DHCPv6 Confirm in DOCSIS networks

[John Jason Brzozowski]

By the way who runs this list?

How do I get my work email address added?

On Fri, May 18, 2012 at 4:03 AM, Tore Anderson <
tore.anderson at redpill-linpro.com> wrote:

> My cable provider just got included me in their IPv6 pilot. One of the
> first things I noticed when testing (using a computer directly attached
> to the cable modem) was that DHCPv6 Confirm messages went unanswered.
> The first time I connected went fast, while all subsequent connections
> (e.g. after resuming from suspend) was slow, as the Confirm request had
> to time out before information from the cached lease was used.
>
> I understood from my provider that the likely cause was that their Cisco
> CNR DHCPv6 server did not support DHCPv6 Confirm, and they also pointed
> me to the following UNH-IOL document, which says «Transmission of DHCPv6
> Confirm message is not expected on a DOCSIS WAN network»:
>
>
> https://www.iol.unh.edu/services/testing/ipv6/grouptest/white_papers/CPE_IPv6_Test_Event_Whitepaper.pdf
>
> This strikes me as rather strange - as far as I can tell, the DHCPv6
> client has no way of determining if the Ethernet interface is running on
> is connected to a DOCSIS modem or something else, so I don't see how it
> could possibly selectively disable the use of Confirm in the case of
> DOCSIS.
>
> Does anyone have more information on why DHCPv6 Confirm wouldn't be
> expected and supported in DOCSIS networks? (Does it work in Comcast's
> network?)
>
> --
> Tore Anderson
> Redpill Linpro AS - http://www.redpill-linpro.com
>
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