Disabling IPv6 on *one* network interface in Debian

[Matt Addison]

On Fri, Feb 4, 2011 at 00:47, Frank Bulk <frnkblk at iname.com> wrote:

> I tried that, no luck.
> ===================================
> iface eth0.100 inet static
>       pre-up sysctl -w net.ipv6.conf.eth0/100.autoconf=0
>       pre-up sysctl -w net.ipv6.conf.eth0/100.accept_ra=0
>       address a.b.c.d
>       netmask 255.255.255.0
>       network a.b.c.0
> ===================================
>
> Results in
>        error: "net.ipv6.conf.eth0.100.autoconf" is an unknown key


The /proc files (and sysctls) will not be populated until the interface is
in an up state (ie, at post-up), try just setting it in 'post-up' parameter
not 'pre-up'

Alternatively you could set the net.ipv6.conf.default.x values at boot, then
enable v6 explicitly on the interfaces you want it on (using the
aforementioned post-up parameter).

~Matt
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