[OpenSIPS-Users] DNS could not resolve hostname in dispatcher

[guillaume.desgeorge at orange.com]

Hi everyone,

We are facing a problem with Opensips 3.3 (but I've done tests on opensips 2.4 and it was the same).

In the dispatcher, if we have a name instead of an IP address in "destination", and that the DNS falls down, we have an error "could not resolve hostname" in the log. Then, Opensips can't resolve the name, there is no more OPTIONS message sent to the destination but the state stays as 0 and if a call arrives, Opensips still route the INVITE to the last known IP address.

I find that's strange :

  *   Either Opensips consider that the DNS is down but the destination may be still up with the last IP address he knows and he could still send OPTIONS messages to the last known IP address
  *   Either Opensips consider that the DNS is down and doesn't send OPTIONS message but in that case he should not send INVITE to the old IP address.

I work with a product that has his own DNS and removes the name of the server in the DNS when the machine is down. So everytime the server is down, Opensips can't resolve the name and still send calls to that server...

Is there any parameters I can use to change that way of working ?

Regards,

    Guillaume
Orange Restricted

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