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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Microsoft and Teredo
Hi Sean, Most of the access providers, can't quickly move to dual-stack. It may be a problem of existing equipment or even L2 technology (as the cable/DOCSIS 2.0 case). The bigger issue is upgrading the CPEs. Lack of plans in the last years, didn't helped the low cost vendors to deliver them with dual-stack. Yes, there are open source alternatives, but they don't work so easily for all, as not all the users are able to do that upgrade, and otherwise it may mean a hard support cost. Obviously this will be challenged by those ISPs that want to start providing new services based on IPv6 (surveillance, home automation, IPTV, etc.). So having a CPE typically means either the user has a single PC and the CPE may be configured as bridge and then the user PC has the public IPv4 address (case for 6to4), or the user PCs are behind NAT (caser for Teredo). The alternative will be softwires (L2TP), but is not yet fully supported (I'm not even sure if Vista support it form Microsoft, for XP I think not yet). So providing a combination of 6to4 relay and Teredo server+relay, is a simple way to offer IPv6 connectivity at a very low cost and improve performance vs. using relays somewhere else. Of course, this will be more obvious as more applications use IPv6, and in fact, my suggestion will be, once we have some more relays across all Internet, that XP and Vista get one of those updated changing the setup of the address selection table, so Teredo and 6to4 become preferred to IPv4 :-) In fact, it will be quite easy to, at boot time, do a quick test (ICMPv6 + ICMPv4) of the "availability" of a good relay, to decide if the policy table prefers by default Teredo/6to4 instead of IPv4. Of course all this is assuming that you can't provide native IPv6 ! Also one very important issue will be to make sure that Windows 2003 (which runs lots of websites with IIS), is updated with Teredo Server/Relay function or at least that Teredo host-specific relay functionality works by default. Regards, Jordi PS: What it will be good is to get at least some of the MS servers dual-stacked :-) and you know, if help is needed, I don't mind to spare some time for that ! > De: Sean Siler <[email protected]> > Responder a: <[email protected]> > Fecha: Thu, 31 May 2007 04:27:53 -0700 > Para: Nathan Ward <[email protected]>, Nanog <[email protected]> > Conversación: Microsoft and Teredo > Asunto: RE: Microsoft and Teredo > > > Nathan, > > While these are really good questions, I'm afraid I don't have really good > answers to them yet. We haven't made the bits available for customers to > install their own Teredo Servers/Relays at this point, and because we haven't, > we also don't have good deployment guidance to go along with that. > > I have my own feelings, but let me ask this: what do you all feel about > installing a Teredo server in order to provide v6 connectivity to your > clients? Is this something that you are really interested in? > > You feedback is welcome. > > > > Sean Siler|IPv6 Program Manager|Microsoft > [email protected] | 703.485.1170 > http://blogs.technet.com/ipv6 > IPv6 is ready. Are you? > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Nathan > Ward > Sent: Wednesday, May 30, 2007 6:44 PM > To: Nanog > Subject: Re: Microsoft and Teredo > > > On 31/05/2007, at 5:40 AM, Sean Siler wrote: >> I understand some questions recently arose regarding Microsoft and >> Teredo. I tried reading through the archives but it has more twists >> that Pacific Coast Highway. >> >> >> >> Are there some specific requests/questions that I can help with? > Probably, yeah. > > From another post my Michael Dillon: > >> Since we are all collectively playing catchup at this point, it >> would be >> very useful for some clear guidance on who needs to deploy Teredo and >> 6to4 and where it needs to be deployed. Also, the benefits of >> deployment >> versus the problems caused by not having it. Should this be in >> every PoP >> or just somewhere on your network? Are there things that can be >> measured >> to tell you whether or not lack of Teredo/6to4 is causing user >> problems? > > Maybe you can provide operational experience from running the Teredo > servers and relays that Microsoft host? Do you host them just at > Microsoft or do you also have some inside ISPs? Have you done any > work to help/advise on deploying Teredo servers/relays in to ISPs? > Any learnings from that that you can share? What about corporate > networks? > That oughta get you started :-) > > -- > Nathan Ward ********************************************** The IPv6 Portal: http://www.ipv6tf.org Bye 6Bone. Hi, IPv6 ! http://www.ipv6day.org This electronic message contains information which may be privileged or confidential. The information is intended to be for the use of the individual(s) named above. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, including attached files, is prohibited.
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