5 ms·
When you have millions of customers, you start running into the limits of private IPv4 address space. Before deploying IPv6, T-Mobile was using 25.0.0.0/8 (ass
by p1mrx 11y ago
When you have millions of customers, you start running into the limits of private IPv4 address space. Before deploying IPv6, T-Mobile was using 25.0.0.0/8 (assigned to the UK Ministry of Defence) for the internal side of their IPv4 NAT.
- api 11y agoBogarting unadvertised IPv4 space is common. A lot of people don't understand that it's not just public IP space that is in short supply in IPv4. IPv4 also has inadequate space to number large private networks in a non-conflicting manner. Causes all kinds of crazy headaches with VPNs and distributed networks too... try linking two sites that both use 10.0.0.0/16 sometime. It's hell.
- fulafel 11y agoT-Mobile already has many millions of real routable IPv4 addresses, so it's not like they would have to put everybody behind a single NAT.