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09-14-2013 10:23 PM
First off I'd like to confirm that I should be able to get a /60 or /56 via DHCP-PD on my CMTS.
PM me your CM-MAC I and I will confirm you should have access to a /60.. Only two provisioning areas do not have the /60 option and only a /64 but that should be taken care of shortly.
However I don't seem to get a GUA IPv6 address on my WAN interface. I just have a link local fe80:: address facing Comcast. As I understand it I should be able to get GUA address on my WAN interface too. Is it part of the same DHCP request as I used for prefix delegation?
Yes when the request is sent to DHCP your router should be requesting a v6 Address and a PD. Sounds like your router OS is not working correctly
I'm not able to configure a separate instance of DHCP on my WAN interface.
This should be apart of the first request, you shouldnt need to request for more then 1 IP and Scope.
No need for the screen shots right now, I dont have your router so I can confirm if it works or not.
09-15-2013 03:37 PM
I just looked at your modem, right now I only see your link-local address... You will not have access to a /60 yet, but give me about a month and it should be turned up. Feel free to PM asking about it..
I would set your IA_PD now to /60 so when it is enabled you will just receive it..
09-16-2013 11:21 AM
I'll look forward to a /60 next month.
In the meantime - The WAN IPv6 address is a mystery. I'm looking over a pcap of the DHCP transaction between my router and Comcast. I'm not sure what a working implementation is supposed to look like. Do you have any examples?
09-16-2013 11:49 AM
10-10-2013 03:46 PM
I'm told a /60 is available everywhere now. I believe I have configured my router correctly. However I still receive a /64. I have pcaps of the DHCP transaction. Is there something I should look for to see if my router is sending the correct DHCP request to Comcast?
You need to do a full release and renew to get the DHCPv6 server to assign you a new block.
10-10-2013 03:48 PM
10-10-2013 04:15 PM
I believe I've tried that several times. I still seem to only get a /64 in response. I won't discount buggy software on the router though. Are you able to confirm whether my router is even requesting a /60?
I will check the logs and see what we can see.. Can you sniffer the traffic on your side?
10-10-2013 04:29 PM
The newer versions of ROS have a prefix-hint option for the /ipv6 dhcp-client (command line option only as of version 6.6) that will allow prefix hints to be sent.
11-15-2013 12:35 PM
Thanks _biomesh_. Are you able to post an example of how to set the prefix hint in ROS?
11-15-2013 06:17 PM
/ipv6 dhcp-client add add-default-route=yes interface=external pool-name=comcast6_ipv6 prefix-hint=::/60 use-peer-dns=no
11-19-2013 10:19 PM
I'm having similar issues, but my contact at comcast (through email) has gone silent. Did the prefix hint work? Did you ever get this working?
11-24-2013 08:33 PM
Yes. Upgradding the router to ROS 6.6 and adding the hint worked perfectly. I now get assigned a /60 and have 4 subnets running with IPv6 addresses. Turned down everything with HE and am happily running native v6.
11-25-2013 11:03 AM
12-14-2013 07:55 PM
12-14-2013 08:09 PM
12-16-2013 09:20 PM
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