said by NetDog: said by NetFixer:
Enabling the IPv6 firewall is the only thing that changed on my side. The rest of the DIR655's IPv6 setup is the same, and the firmware is the same. Fortunately, I don't need (and wasn't depending on) the /60 assignment; but if I had been using it, I would have been pissed that something as simple (and normal) as enabling the IPv6 firewall would cause such a major change in my IPv6 addressing.
This is not a Comcast issue but a router issue, if your router doesn't support more then one LAN or network behind the WAN why would you need more then one /64?
My home router is a 3845, I have 5 LAN's off of it so yes I would request a /61 so I can enabled all my LAN's for native IPv6.
So the next question is why would I ask for a /60 (16 networks) when I don't need a /60 but a /61 (8 networks). This is just me but I would only ask for that I need..
/60 (16 Network)
/61 (8 Network)
/62 (4 Network)
/63 (2 Network)
/64 (1 Network)
It would seem to me to be a Comcast issue when the router does support multiple IPv6 networks (I previously tested with my guest network behind it), and it used to get the /60 allocation but now it does not get it.
Comcast definitely used to supply the requested /60, but that suddenly stopped, and that is illustrated in the screen shots I previously posted. It is perhaps a total coincidence, but it happened after /60 vs /64 allocations were initially discussed in this forum in which I posted that I was getting a /60 assignment.
I had initially thought that perhaps enabling the IPv6 firewall in the router had caused this change, but I have since temporarily disabled the IPv6 firewall and rebooted the router, but I still only got the /64.
wasn't explicitly requesting a /60 allocation, the router was just getting it by default (I only have the option to enable/disable DHCP-PD). I don't currently need it (since I have a business class "c05" config file, my guest network can have its own totally isolated IPv4 and /64 IPv6 network), but I just thought that it was interesting that I used to automatically get the /60 allocation, but suddenly that stopped (for no reason that is apparent to me).--
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