IPv6 prefix delegation: after months of working fine, today no prefixes available

Subject says it all. After months of having a /64 prefix delegated to my home network and working pretty reliably, today the dhcpv6 client is reporting: IA_PD status code NoPrefixAvail: "No prefix available on Link 'wa-bellevue-ten04-". Suffice it to say I can't get a /64 allocated. Can someone investigate?

I am seeing the same issue, it started yesterday (16 June 2015) sometime in the afternoon. I discussed this with Comcast support today, and was told that they will not help because my cable modem is my own (I don't rent one) and they therefore have no access to my modem. I am skeptical that this is a problem with my modem, as this (a) worked in the past, and (b) iappears that the DHCPv6 packet from Comcast is denying a prefix delegation: Jun 17 12:18:05.357 PDT: IPv6 DHCP: Received ADVERTISE from FE80::21D:70FF:FECC:58E2 on FastEthernet0
Jun 17 12:18:05.357 PDT: IPv6 DHCP: detailed packet contents
Jun 17 12:18:05.357 PDT: src FE80::21D:70FF:FECC:58E2 (FastEthernet0)
Jun 17 12:18:05.357 PDT: dst FE80::216:C7FF:FE7C:BFBC (FastEthernet0)
Jun 17 12:18:05.357 PDT: type ADVERTISE(2), xid 12121931
Jun 17 12:18:05.357 PDT: option CLIENTID(1), len 10
Jun 17 12:18:05.357 PDT: 000300010014A412E3B0
Jun 17 12:18:05.357 PDT: option SERVERID(2), len 14
Jun 17 12:18:05.357 PDT: 0001000117323D5614FEB5D6E776
Jun 17 12:18:05.357 PDT: option IA-PD(25), len 71
Jun 17 12:18:05.357 PDT: IAID 0x00020001, T1 0, T2 0
Jun 17 12:18:05.357 PDT: option STATUS-CODE(13), len 55
Jun 17 12:18:05.357 PDT: status code NOPREFIX-AVAIL(6)
Jun 17 12:18:05.357 PDT: status message: No prefix available on Link 'wa-everett-ten05-link-S'
Jun 17 12:18:05.357 PDT: option PREFERENCE(7), len 1
Jun 17 12:18:05.357 PDT: preference value 0
Jun 17 12:18:05.357 PDT: option DNS-SERVERS(23), len 32
Jun 17 12:18:05.357 PDT: 2001:558:FEED::1
Jun 17 12:18:05.357 PDT: 2001:558:FEED::2 I do receive a /128 IPv6 unicast address for my router itself, and it can access the internet at large via IPv6. Comcast support did confirm that I should be receiving a /56 delegation.

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IPv6 prefix delegation: after months of working fine, today no prefixes available

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