We have 10,000+ customers and by default everyone is behind CGNAT. Around 25 customers have asked for a dedicated public IP address and we usually just give them one free of charge. For our case, very low percentage actually request one. Travis From: NANOG <nanog-bounces+tgarrison=netviscom.com@nanog.org> On Behalf Of Eric Kuhnke Sent: Sunday, November 21, 2021 6:18 PM To: nanog@nanog.org list <nanog@nanog.org> Subject: Quantifying the customer support and impact of cgnat for residential ipv4 Looking for anecdotal examples of the following: If you put N number of individual DHCP client residential broadband customers behind cgnat for ipv4, what percent of customers contact support and become a support/troubleshooting case later. And what percent of customers have a significant problem with it, to the extent that they either need to be offered a $5-10/mo extra /32 dedicated real address, or possibly cancel? Hopefully on sample sizes of 5000 or more. All else assuming that the customers are also dual stack v4/v6 and can reach v6 things normally without any of that traffic going through the cgnat.

I have >50,000 subscribers behind CGNat. I would have to find out from the assigners group, the rate at which static/public IP address sales increased during our CGNat deployment over the last few years. I do understand that we had an up-tick in public IP sales, but unsure of the rate at which it occurred… actually I may have to get in contact with the sales group for a question like that. About problems (BTW, we use Juniper MX platform with service mic/mpc) … we had some significant issues initially… but things like… * Tuning the IGP to route to the closest CGNat boundary node, consistently * AMS interface source-ip load balancing * APP * EIM * EIF …help greatly in fixing issue with authentication on websites (webmail, banking) and also, vpn issues, and issues with gaming consoles, were largely resolved with those aforementioned enhancements -Aaron