Re: [lwip-devel] IPV6CP

[Sylvain Rochet]

Hi Art,


On Fri, Sep 14, 2012 at 04:45:54PM -0600, Art Heers wrote:
> Thanks.  I appreciate your work.  I see some other helpful functions
> in ppp-new that were missing.  Just curious, what was the original
> reason for starting ppp-new?  (It does seem more consistent with the
> rest of LWIP.)

Mainly a version bump between pppd 2.3.10 (released and ported to lwIP 
about 10 years ago) to pppd master branch. Which added EAP support, 
IPv6CP support, MSCHAP support, 10 years of bugfixes/improvements.


> Just for your information, the reason we are switching to LWIP is
> the IPV6 support.  We have it up and going over ethernet now.  Has
> the IPV6CP been tested?  We haven't tried it here yet, but hope to
> at least with our LWIP devices just connecting to each other via
> PPP.

It depends on what you mean by "been tested", the IPv6CP negotiation 
works, IPv6 packets are flowed from lwIP core to PPP, so it works for 
me.

Note that IPv6CP only negotiate randomly generated link-local addresses 
on both end of the PPP session, this is how this protocol is meant to 
be, and is not like IPCP which negotiate "globally routed" IPv4 
addresses. Therefore you have to do more wiring in order to have IPv6 
global scope addresses. I guess having a IPv6 router sending RA to the 
other PPP side should work but I havn't tested it, this is out of the 
PPP scope.


Sylvain

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