[AusNOG] IPSEC time skew renegotiate?

Beeson, Ayden ABeeson at csu.edu.au
Mon Jan 6 15:02:50 EST 2014


I wouldn't think that would cause it but stranger things have been seen.

Try turning off ntp then see if it fixes it :-)

Cheers,
Ayden

On 06/01/2014 2:10 pm, Geordie Guy <elomis at gmail.com> wrote:
G'day NOGgers,

We have an IPSEC peer that keeps dropping the tunnel and renegotiating. The only events in the logs on their side that look like they could be related are a fairly constant NTP update which is causing their Netscreen to adjust by between 3 and 13 milliseconds every ten minutes.  Would this cause the tunnel to renegotiate when the clock changed?  It seems to happen on the half hour every half hour, or every three NTP updates.

- Geordie

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