Comcast Trial IPV6 prefix delegation size.

Question

Hello,If I just attach my linux box and do dhcpv6, everything works.I'm now trying to drop in a pfsense box as a router/firewall & have requested a prefix delegation of /56 from comcast.  How do I tell if my area is enabled for this?  It doesn't seem to be working.  My linux box, of couse, gets a /64. Edit: My pfsense box gets a /64 as well but anything smaller doesn't seem to work.

NetDog_Tuska · Answer

This is on our Netgear trial gear correct?  If so that is correct the Netgear is getting the /56 and is delegating a /64 to your pfsense box.

Robstarusa · Answer

From reading these forums, I have to get someone at comcast to put my netgear comcast router into "bridge" mode so that I can get the /56 on my router/firewall instead of on the netgear itself. I've also switched from a pfsenes box to an asa 5505 (Cisco) on 9.2 code.

If this not possible & I need to wait, let me know. I have no problem with ipv6 connectivity if I hook any device directly to the netgear box itself, but am hoping to get an intermediate router/firewall working that can have 3-4 interfaces, each with a /64 and begin testing.

Best regards,

Robert

Robstarusa · Answer

My firmware was just upgraded.  I'm going to try this out tonight.

gadams999 · Answer

Rob,

Did you get a chance to try this out?

I'm still struggling with getting PD's to work at all on the trial CCR. I went as far as to install an Ubuntu VM, wide-dhcp client, and various dhcp client and radvd configs.

With the lack of information on the Netgear CD300DCR trial for IPv6, all I can do is surmize:

It gets a /56 from the CMTS or Comcast BCI DHCP servers and presents that on the LAN;
my router (Ubuntu) pulls a /64 which it allocates to my "WAN" interface;
using wide-dhcp and a prefix of ::/64 I can get it to allocate an IA_PD for my "LAN" interface;
Via radvd my LAN hosts can see the /64 and autoconf and have a defailt gateway (to the fe80:: address, but the ubuntu box does route the traffic back to the CCR via the WAN interface)
No response from the LAN originated traffic (ping6 to Google) whereas the same ping from the WAN interface does work;

Latest firmware version ont he device still has the same affect.

I think at this point it's probably best for me to procure a supported modem (Arris) that is DOCSIS 3 and IPv6 capable for my production BCI. I can live with /60's and dynamic IPv6 at this point. I reckon the regular CCR's/CCM's on production HCI will have full support soon.

Now to find out about that bridigng mode. 😉

Robstarusa

Comcast Trial IPV6 prefix delegation size.

NetDog_Tuska

Robstarusa

Robstarusa

gadams999