4 ms·

>Do you actually own that /48? In my experience the ISP generally fixes a /64 for each customer. So if in the future you change your ISP, you might want to kee

>Do you actually own that /48? In my experience the ISP generally fixes a /64 for each customer. So if in the future you change your ISP, you might want to keep the remaining addresses same while just using a script to replace the preceding /64 address.

jcalvinowens 6mo ago
Typically it's similar to ipv4, they try to assign the same address/prefix for the same MAC/DUID. The most common reason to lose your addresses is replacing your router. Hopefully new routers allow you to set the dhcpv6 DUID somehow...
- compounding_it 6mo ago
  I haven't experienced this. For me it's statically assigned but my guess is that the PON serial and/or MAC is being used or the customer ID. I think the ISPs have gotten very automated these days and everything seems to be some sort of SDN. It saves lot of labour hours in troubleshooting like customer forgetting their wifi passwords to their routers.
  - jcalvinowens 6mo ago
    Interesting. Honestly I like having control over it, that would annoy me. I deliberately change the DUID in dhcpcd to force my public addresses to change every so often.
kccqzy 6mo ago
My ISPs change the /64 more often. So I use the ULA a lot more often. My router runs its own DNS server and then it advertises this DNS server using a ULA address.
- miyuru 6mo ago
  I have mentioned this elsewhere, but ISPs should make BYOIPv6 more common, not just to the Business customers. Their are people like OP who do this via a VPS provider that supports BYOIP and then tunnel to the VPS network, so there is a demand. https://news.ycombinator.com/item?id=47355038 https://news.ycombinator.com/item?id=47355038
  - jcalvinowens 6mo ago
    I've never heard of an end user ISP that would announce and route a customer owned block of addresses. They'll all give you a static allocation, but it will be in their block. Maybe if you were a huge customer they could do it... but I can't believe they would go to that much trouble for the measly <$100/month they get from me. Also, I very much don't want all my outbound internet traffic to come from a permanent address range I am publicly known to own. I'd still want an ephemeral /56 for outbound traffic that changed from time to time.

jcalvinowens 6mo ago

Typically it's similar to ipv4, they try to assign the same address/prefix for the same MAC/DUID. The most common reason to lose your addresses is replacing your router. Hopefully new routers allow you to set the dhcpv6 DUID somehow...

compounding_it 6mo ago
I haven't experienced this. For me it's statically assigned but my guess is that the PON serial and/or MAC is being used or the customer ID. I think the ISPs have gotten very automated these days and everything seems to be some sort of SDN. It saves lot of labour hours in troubleshooting like customer forgetting their wifi passwords to their routers.
- jcalvinowens 6mo ago
  Interesting. Honestly I like having control over it, that would annoy me. I deliberately change the DUID in dhcpcd to force my public addresses to change every so often.

kccqzy 6mo ago

My ISPs change the /64 more often. So I use the ULA a lot more often. My router runs its own DNS server and then it advertises this DNS server using a ULA address.

miyuru 6mo ago
I have mentioned this elsewhere, but ISPs should make BYOIPv6 more common, not just to the Business customers. Their are people like OP who do this via a VPS provider that supports BYOIP and then tunnel to the VPS network, so there is a demand. https://news.ycombinator.com/item?id=47355038 https://news.ycombinator.com/item?id=47355038
- jcalvinowens 6mo ago
  I've never heard of an end user ISP that would announce and route a customer owned block of addresses. They'll all give you a static allocation, but it will be in their block. Maybe if you were a huge customer they could do it... but I can't believe they would go to that much trouble for the measly <$100/month they get from me. Also, I very much don't want all my outbound internet traffic to come from a permanent address range I am publicly known to own. I'd still want an ephemeral /56 for outbound traffic that changed from time to time.