is odd number of links in lag group ok

Tue May 15 19:18:57 UTC 2018

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 at 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.