[Babel-users] v4-over-v6 implementation

[Dave Taht]

On Mon, Apr 20, 2020 at 7:52 AM Juliusz Chroboczek <jch at irif.fr> wrote:
>
> >> However, relying on a kernel error looks a bit ugly to me, and I've put
> >> it on my to-do list to catch the error earlier.
>
> > It should not re-advertise the route if it cannot install it, IMHO.
>
> It doesn't -- it detects the error and then marks the route as
> uninstalled.  However, it doesn't try with an alternate route -- if
> a route to a given destination fails, we simply fallback to the default
> route.
>
> So either we add code to retry with higher-metric routes that might work,
> or we detect at startup whether the feature is available.

> Théo prefers
> the latter approach, I'm waiting to see how difficult it is.

I prefer the former approach, or rather a hybrid, detecting at startup
that you can't do ipv6 nexthops, and
filtering those routes out entirely from consideration for installation.

To misquote john gilmore: "The internet considers old linux kernels as
damage, and routes around them."

> -- Juliusz



-- 
Make Music, Not War

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-435-0729