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Date: Tue, 03 Nov 2020 12:51:51 +1100
From: Dean Scarff <dos@scarff.id.au>
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Subject: Re: [Cake] =?utf-8?q?NLA=5FF=5FNESTED_is_missing?=
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 On Tue, 3 Nov 2020 03:14:37 +0200, Jonathan Morton wrote:
>> On 1 Nov, 2020, at 12:15 pm, Dean Scarff <dos@scarff.id.au> wrote:
>>
>>  Error: NLA_F_NESTED is missing.
>
> Since you're running an up-to-date kernel, you should check you are
> also running up-to-date userspace tools.  That flag is associated 
> with
> the interface between the two.
>
>  - Jonathan Morton

 Thanks.  I figured the same thing (see my other post today), but if 
 anything, one of the userspace versions I tested (iproute2 5.9.0) is 
 *too* new (released Oct 19 for 5.9 kernels, see:
 https://lwn.net/Articles/834755/ ).  For good measure, I also tested 
 with Debian's iproute2_5.7.0-1 ;)

 Either way though, I can debug the userspace tools, which should get me 
 to the root cause.