I have a primary and secondary dns server setup in resolv.conf, with a timeout option of 1 second.
The idea is when the primary fails, my secondary server picks up the workload.

When openser is running, and primary dns is down, I am seeing several re-transmissions of 200 OK (invite) to my originator *after* openser has finished processing ACK. I was thinking the final responses would stop reTX after the ACK was t_relayed.

Have you seen such behavior? And better yet- Is there a solution for this?
Thanks, Will