[139801] in North American Network Operators' Group
Re: Comcast's 6to4 Relays
daemon@ATHENA.MIT.EDU (Owen DeLong)
Wed Apr 20 08:53:09 2011
In-Reply-To: <20110420022657.6E18311C5@smtp02.zmail.com>
From: Owen DeLong <owen@delong.com>
Date: Wed, 20 Apr 2011 08:47:00 -0400
To: Bhoomi Jain <bhoomij@india.com>
Cc: NANOG <nanog@nanog.org>, "Brzozowski,
John" <John_Brzozowski@Cable.Comcast.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
The better solution to that problem is to get additional 6to4 relays deploye=
d closer to India. Perhaps encouraging Tata to take some leadership in that a=
rea, for example.
I do not believe that the opening of the Comcast relays will harm BGP best p=
ath selection for the 6to4 prefix except in rather broken and/or pathologica=
l cases of BGP best path selection. Those cases should be relatively easy to=
identify and correct locally without preventing Comcast from significantly i=
mproving the 6to4 situation for the areas they serve by opening their relays=
.
I applaud John for his leadership in this area and I think the IPv6 work bei=
ng done by Comcast sets a good example for the community. As a Comcast custo=
mer, praising Comcast does not come easy to me, but, in this area, they are d=
oing excellent things and should be commended.
Owen
Sent from my iPad
On Apr 19, 2011, at 10:26 PM, Bhoomi Jain <bhoomij@india.com> wrote:
> Mr. John,
>=20
> I thank you for asking the advice of the community.
>=20
> As our colleagues suggest, having 6to4 relays inside the network helps to r=
educe the latency. Opening up your generous services to a larger Internet c=
ommunity by advertising the 192.88.99.0/24 BGP prefix outside the network co=
uld have extreme and unintended consequences.
>=20
> To give you an idea, a lot of the Internet in India depends on the service=
of the Tata companies, with international routing coming from Tata Communic=
ations AS 6453. Announcing 192.88.99.0/24 to 6453 as a customer, I would wo=
rry about its treatment as BGP best-path, in place of closer 6to4 relays. A=
s you understand, these circuits are very far away, and also very full. Thi=
s is not something I would recommend.
>=20
> Sincerely,
> Bhoomi Jain
>=20
> At 19 Apr 2011 22:51:24 +0200 (CEST) from "Brzozowski, John" <John_Brzozow=
ski@Cable.Comcast.com>:
>=20
>>=20
>> Folks,
>> Since deploying our 6to4 relays, Comcast has observed a substantial
>> reduction in the latency associated with the use of 6to4. As such we are
>> contemplating further opening our relays for use by others. The
>> availability of our 6to4 relays should improve the experience of others
>> using 6to4 as a means to access content and services over IPv6.
>> We have been open about our IPv6 activities and wanted to follow suit by
>> reaching out to the community and soliciting feedback before moving
>> forward. As always we wish to continue to advocate and support the
>> universal deployment of IPv6.
>> Please send any comments or questions to the list or if you wish to me
>> directly.
>> John
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>> John Jason Brzozowski
>> Comcast Cable
>> e) mailto:john_brzozowski@[cable.comcast.com]
>> o) 609-377-6594
>> m) 484-962-0060
>> w) [http://www.comcast6.net]
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>>=20
>>=20
>>=20
