Re: IPv6 addr and route is gone after adding port to vrf (5.2.0+)

From: David Ahern <dsahern@gmail.com>
To: Ben Greear <greearb@candelatech.com>, netdev <netdev@vger.kernel.org>
Subject: Re: IPv6 addr and route is gone after adding port to vrf (5.2.0+)
Date: Fri, 11 Oct 2019 14:35:23 -0600	[thread overview]
Message-ID: <b236a2b6-a959-34cf-4d15-142a7b594ab0@gmail.com> (raw)
In-Reply-To: <3cd9b1a7-bf87-8bd2-84f4-503f300e847b@candelatech.com>

On 10/11/19 7:57 AM, Ben Greear wrote:
>> The down-up cycling is done on purpose - to clear out neigh entries and
>> routes associated with the device under the old VRF. All entries must be
>> created with the device in the new VRF.
> 
> I believe I found another thing to be aware of relating to this.
> 
> My logic has been to do supplicant, then do DHCP, and only when DHCP
> responds do I set up the networking for the wifi station.
> 
> It is at this time that I would be creating a VRF (or using routing rules
> if not using VRF).
> 
> But, when I add the station to the newly created vrf, then it bounces it,
> and that causes supplicant to have to re-associate  (I think, lots of
> moving
> pieces, so I could be missing something).
> 
> Any chance you could just clear the neighbor entries and routes w/out
> bouncing
> the interface?

yes, it is annoying. I have been meaning to fix that, but never found
the motivation to do it. If you have the time, it would be worth
avoiding the overhead.