Re: [lwip-users] lwip IPV6 PPP only get link local address and cannot connect to server

[Jiang Peng]

Hi Sylvain,

thanks for the reply.

Today I tried the latest LwIP 2.1.3.  I enabled LWIP_IPV6_DHCP6, LWIP_IPV6 build option.

I see nd6_send_rs get called, but still cannot get the IPV6 unicast IP address from my ISP, only get LL address.

Any suggestions are really appreciated.

thanks

Ivan

ppposif UTILS:   our6_ipaddr = FE80::30D4:A3ED:2943:32DC
local  LL address fe80::30d4:a3ed:2943:32dc
remote LL address fe80::b566:fac9:ff61:a117

On Fri, 12 Nov 2021 at 00:27, Sylvain Rochet <gradator@gradator.net> wrote:

Hi,

On Thu, Nov 11, 2021 at 10:40:09AM +1100, Jiang Peng wrote:
> Hi everyone,
> I have a project that is running LwIP V2.1.2. The stack is LwIP on top of
> BG96 cellular modem.
> It works fine for IPV4, but when I enable IPV6, I only get IPV6 link local
> address, and cannot get real IPV6 address, therefore, I cannot connect to
> my server.
> The LwIP comes from ST cellular expansion package.
> I enable the log, and it got local and remote LL address, but after that
> never got any real address, and cannot connect to my server.
> thanks a lot for any hints or suggestions.

This is normal. You need to run IPv6 NDP, DHCPv6 or static
configuration, depending on what your peer is using, over the PPP link.

Sylvain
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Jiang Peng