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Author Topic: OpenBSD tunnel keeps losing connectivity  (Read 1965 times)

mattschwartz01

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OpenBSD tunnel keeps losing connectivity
« on: July 01, 2019, 08:10:34 AM »
Greetings fellow IPv6ers! I am having a bit of a problem with my OpenBSD 6.5 gif0 tunnel. The tunnel keeps going down and I have to ping to bring it back up. It shows up in an ifconfig command. I even manually set the mtu to 1480 to match HE's settings. Any idea what could be happening?
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broquea

  • Sr. Network Engineer, HE.NET AS6939
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Re: OpenBSD tunnel keeps losing connectivity
« Reply #1 on: July 01, 2019, 07:38:47 PM »
Behind NAT/firewall? Sounds like conntrack issues. Tune them or set up an IPv6 keepalive, like NTP queries.
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