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Comcast and Time Warner Cable Show Dramatic Increases in IPv6 Deployment
- mey 13y agoSource Article http://www.worldipv6launch.org/measurements-update-cable-ops-roll-it-out/ http://www.worldipv6launch.org/measurements-update-cable-ops...
- 2bluesc 13y agoI run native IPv6 at home in San Francisco on Comcast. It just works after some screwing around. Every now and then I'll notice that my web browser selects the AAAA record for google.com, facebook.com or something else. It'd be nice if they gave out a proper prefix delegation. Instead the best I can get allocated is a /60. Pretty sure the RFC recommends /48's to be allocated to customers.
- agwa 13y ago> It'd be nice if they gave out a proper prefix delegation. Instead the best I can get allocated is a /60. Pretty sure the RFC recommends /48's to be allocated to customers. Out of curiosity, what's your use case for more than 16 subnets? I agree on principle they should give you a /48 if you ask for it, but the truth is that I'm extremely grateful they rethought their original stance, which was that a measly /64 was enough for anyone! That would have been extremely harmful and short-sighted; I feel pretty comfortable with a /60. On that note, does anyone know what Time Warner's maximum prefix delegation size is?
- oofabz 13y agoI have been perfectly happy with my /64 for many years. I can't imagine needing multiple subnets for home or small office use.
- agwa 13y agoI think the most compelling use case is a separate guest network (which is firewalled from your normal network; some wireless access points tout this as a feature). Power users might also run a VPN and allocate a subnet to VPN clients. There are also home automation standards that put all your devices on a separate subnet.
- 2bluesc 13y agoI think the single most compelling use case is to segment WiFi and Ethernet traffic. No point in broadcasting useless Ethernet ARPs to the WiFi network when bridged for example.
- simcop2387 13y agoI can see use for maybe about 4, not sure about more, but if I recall correctly the privacy extensions require a /48 don't they?
- agwa 13y agoNo, the privacy extensions simply use a random interface ID instead of deriving it from the MAC address. You still use a single /64 subnet as usual. (Unless there is an aspect of the privacy extensions I'm not familiar with, but this is what people usually mean when they say "privacy extensions.")
- zaphoyd 13y agoAs far as I know the privacy extensions only cycle through the host portion of the address (lower 64 bits) so they should work fine with just a /64. Access to a bigger prefix may help you get around systems that do IP banning in /64 chunks though.
- 2bluesc 13y agoI have several subnets (WiFi, LAN, virtual machines, guest WiFi, etc). I don't just bridge WiFi and LAN together like most, I prefer more control. I'll fine with 16 subnets today, but I don't know what'll change in the future. I'm sure I'll have use cases for more.
- p1mrx 13y ago> Every now and then I'll notice that my web browser selects the AAAA record for ... By what method are you noticing that? I made this extension for Chrome that displays a "4" or "6" in the address bar: https://ipvfoo.googlecode.com/ https://ipvfoo.googlecode.com/ Here's a similar extension for Firefox: https://addons.mozilla.org/en-us/firefox/addon/sixornot/ https://addons.mozilla.org/en-us/firefox/addon/sixornot/ Sadly, Hacker News is still stuck on "4".
- storborg 13y agoI just activated a new Comcast connection in Portland. Ironically, IPv6 "just works" totally out of the box, but IPv4 does not.
- zaphoyd 13y agoA friend of mine had a similar "issue". He had a modem too new to be on Comcast's approved list so they refused to register it. After plugging it in anyways, IPv4 was filtered to a Comcast captive portal with modem registration instructions but IPv6 stuff worked fine... whoops.
- p1mrx 13y agoFascinating, does that mean you can plug a random DOCSIS 3.0 modem into any Comcast port, and get free IPv6 access? That's an effective way to encourage deployment, but I'm sure they'll fix the bug if they haven't already :-)
- wmf 13y agoJust like all the places that are only firewalling IPv4 (I blame the iptables/ip6tables split).
- derefr 13y ago> Ironically, IPv6 "just works" totally out of the box, but IPv4 does not. Not very ironic at all. IPv6's autoconfiguration (through link-local addresses, the Neighbor-Discovery Protocol, etc.) comes from engineers with decades of experience (and frustration) in managing ISP-sized netblocks.
- ianburrell 13y agoRFC 3177 suggested /48 for customer networks but RFC 6177 allows shorter delegations. /56 and /60 are common allocations for ISPs. /60 should be plenty for residential customer especially if larger allocations are available for business customers.
- zurn 13y agoWow, sounds pretty incredible that they're giving out substandard prefixes, given the whole point of IPv6... So right from the start, consumer/small business IPv6 gear won't be able to build on having more than a /64 for themselves (to subdelegate for things like home automation networks, virtualization, etc). Oh well, I guess those things will need to support IPv6 NAT!
- deathanatos 13y agoI'll remain pessimistic for the time being. IPv6 has been coming my entire life. I'm a Comcast Business class customer in Silicon Valley, and I recently (few months ago, a little after IPv6 day) asked about IPv6 support. "Not currently" was the answer, so it's a little surprising to see a HN article about "Comcast [shows] Dramatic Increases in IPv6 deployment". If the article's graph is to be believed (and I don't see why not), then I'm curious as to where they're deploying it. I partially wish the graph's Y axis was [0, 100%], to show how far they have yet to go. If Time Warner continues deployment at current rates, it looks to take them ~15 years to complete. That's assuming that the growth is linear, and only using the last ~6 months. (Since it seems they only just started.) Hopefully, growth will initially be exponential, and this won't take quite that long (I expect some sort of S-curve[1]). [1]: http://en.wikipedia.org/wiki/Diffusion_of_innovations http://en.wikipedia.org/wiki/Diffusion_of_innovations
- wmf 13y agoISPs are doing consumer IPv6 first because consumer has no SLAs. The process definitely isn't linear; it generally consists of badgering the CMTS vendor until they release working firmware (which takes 2-5 years) and then deploying that firmware to millions of customers en masse. Since each ISP uses a small number of CMTS models, we should expect to see large jumps with plateaus in between. Also, I think these graphs are measuring not just customers who have IPv6 available but how many are actually using IPv6. There are millions of customers who have IPv6 but their router or OS doesn't support it; this will probably phase out over 5-10 years.
- zaphoyd 13y agoEveryone I know in Chicago with residential Comcast service (including myself) has had native IPv6 deployed since ~June 2012. Based on information from http://www.comcast6.net http://www.comcast6.net it looks like Comcast lit up IPv6 for residential customers first and is now conducting trials with their business customers.
- jcastro 13y agoI don't have a link handy but I've read in multiple places that Comcast will be doing ipv6 for consumer class first and then deploy business class. (Same boat as you, business class with no ipv6)
- MrFoof 13y agoComcast had real incentive to push IPv6 hard in some markets -- their address plane was out of addresses to satisfy DHCP leases in some markets. When you get support calls in a market, and the reason is because they can't be given an IP address, it lights a fire under you. Needless to say, I've had IPv6 with spot-on 6-to-4 support in Boston for over a year now.
- wmf 13y agoIPv4 addresses are still available for free in North America.
- kbar13 13y agoare they still doing that jank-ass "1 ip per household" bs? pls2be /64 thanks!
- agwa 13y ago> are they still doing that jank-ass "1 ip per household" bs? pls2be /64 thanks! If you're asking whether Comcast is still limiting people to a /64, the answer is no. They now allow you to request up to a /60 with DHCPv6-PD. I'm not sure about Time Warner.
- X-Istence 13y agoComcast gives you a /128 for your gateway device. They will also give you a /64 over DHCPv6 for SLAAC. (although some people are reporting that they can get /60's, I've been able to get up to two /64's without issues myself).