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Date:      Sat, 1 Nov 2014 11:23:13 -0400
From:      Tom Pusateri <pusateri@bangj.com>
To:        Rui Paulo <rpaulo@me.com>
Cc:        freebsd-net@freebsd.org, Chris Inacio <nacho319@gmail.com>
Subject:   Re: Help with IPv6 router gateway config, Comcast, DHCP, dnsmasq
Message-ID:  <92438892-0AAC-4866-B7D9-BAA5B4AF9D9D@bangj.com>
In-Reply-To: <44D1EB57-CFB0-4E78-822C-29A9FEA85A66@me.com>
References:  <CAG_PEez92O0%2Ba-_OsQ%2BmUx_s58ttkPcvW05e8x3-CHWHv2kp1g@mail.gmail.com> <44D1EB57-CFB0-4E78-822C-29A9FEA85A66@me.com>

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> On Nov 1, 2014, at 1:53 AM, Rui Paulo <rpaulo@me.com> wrote:
>=20
>> I find the man pages for dhcp6 pretty awful.  The man pages describe =
the
>> options - but not being able to find what /64 is assigned to dhcp6c =
other
>> than running in debug mode seems crazy.
>=20
> There's an alternative: dhclient from ports which includes DHCPv6 =
support with prefix delegation.
>=20


Chris' config error caused dhcp6c not to configure his downstream =
interface.

dhclient from ports will only work with the default prefix length =
assigned by the provider. For all providers I have encountered, this is =
/64 and a good choice. But if you want multiple /64's for multiple =
interfaces, you have to request a larger prefix (/56 or /60 depending on =
the policy of the provider). dhclient in ports will not let you do this.

In Chris' case, he only has a single downstream interface (for now) and =
so dhclient in ports would work for that.

Tom=



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