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Subject: Re: Help with IPv6 router gateway config, Comcast, DHCP, dnsmasq
From: Tom Pusateri <pusateri@bangj.com>
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Date: Sat, 1 Nov 2014 11:23:13 -0400
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To: Rui Paulo <rpaulo@me.com>
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Cc: freebsd-net@freebsd.org, Chris Inacio <nacho319@gmail.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=