AC66U tunnelbroker IPv6 tunnel hangs

mlai said:

I have several AC66U/AC68U/AC87U acting as routers for my home and offices. On an AC66U and AC87U, I have a IPv6 tunnel configured via Tunnelbroker.net. The tunnel on AC87U has been stable and just works. However, the tunnel on the AC66U will hang sporadically and stops passing IPv6 traffic.

I am at wits end. Any thoughts?

They are all on Merlin 378.55......

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TheOldMan said:

Have a looksee at https://forums.he.net/index.php?topic=2680.0 I assume you are using the he.net tunnel?

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john9527 said:

Sometimes IPv6 and NAT Acceleration don't get along together on the MIPS routers depending on your ISP. Try disabling NAT Acceleration if you have it enabled.

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TheOldMan said:

I have ipv6 with he.net. It works great. Nat or not. I originally used 6rd from centurylink. Was fed up with no 6rdns. With he.net 6rdns works. The ipv6 will hang if you don't specify the correct tunnel MTU. Mine is set for 1472. You can use "0" or "1480" I think 1472 is stable. Have you checked this out?

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sfx2000 said:

HE.net IPV6 tunnels are great - esp. if your ISP doesn't do IPv6 (hello CoxHSI, it's 2015 and still no IPv6?)

I've run into a problem a couple of times with tunnels doing exactly what you are experiencing - and the fix was to delete the tunnel config (on tunnelbroker) and on the router/AP, and start over...

hth...

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john9527 said:

Sometimes IPv6 and NAT Acceleration don't get along together on the MIPS routers depending on your ISP. Try disabling NAT Acceleration if you have it enabled.

Click to expand...