Reply to post: compatability

OK, this time it's for real: The last available IPv4 address block has gone

Sir Runcible Spoon Silver badge

compatability

Many companies running ipv4 routable addresses inside their network could release addresses by running IPv6 at the border and IPv4 internally. Basically turns their assigned range into a private network block. Not suitable for all, but should help migration timelines.

You append your internal v4 addresses to your v6 address block and away you go (almost).

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