[riot-notifications] [RIOT-OS/RIOT] 6LoWPAN over BLE: Device not pingable (#11147)

Philipp notifications at github.com
Fri Mar 8 21:58:39 CET 2019

#### Description
I am not able to ping my device with 6LoWPAN on BLE from my linux machine.
Possible issue: As @miri64 [mentioned in an issue](https://github.com/RIOT-OS/RIOT/pull/11067#issuecomment-470487587), the header compression might be the issue. So, I added ```USEMODULE += gnrc_sixlowpan_iphc``` to my Makefile. 

#### Steps to reproduce the issue
1. Since [gnrc networking with BLE does not work](https://github.com/RIOT-OS/RIOT/issues/11091) at the moment. You need to checkout the commit 60008cbb2e6afbf3a39116192fcac02b5454e87b. 
2. Flash the gnrc_networking example
3. Follow the [6LoWPAN BLE guide](https://github.com/RIOT-OS/RIOT/blob/master/pkg/nordic_softdevice_ble/README-BLE-6LoWPAN.md)
4. The ping ```ping6 [DEVICE_LOCAL_ADDRESS]%bt0``` responds with address unreachable.
In my case:
```From fe80::1a:7dff:feda:7113%bt0 icmp_seq=1 Destination unreachable: Address unreachable```

#### Expected results
Device to be pinagble.

#### Actual results
The device doesn't respond on pings. 

#### Versions
Installed compiler toolchains 
             native gcc: gcc (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0
      arm-none-eabi-gcc: arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2018-q2-update) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]
                avr-gcc: missing
       mips-mti-elf-gcc: missing
             msp430-gcc: missing
   riscv-none-embed-gcc: missing
                  clang: missing

Installed compiler libs
   arm-none-eabi-newlib: "3.0.0"
    mips-mti-elf-newlib: missing
riscv-none-embed-newlib: missing
               avr-libc: missing (missing)

Installed development tools
                  cmake: cmake version 3.13.3
               cppcheck: missing
                doxygen: missing
                 flake8: missing
                    git: git version 2.17.1
             coccinelle: missing

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