Linux and ULA support and default route
Holger.Zuleger at hznet.de
Fri Oct 14 14:12:26 CEST 2016
>> Imagine a setup with *two* routers. One of them has broken Internet,
>> the other is working. How can the hosts decide if both keep announcing
>> themselves as "I can reach anything"?
> in the general case the host still has to take the 'I can reach anything' announcement with a pinch of salt.
> and it should be able to try both (or more) connections and react accordingly when one fails.
...which is the default host behaviour if the OS supports RFC4861.
Sadly some "user friendly" network mangers breaks this and setting a
static route with a better metric to just one(!) router.
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