Re: [lwip-users] Router log not showing IPV6 hostname and ip generated in stm32

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Meera wrote:
> I have established communication between tcp client and server via IPv6 , for
> that ipv6 ip generated in stm32 board. That is working alright , but the
> problem is, IPv6 ip is not there in router's log, ipv4 ip i there. see below
> screenshots.
>
> <http://lwip.100.n7.nabble.com/file/t1982/ipv4.png>
>
> But ipv6 is not in the list.

I don't know if it is lwIP's duty to show up there. Are you even seeing 
other devices' IPv6 address there?

When using IPv6, I suppose you do know the difference between dhcp 
(IPv4) and SLAAC.
We do not support DHCPv6, yet, so that might be a difference to other 
IPv6 devices. However, this is not used as often as SLAAC and certainly 
is not required to get a routable address.

> Also here is the log of gnetif for lwip communication of stm32.
> <http://lwip.100.n7.nabble.com/file/t1982/ipv6.ipv6>
>
> With the above image you can see clearly that I can communicate via IPv6 ,
> but  I am not getting ip6_addr[2] which is empty.

What would you expect to get there? [0] is reserved for a link-local 
address but all other slots are for autoconfig addresses. One should be 
enough ([1] in your case).

What is it exactly that's not working for you? Is this only a question 
of "where can I find the address of my device"?


Simon