From: Danny Cox (dandermanuk@gmail.com)
Date: Sat Feb 17 2007 - 09:49:02 ART
hi folks
I've been looking at NAT-PT these last couple of days and am missing
a point. Let me suggest the following
R1 ----- R2 ------- R3
Connect these three routers with Ethernet links, put ipv4 addresses
on the R1-R2 link, and ipv6 addresses on the R2-R3 link
To configure NAT-PT on R2 such that R3 will respond to pings to an
ipv4 address I have to set the translations there. I'm translating
the source of R1's ethernet to an ipv6 address, the ipv6 source of
R3's ethernet to an ipv4 address, configuring 'ipv6 nat' on the R2
interfaces and a prefix on R2.
It doesn't work. Rather than simply wading through configs, I think
I'm missing a point in how this works, so want to get the theory
clear. If I run a debug on 'ip packet' on R1, I can see that
encapsulation is failing when trying to ping R3. If R2 isn't
reponding to R1's arp for R3, then that would explain this I think.
Should R2 be reponding to those arps? How should it behave on the
ipv6 side? Presumably it should be responding to a neighbour
solicitation?
So .. how should R2 behave and am I simply missing an 'ip
respond-to-arp' command ? :-)
cheers
Danny
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