[Olsr-dev] gateway code

Teco Boot (spam-protected)
Tue Jul 24 13:56:16 CEST 2012

Op 24 jul. 2012, om 13:26 heeft Henning Rogge het volgende geschreven:

> On 07/24/2012 01:24 PM, Ferry Huberts wrote:
>> On 24-07-12 13:22, Henning Rogge wrote:
>>> On 07/24/2012 01:15 PM, Teco Boot wrote:
>>>> Manual interference with unmanaged tunnels is a request for trouble.
>>>> If there is a side effect on tunnel_down (e.g. removed routes), that
>>>> is how it is designed. Let's have a clean smart-gw.
>>> At the moment there would be no way to restore the route for the tunnel.
>>> That is why the mechanism was inside.
>>> Similar for mesh interfaces, if they go up again, OLSRd must restore the
>>> routes.
>> So I think I'm going to revert my changes to that code.
>> Agree?
> I am not sure if it is really needed, but I dislike the idea that a single if-down wrecks your tunnel to the gateway (and most likely your internet connection with it!).

If tunnel goes down, the multi-hop route to nearest gw is taken. Could be same gw, then nothing breaks.
If another gw is taken, we are back to nat_threshold or plain gw routing.

When we have multiple tunnels & conntrack & route policies, we can do much better than sticking on far_away gw that was selected long time ago. I do not prefer enhancing smart_gw with unneeded bypasses for cornercases.
Just me.

I'll discuss with Ferry what to do.


> What do you think?
> Henning Rogge
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