Date: Tue, 19 Feb 2019 14:06:52 +0100 From: Andreas Nilsson <andrnils@gmail.com> To: "Peter G." <freebsd@disroot.org> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Point-to-point using GRE over IPv6 -> not possible with a single /128 address on the server? Message-ID: <CAPS9%2BSso1CDQZD9n7Q%2B-Z-rqozUkhJqo_GvEmvowY8WjMnpcng@mail.gmail.com> In-Reply-To: <9ab1a9b1-e1e3-9f48-2c3e-35454bcd6e77@disroot.org> References: <95d8e3ea-af36-4d14-f280-908f92a96515@disroot.org> <9ab1a9b1-e1e3-9f48-2c3e-35454bcd6e77@disroot.org>
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On Tue, Feb 19, 2019 at 1:38 PM Peter G. <freebsd@disroot.org> wrote: > On 15/02/2019 17:49, Peter G. wrote: > > Now the GRE tunnel > > > >> ifconfig gre6 create > >> ifconfig gre6 inet6 fc01:e::100 fc:02:e::200 tunnelfib 6 > > #ifconfig: ioctl (SIOCAIFADDR): File exists > > > > Why is this not possible? Isn't the logic behind it the same as with > > IPv4? If not, why not? > > > > Does this mean it is not possible to have a point-to-point using IPv6 on > > a machine with only a single /128 address? > > Is this a stupid question, or something of the sort? Because I truly > don't understand why this wouldn't work. Thanks. > > PG > > I have not used gre with ipv6, so I cannot really be of any help. However for ipv4 you specify a netmask while setting up the interface, whereas you do not while setting up the ipv6. I also notice that you list fc02:e::200 for "other end" but in the commands you have fc:02:e::200 which I guess is just typo. Does ifconfig gre6 inet6 fc01:e::100 fc:02:e::200 prefixlen 128 tunnelfib 6 work? Or the whole thing ifconfig gre6 inet6 fc01:e::100 fc02:e::200 tunnel fc01:e::100 fc02:e::200 prefixlen 128 tunnelfib 6 Best regards Andreas
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