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Strategy for CGN and Docsis CMTS?

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fschlums
Strategy for CGN and Docsis CMTS?

Some of the InternetServiceProvider are tending to run out of public IPv4 addresses. So they switched there low budget accounts from public IPv4 to private IPv4. But this requires a Carrier Grade NAT machine. These routers seem to be rather big and expensive. So is there a way for smaller ISP?
Does anybody now a usful page to read into the topic? Someone realized it for docsis users?
Thank you.

wittmann
For a small MSO I would

For a small MSO I would definitely check on AFTR / DS-Lite from ISC.org:

https://www.isc.org/downloads/aftr/
https://www.isc.org/downloads/lwds-lite/

Maybe another solution will be a NAT with https://tools.ietf.org/html/rfc6598 RFC6598 with the IPv4 scope of 100.64.0.0/10. But this IPv4 Scope should just used if at the same time IPv6 will be offered to the customer.

fschlums
Hello wittmann

Hello wittmann
thanks a lot for your answer. As I understood the cable cpe needs to support ds-lite. You ever heard the Cisco EPC3925 could make it?
I would save IPv4 addresses at low budget contracts. But what if these users only have bridgemodems?
A question about a cable gateway with private IPv4 address. How would I tell the cable router sending its IPv4 traffic to the AFTR? Is there something similar like the gateway option for ds-lite?

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