MQTT Example - Radvd not disseminating an address?

RE: MQTT Example - Radvd not disseminating an address?

MartinBL — Fri, 15 Jun 2018 09:01:29 GMT

Can you verify that you have set a global prefix on bt0? We usually add 2001:db8::1 to the bt0 interface before kicking the radvd restart.

ifconfig bt0 add 2001:db8::1/64

Link: http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fiot_sdk_user_guides_linux_commands.html&cp=4_0_0_5_4_0_5_4&anchor=iot_sdk_user_guides_linux_commands_ifconfig

RE: MQTT Example - Radvd not disseminating an address?

Mateusz — Wed, 13 Jun 2018 12:47:10 GMT

Thanks, MartinBL. Forwarding is on. bt0 does not have a global prefix. I want to forward all packets from / to bt0 to the teredo interface, which is IPv6.

I debugged it further and it looks like things are failing in icmp6_input() in lwIP. Somehow checksums are not calculated properly. If I set CHECKSUM_CHECK_ICMP6 to 0, the stack gets a global IPv6 address assigned, and I can see packets come through the teredo interface.

RE: MQTT Example - Radvd not disseminating an address?

MartinBL — Wed, 13 Jun 2018 10:56:33 GMT

Hi,

Can you check if ipv6 forwarding is enabled with

echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

and then restart radvd with

sudo service radvd restart

Can you also check whether the bt0 interface gets a global prefix? https://devzone.nordicsemi.com/f/nordic-q-a/8972/fail-to-ping-iot-device-s-global-ipv6-address/33023#33023