From fernando at gont.com.ar  Mon Jan  2 11:40:20 2023
From: fernando at gont.com.ar (Fernando Gont)
Date: Mon, 2 Jan 2023 11:40:20 -0300
Subject: [ipv6hackers] IPv6 in GCP (WTH?): default route
Message-ID: <215eaf79-10ef-754c-1ced-7751e32757f2@gont.com.ar>

Hi. all,

I happen to be playing with IPv6 on GCP, and seem to find a few 
"interesting" things.

RAs on the IPv6 subnet are as follows:

---- cut here ----
rdisc6 ens5
Soliciting ff02::2 (ff02::2) on ens5...

Hop limit                 :    undefined (      0x00)
Stateful address conf.    :          Yes
Stateful other conf.      :           No
Mobile home agent         :           No
Router preference         :       medium
Neighbor discovery proxy  :           No
Router lifetime           :            0 (0x00000000) seconds
Reachable time            :  unspecified (0x00000000)
Retransmit time           :  unspecified (0x00000000)
  Source link-layer address: 42:01:0A:0B:00:01
  MTU                      :         1460 bytes (valid)
  Route                    : 2600:1900:4121:3b52::/65
   Route preference        :       medium
   Route lifetime          :           90 (0x0000005a) seconds
  from fe80::4001:aff:fe0b:1
---- cut here ----

As you can tell from the RA, it has a Router Lifetime of 0, so a 
compliant implementation will not install an IPv6 default router.

(yes, the router sending this RA will work okay as a default router if 
you manually configure it as such, though).

GCP claims that you can get the default route for an interface by 
querying the local metaserver 
(https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address)... 
which I guess one would query over IPv4? :-)

Thoughts? Comments? Input?

Thanks!

Regards,
-- 
Fernando Gont
e-mail: fernando at gont.com.ar
PGP Fingerprint: 7F7F 686D 8AC9 3319 EEAD C1C8 D1D5 4B94 E301 6F01

From awalding at gmail.com  Mon Jan  2 12:58:32 2023
From: awalding at gmail.com (Andrew Walding)
Date: Mon, 2 Jan 2023 09:58:32 -0600
Subject: [ipv6hackers] IPv6 in GCP (WTH?): default route
In-Reply-To: <215eaf79-10ef-754c-1ced-7751e32757f2@gont.com.ar>
References: <215eaf79-10ef-754c-1ced-7751e32757f2@gont.com.ar>
Message-ID: <CAKvFoo=t15k0OqVxYJpKdBijnmcDNpsXPSJHzC8xGaJAU_xorg@mail.gmail.com>

The hyperlink does not work?.

On Mon, Jan 2, 2023 at 8:40 AM Fernando Gont <fernando at gont.com.ar> wrote:

> Hi. all,
>
> I happen to be playing with IPv6 on GCP, and seem to find a few
> "interesting" things.
>
> RAs on the IPv6 subnet are as follows:
>
> ---- cut here ----
> rdisc6 ens5
> Soliciting ff02::2 (ff02::2) on ens5...
>
> Hop limit                 :    undefined (      0x00)
> Stateful address conf.    :          Yes
> Stateful other conf.      :           No
> Mobile home agent         :           No
> Router preference         :       medium
> Neighbor discovery proxy  :           No
> Router lifetime           :            0 (0x00000000) seconds
> Reachable time            :  unspecified (0x00000000)
> Retransmit time           :  unspecified (0x00000000)
>   Source link-layer address: 42:01:0A:0B:00:01
>   MTU                      :         1460 bytes (valid)
>   Route                    : 2600:1900:4121:3b52::/65
>    Route preference        :       medium
>    Route lifetime          :           90 (0x0000005a) seconds
>   from fe80::4001:aff:fe0b:1
> ---- cut here ----
>
> As you can tell from the RA, it has a Router Lifetime of 0, so a
> compliant implementation will not install an IPv6 default router.
>
> (yes, the router sending this RA will work okay as a default router if
> you manually configure it as such, though).
>
> GCP claims that you can get the default route for an interface by
> querying the local metaserver
> (
> https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address)...
>
> which I guess one would query over IPv4? :-)
>
> Thoughts? Comments? Input?
>
> Thanks!
>
> Regards,
> --
> Fernando Gont
> e-mail: fernando at gont.com.ar
> PGP Fingerprint: 7F7F 686D 8AC9 3319 EEAD C1C8 D1D5 4B94 E301 6F01
> _______________________________________________
> Ipv6hackers mailing list
> Ipv6hackers at lists.si6networks.com
> https://lists.si6networks.com/mailman/listinfo/ipv6hackers
>

From fernando at gont.com.ar  Mon Jan  2 13:14:07 2023
From: fernando at gont.com.ar (Fernando Gont)
Date: Mon, 2 Jan 2023 13:14:07 -0300
Subject: [ipv6hackers] IPv6 in GCP (WTH?): default route
In-Reply-To: <CAKvFoo=t15k0OqVxYJpKdBijnmcDNpsXPSJHzC8xGaJAU_xorg@mail.gmail.com>
References: <215eaf79-10ef-754c-1ced-7751e32757f2@gont.com.ar>
 <CAKvFoo=t15k0OqVxYJpKdBijnmcDNpsXPSJHzC8xGaJAU_xorg@mail.gmail.com>
Message-ID: <5cf48d59-7ced-06a4-6304-3a74322813dd@gont.com.ar>

Hi, Andy,

My bad (recent bad MUA config resulted in an HTML post).

This is the link: 
https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address

Thanks!

Regards,
Fernando




On 2/1/23 12:58, Andrew Walding wrote:
> The hyperlink does not work?.
> 
> On Mon, Jan 2, 2023 at 8:40 AM Fernando Gont <fernando at gont.com.ar> wrote:
> 
>> Hi. all,
>>
>> I happen to be playing with IPv6 on GCP, and seem to find a few
>> "interesting" things.
>>
>> RAs on the IPv6 subnet are as follows:
>>
>> ---- cut here ----
>> rdisc6 ens5
>> Soliciting ff02::2 (ff02::2) on ens5...
>>
>> Hop limit                 :    undefined (      0x00)
>> Stateful address conf.    :          Yes
>> Stateful other conf.      :           No
>> Mobile home agent         :           No
>> Router preference         :       medium
>> Neighbor discovery proxy  :           No
>> Router lifetime           :            0 (0x00000000) seconds
>> Reachable time            :  unspecified (0x00000000)
>> Retransmit time           :  unspecified (0x00000000)
>>    Source link-layer address: 42:01:0A:0B:00:01
>>    MTU                      :         1460 bytes (valid)
>>    Route                    : 2600:1900:4121:3b52::/65
>>     Route preference        :       medium
>>     Route lifetime          :           90 (0x0000005a) seconds
>>    from fe80::4001:aff:fe0b:1
>> ---- cut here ----
>>
>> As you can tell from the RA, it has a Router Lifetime of 0, so a
>> compliant implementation will not install an IPv6 default router.
>>
>> (yes, the router sending this RA will work okay as a default router if
>> you manually configure it as such, though).
>>
>> GCP claims that you can get the default route for an interface by
>> querying the local metaserver
>> (
>> https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address)...
>>
>> which I guess one would query over IPv4? :-)
>>
>> Thoughts? Comments? Input?
>>
>> Thanks!
>>
>> Regards,
>> --
>> Fernando Gont
>> e-mail: fernando at gont.com.ar
>> PGP Fingerprint: 7F7F 686D 8AC9 3319 EEAD C1C8 D1D5 4B94 E301 6F01
>> _______________________________________________
>> Ipv6hackers mailing list
>> Ipv6hackers at lists.si6networks.com
>> https://lists.si6networks.com/mailman/listinfo/ipv6hackers
>>
> _______________________________________________
> Ipv6hackers mailing list
> Ipv6hackers at lists.si6networks.com
> https://lists.si6networks.com/mailman/listinfo/ipv6hackers

-- 
Fernando Gont
e-mail: fernando at gont.com.ar
PGP Fingerprint: 7F7F 686D 8AC9 3319 EEAD C1C8 D1D5 4B94 E301 6F01

From awalding at gmail.com  Mon Jan  2 13:17:35 2023
From: awalding at gmail.com (Andrew Walding)
Date: Mon, 2 Jan 2023 10:17:35 -0600
Subject: [ipv6hackers] IPv6 in GCP (WTH?): default route
In-Reply-To: <5cf48d59-7ced-06a4-6304-3a74322813dd@gont.com.ar>
References: <215eaf79-10ef-754c-1ced-7751e32757f2@gont.com.ar>
 <CAKvFoo=t15k0OqVxYJpKdBijnmcDNpsXPSJHzC8xGaJAU_xorg@mail.gmail.com>
 <5cf48d59-7ced-06a4-6304-3a74322813dd@gont.com.ar>
Message-ID: <CAKvFoo=vFUc2BMAGNrco7wZQHXwp=sv7qxR+G42zVQcAQU3iCg@mail.gmail.com>

Than you

On Mon, Jan 2, 2023 at 10:14 AM Fernando Gont <fernando at gont.com.ar> wrote:

> Hi, Andy,
>
> My bad (recent bad MUA config resulted in an HTML post).
>
> This is the link:
> https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address
>
> Thanks!
>
> Regards,
> Fernando
>
>
>
>
> On 2/1/23 12:58, Andrew Walding wrote:
> > The hyperlink does not work?.
> >
> > On Mon, Jan 2, 2023 at 8:40 AM Fernando Gont <fernando at gont.com.ar>
> wrote:
> >
> >> Hi. all,
> >>
> >> I happen to be playing with IPv6 on GCP, and seem to find a few
> >> "interesting" things.
> >>
> >> RAs on the IPv6 subnet are as follows:
> >>
> >> ---- cut here ----
> >> rdisc6 ens5
> >> Soliciting ff02::2 (ff02::2) on ens5...
> >>
> >> Hop limit                 :    undefined (      0x00)
> >> Stateful address conf.    :          Yes
> >> Stateful other conf.      :           No
> >> Mobile home agent         :           No
> >> Router preference         :       medium
> >> Neighbor discovery proxy  :           No
> >> Router lifetime           :            0 (0x00000000) seconds
> >> Reachable time            :  unspecified (0x00000000)
> >> Retransmit time           :  unspecified (0x00000000)
> >>    Source link-layer address: 42:01:0A:0B:00:01
> >>    MTU                      :         1460 bytes (valid)
> >>    Route                    : 2600:1900:4121:3b52::/65
> >>     Route preference        :       medium
> >>     Route lifetime          :           90 (0x0000005a) seconds
> >>    from fe80::4001:aff:fe0b:1
> >> ---- cut here ----
> >>
> >> As you can tell from the RA, it has a Router Lifetime of 0, so a
> >> compliant implementation will not install an IPv6 default router.
> >>
> >> (yes, the router sending this RA will work okay as a default router if
> >> you manually configure it as such, though).
> >>
> >> GCP claims that you can get the default route for an interface by
> >> querying the local metaserver
> >> (
> >>
> https://cloud.google.com/compute/docs/ip-addresses/configure-ipv6-address).
> ..
> >>
> >> which I guess one would query over IPv4? :-)
> >>
> >> Thoughts? Comments? Input?
> >>
> >> Thanks!
> >>
> >> Regards,
> >> --
> >> Fernando Gont
> >> e-mail: fernando at gont.com.ar
> >> PGP Fingerprint: 7F7F 686D 8AC9 3319 EEAD C1C8 D1D5 4B94 E301 6F01
> >> _______________________________________________
> >> Ipv6hackers mailing list
> >> Ipv6hackers at lists.si6networks.com
> >> https://lists.si6networks.com/mailman/listinfo/ipv6hackers
> >>
> > _______________________________________________
> > Ipv6hackers mailing list
> > Ipv6hackers at lists.si6networks.com
> > https://lists.si6networks.com/mailman/listinfo/ipv6hackers
>
> --
> Fernando Gont
> e-mail: fernando at gont.com.ar
> PGP Fingerprint: 7F7F 686D 8AC9 3319 EEAD C1C8 D1D5 4B94 E301 6F01
>