[324] in North American Network Operators' Group
Re: CIDR FAQ
daemon@ATHENA.MIT.EDU (Yakov Rekhter)
Thu Aug 17 14:21:02 1995
To: davids@on-ramp.ior.com (David J. Schmidt)
cc: rv@zeus.nic.dtag.de, owen@DeLong.SJ.CA.US, inet-access@earth.com,
nanog@merit.edu, local-ir@ripe.net
In-reply-to: Your message of "Thu, 17 Aug 95 08:21:00 PDT."
<m0sj6kh-000RnVC@on-ramp.ior.com>
Date: Thu, 17 Aug 95 11:03:36 PDT
From: Yakov Rekhter <yakov@cisco.com>
David,
> But isn't it possible to have a router convert from an IPv6 address
> with provider bits to an IPv4 address by simply stripping all but the
> lowest 32 bits from the IPv6 address?
>
> The hosts on the LAN remain entirely IPv4, but the addresses that
> leave the router have the provider bits added by the router.
You can't strip a non-zero part of IPv6 address, as this would cause
transport layer pseudo-header checksum to fail.
Yakov.
