Re: NetworkManager creating IPv6 routes on the fly?

[Pavel Simerda <psimerda redhat com>]

----- Original Message -----
> From: "Dan Irwin" <rummymobile gmail com>
> To: networkmanager-list gnome org
> Sent: Tuesday, February 11, 2014 7:45:00 AM
> Subject: NetworkManager creating IPv6 routes on the fly?
>
> Following up my previous post, I am noticing something creating IPv6 routes
> on my local routing table:
>
> 2404:6800:4004:805::1007 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::1003 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::1005 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::1007 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::1009 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::100a via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::100b via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::100c via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::100f via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::1011 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::1015 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4006:806::101d via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4008:c03::54 via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2404:6800:4008:c03::5f via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
> 2a00:1450:4001:807::100f via fe80::d267:e5ff:feb5:235b dev em1 proto static
> metric 1
>
> Seeing as this seems "weird", I'm assuming these are also created by
> NetworkManager.
>
> My only question is why? These routes surely are not needed for anything if
> we have a working default route.

Those are device routes created to mimic the kernel-installed routes but with a proper metric to prioritize 
the selected interface. It is a hack in 0.9.8 (and prior) to get over kernel's crazy autoconfiguration 
feature.

Pavel

> Cheers,
>
> Dan
>
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