[Babel-users] Send: Cannot assign requested address

[Juliusz Chroboczek]

> These same steps are repeated on Pi number 2, but with an ipv4 address of
> 10.0.2.1. At this point both of them can ping each other at their ipv4 address
> via the wlan1 interface.
> 
> Attempting to run babeld on wlan1 will result in an error regarding a lack of
> link-local address. The specific message is:
>     Interface wlan1 has no link-local address.
>     setsockopt(IPV6_LEAVE_GROUP): Cannot assign requested address

Weird.  Linux should assign a link-local address shortly after the link is
established.

>     sudo ip -6 addr add $(generate-ipv6-address fe80::) dev wlan1

That shouldn't harm, babeld should sort things out if even there are
multiple link-local addresses.

> send: Cannot assign requested address

That's bad.

Could you please try

  ping ff02::1%wlan1

and

  ping ff02::whatever

where "ff02::whatever" is the link-local address you assigned to the other
node?

-- Juliusz