Description

After resetting the network interface more than once, a node is not able to receive packets anymore.

Steps to reproduce the issue

Flash examples/gnrc_networking on two nodes A and B. Ping from node A to B via
ping6 <node B link-local IPv6 address> .
Reset the network interface on node A via
ifconfig 7 set state reset.
Ping should still work. Reset the network interface of node A again. Ping fails.

Please also follow observations in #9616.

Expected results

Ping should always work no matter how often we reset the network interface.

Related PRs/issues

#8118, #9616

Versions

Operating system: Ubuntu 18.04
Build environment: Docker