple next hops on a 3.10 and 3.13 kernel,
and ECMP was per-flow! Obviously I'm pleased that this was the case, but I'd
like to understand why this is supported, and whether I can rely on it in
future.
Could anyone give me a little clarification on whether this is now supported by
some means other than the route cache, and whether that support is intended to
be continued?
This is being worked on currently by Peter Nørlund
https://lwn.net/Articles/657431/
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