gnrc/ipv6/nib: fix 6Lo ND options on non 6Lo interface #19604
Merged
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Contribution description
We have put a Raspberry Pi behind a 6Lo network and discovered that the 6Lo router includes the 6Lo ND options in router advertisements over the non sixlowpan interface to the Pi.
This behaviour is probably not useful/intended. So we check if the interface over which the RA is sent, is a 6Lo interface before the 6Lo ND options are appended.
Testing procedure
Our setup is Raspi --> 6LBR --> 6LR --> Raspi
Issues/PRs references
alternative to #17594