Re: is odd number of links in lag group ok

[Ben Cannon <ben () 6by7 net>]

It will work fine if you have a good modern router.   Consider this; all evenly grouped LAGs are odd in their failed 
conditions.

-Ben

> On May 15, 2018, at 8:28 AM, Mark Tinka <mark.tinka () seacom mu> wrote:
>
>
>
> > On 15/May/18 17:20, Jared Mauch wrote:
> >
> > Much of this depends on the hardware, software and what hashing is used inbound
> > outbound traffic directions, etc.
> >
> > It will likely work the way you expect, but one may be warmer than the other if
> > traffic ends up overloading a single bucket in the hash.
>
> We haven't had a major issue when loading traffic over even or odd
> links. If you have decent hardware and software, it should all be fine,
> particularly if your traffic is all or mostly IP.
>
> If you've got non-IP traffic in there, and your box cannot look into the
> payload to determine entropy, then things could get interesting. But
> this will happen even when you have even links... it's not anything
> specific to how many member links you have in the LAG, but rather, the
> router's need to maintain per-flow load balancing with limited
> information beyond Layer 2 data.
>
> That said, an even number of links just leaves the warm & fuzzies turned
> on :-)...
>
> Mark.