Subject: Re: IPv4 and IPv6
To: Gandhi woulda smacked you <email@example.com>
From: None <firstname.lastname@example.org>
Date: 07/05/1999 10:08:47
>Is it possible to run IPv4 out one port and IPv6 out the other?
IPv4 and IPv6 are separate protocol (like IPv4 and Appletalk)
on the wire. They have separate ethernet protocol type number.
Therefore, you can run:
- IPv4 and IPv6 on the same wire
- IPv4 on one interface, and IPv6 on another
One thing you cannot do is, communicate directly from IPv6-only
host to IPv4-only host. There are two answer to this:
- IPv6-capable hosts must also be IPv4-capable, for early deployment
stage. Therefore, the dual-stack node can use IPv4 when communicating
with IPv4-only host.
- You can have NAT-like translator, or web proxy kind of thing
inbetween. Application proxy works just fine for web proxy
and SMTP (sendmail capable of IPv4/v6 will be able to relay your
Am I answering your question?