IPv6通信を高速化を、ついにAtermへ実装!らしい
NECの「IPv6 High Speed」対応ファームウェア、Wi-Fiルーター3機種向けに公開ですと
この挿絵で分かる通り、なんの事はない、カプセル化って事だろう
IPv4で困っていたのは、リアルIPv4遅延
送受信に何ら遅延もなく、応答が遅いのIPv6に移行したので今現在なんだろうって感じ。

Improved IPv6 communication speed, finally implemented in Aterm! Appear
If it is released for NEC’s “IPv6 High Speed” compatible firmware and three Wi-Fi routers
As can be seen in this illustration, what of it is not, it will be like that encapsulated
What I was troubled with IPv4 was real IPv4 delay
There was no delay in sending and receiving, and since response shifted to IPv6 which is slow, I feel that it is now.
記事
https://internet.watch.impress.co.jp/docs/news/1147126.html