Re: [Openvpn-users] Intermittently lost connections - affecting IP Phones

[Leonard Isham <leonard.isham@xxxxxxxxx>]

On 2/1/06, Cameron Gocke <livedrive777@xxxxxxxxx> wrote:
> Over the last couple of months I've had numerous reports of
> intermittent loss of connectivity.  This doesn't last for more than a
> few seconds, but it results in the users' dropping their IP phone
> connection.  At first I started troubleshooting the Inactivity timeout
> messages, but have all but eliminated those and the issue continues.
> (Aside from which I would assume that the IP phone would be sending
> traffic over the VPN and therefore keep it from timing out.)
>
> I am getting these messages:
> Wed Feb 01 15:21:58 2006 clientname/71.99.3.226:1142 TLS: tls_process:
> killed expiring key
>
> Almost exactly every hour on the client side, but am not losing
> connection nearly that often.
>
> I've done some preliminary testing, and I don't see any evidence that
> their internet connectivity is dropping at any point.
>
> Does anyone have any suggestions for me?
>

Packet loss, latency issues, bottlenecking, or dynamic IP
reallocation(with a new IP).  Could all potentually cause the problem.

Is the universal or anly limited to a few?

Have you checked for resource starvation on your systems?

How about bandwidth saturation, typically about 70%+ utilization,?

Use packet captures to look for latency issues or lost packets.

--
Leonard Isham, CISSP
Ostendo non ostento.


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