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I have Comcast cable service in Chicago. I have an SB6120 modem and an Airport Extreme base station. I didn't do anything special beyond plug it in. The Airpor

by zaphoyd 13y ago

I have Comcast cable service in Chicago. I have an SB6120 modem and an Airport Extreme base station. I didn't do anything special beyond plug it in. The Airport Base has an IPv6 page that shows what the delegated /64 subnet is. All the devices on my network have autoconfigured themselves with addresses in that range. I appear to be able to manually set hosts to any address in that range as well and it seems to work fine. I do this on some of my server VMs because otherwise they generate a new random address every few days (privacy mode woo). The privacy addressing makes assigning a DNS name to said VM more difficult. I've had the same /64 delegated to me since June 2012. I've heard that you can request a /60 prefix (16 subnets) if your router supports IPv6 Prefix Delegation (pretty sure the Apple one doesn't). I don't know exactly how you go about doing that though. I'd probably start with the HSI forums on dslreports.com

apaprocki 13y ago
See, I have exactly the same setup (SB6xxx + AE) and on TWC in NYC it just doesn't work. The AE gets an IPv6 address from the modem, but TWC isn't assigning it a prefix, so all IPv6 devices behind the AE just sit there twiddling their digital thumbs.
- zaphoyd 13y ago
  TWC is definitely not as far along in their deployment. It might just take some more time. =\ Edit: If I recall correctly, when Comcast was doing their initial deployment they started with end nodes only (not delegating prefixes). Then moved to delegated /64s. Now are moving on to delegated /60s and more.
- simon_vetter 13y ago
  Some older AE/TC don't support DHCP-PD even if you update them with the latest firmware (that's really a shame IMHO). It might also just be your AE settings. Check that it is configured in router mode, with access mode set to native or automatic. http://www.dslreports.com/forum/r27251137-IPv6-Time-Capsule-AEBS-does-not-pull-IPv6-Address http://www.dslreports.com/forum/r27251137-IPv6-Time-Capsule-...
toomuchtodo 13y ago
I'm in Schaumburg, and have had the same experience, but with a Linksys E3200 access point. Plugged into Motorola Comcast modem, and dual-stack came right up.
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by zaphoyd 13y ago

apaprocki 13y ago

See, I have exactly the same setup (SB6xxx + AE) and on TWC in NYC it just doesn't work. The AE gets an IPv6 address from the modem, but TWC isn't assigning it a prefix, so all IPv6 devices behind the AE just sit there twiddling their digital thumbs.

zaphoyd 13y ago
TWC is definitely not as far along in their deployment. It might just take some more time. =\ Edit: If I recall correctly, when Comcast was doing their initial deployment they started with end nodes only (not delegating prefixes). Then moved to delegated /64s. Now are moving on to delegated /60s and more.
simon_vetter 13y ago
Some older AE/TC don't support DHCP-PD even if you update them with the latest firmware (that's really a shame IMHO). It might also just be your AE settings. Check that it is configured in router mode, with access mode set to native or automatic. http://www.dslreports.com/forum/r27251137-IPv6-Time-Capsule-AEBS-does-not-pull-IPv6-Address http://www.dslreports.com/forum/r27251137-IPv6-Time-Capsule-...

toomuchtodo 13y ago

I'm in Schaumburg, and have had the same experience, but with a Linksys E3200 access point. Plugged into Motorola Comcast modem, and dual-stack came right up.

deleted 13y ago

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