Setting up 6to4 Tunnel from Hurricane Electric on CRS125-24G-1S-2HnD-IN

Hi,

I have been eyeing Mikrotik’s products for quite some time and just got my hands on my first RouterOS device. I bought a CRS125-24G-1S-2HnD-IN and I’m using it at home as my home gateway. I’m learning about IPv6 and I’m trying to set up a 6to4 tunnel using the free tunnelbroker.net service from Hurricane Electric.

I created my tunnel on tunnelbroker.net and ran the commands that they provided for RouterOS and the additional commands from the wiki[1] to enable clients on my LAN to auto-configure their global IPv6 addresses using SLAAC.

[1] http://wiki.mikrotik.com/wiki/Manual:Hurricane_Electric_Tunnel_Broker_Example_for_Home

I have 2 Linux-based devices that I’m using for testing. A desktop with Ubuntu and a raspberry pi with Rasbian. Without any additional steps, these two devices can now ping each other using their global IPv6 addresses and this works fine. If I log into the CRS using telnet, I can ping both the local and remote ends of the IPv6 tunnel. However, I cannot ping the CRS from either of the linux-devices on the LAN nor can I ping these devices from the CRS. Furthermore, if I try to ping any other IP from the CRS, it says “no route to host” even thought I believe that I have my routes set up correctly. I’ve pasted screenshots of my configuration below:

IPv6 - Addresses

IPv6 - Neighbour Discovery - Interfaces

IPv6 - Neighbour Discovery - Prefixes

IPv6 - Neighbours

IPv6 - Routes

I’ve been scratching my head over this for a few hours now and any help would be appreciated. Please let me know if I can provide any more information.

You have same /64 subnet on both sit1 and bridge-local. It should be two different ones, look closely at what they gave you.

Thanks so much! It was obvious when you pointed it out. This is why the third block in the prefix is in bold in the TunnelBroker configuration and in the wiki (duh). I with that they called it out explicitly in the text so that people don’t make the same mistake that I did!