Comcast Support (from NANOG Digest, Vol 84, Issue 24)

Brzozowski, John John_Brzozowski at
Mon Jan 26 18:19:03 UTC 2015

From the looks of it, there is no IPv6 PD support per RFC3633.

John Jason Brzozowski
Comcast Cable
p) 484-962-0060
e) john_brzozowski at

-----Original Message-----
From: Rafael de Oliveira Ribeiro <rafael.ribeiro at>
Organization: Rede Nacional de ensino e Pesquisa
Date: Monday, January 26, 2015 at 11:00
To: John Brzozowski <John_Brzozowski at>, NANOG
<nanog at>
Subject: Re: Comcast Support (from NANOG Digest, Vol 84, Issue 24)

>Dear John,
>On 24/01/2015 10:00, nanog-request at wrote:
>> Date: Fri, 23 Jan 2015 17:14:11 +0000
>> From: "Brzozowski, John" <John_Brzozowski at>
>> To: "nanog at" <nanog at>
>> Subject: Comcast Support (from NANOG Digest, Vol 84, Issue 23)
>> Message-ID: <D0E7E8E3.21D5AA%john_brzozowski at>
>> Content-Type: text/plain; charset="utf-8"
>> For customers where you bring your own cable modem or have one of the
>>above in bridge mode we have enabled IPv6 support for you as well.
>>However, your router behind the modem must be running software and
>>configured with IPv6 support.  Specifically, your router needs to be
>>support stateful DHCPv6 for IPv6 address and prefix acquisition.  We
>>have received a number of reports from customers that the Juniper SRX
>>does not appear to properly support IPv6.  We are working with Juniper
>>and also recommend that you reach out to Juniper as well.
>Care to share scenarios where the SRXs do not perform well with DHCPv6?
>Any specific model?
>Thanks in advance,
>Rafael de Oliveira Ribeiro
>DAERO - Gerencia de Operacoes
>RNP - Rede Nacional de Ensino e Pesquisa
>Tel.: +55 21 2102 9659  - iNOC: 1916*767

More information about the NANOG mailing list