[asterisk-users] Suddenly getting lots of "Unable to send packet: Address Family mismatch between source/destination" but ONLY on 1 of 2 VPSs in same datacentre.

[Jonathan H]

I resolved it when I read this:
http://asterisk-support.ru/question/61578/asterisk-v13-unable-to-send-packet-address-family/
and then followed this https://community.rackspace.com/products/f/25/t/5110
to explicitly prefer IPv4 over IPv6.

What I don't understand is that while Ubuntu has IPv6 of course, the VPS
host is set to V6 disabled. and as far as I am aware, and my ITSP doesn't
have IPv6, so I just can't figure out why two IPv4 systems are getting IPv6
"pollution" as it were. And why now??!

Anyway, that's what fixed it for me. Thanks!


On 4 November 2016 at 21:31, Jonathan H <lardconcepts at gmail.com> wrote:

> Two VPSs. Identical setups with the exception of the extension.
>
> Same version of everything, Asterisk 14.1, Ubuntu 16.10, same firewall
> rules and so on -  box 2 was cloned from box 1.
>
> Both VPSs run in the same datacentre.
>
> Suddenly, after weeks of OK, I'm getting lots of this on ONE box only:
>
> [Nov  4 21:23:04] NOTICE[1468]: res_hep.c:466 hep_queue_cb: Unable to
> send packet: Address Family mismatch between source/destination
> [Nov  4 21:23:04] NOTICE[1468]: res_hep.c:466 hep_queue_cb: Unable to
> send packet: Address Family mismatch between source/destination
>
> Googling this brings up something about IPv6, but my VPS is not IPv6
> enabled, and nor is my ITSP, who can't think of why this is happening.
>
> It doesn't appear to be adversely affecting call quality, but it's
> making the console a bit busy. I know I can hide it, but I'd be
> interested to know if there's anything I can do to diagnose WHY this
> is happening.
>
> Thanks
>
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