As this problem was confirmed by other users still not to be solved in 6.28, I owe my recent findings:
Now, all devices involved in my problem run 6.27. When this problem happens time to time, this is the most easy and 100% (so far) working immediate solution:
- delete all “DI” marked addresses at SSTP client device.
- switch off the SSTP interfaces that belonged to previously deleted ip addresses at client device.
- wait for 20-30 seconds
- switch on the previously switched SSTP interfaces.
After that the connections are etablished again and the ip addresses are perfectly valid and working. No need to touch the server side.
There is still open ticket [Ticket#2015021466000104] lastly replied from Mikrotik side by this message (after I informed them that the same happens to L2TP also) on 16.3.2015:
Hello,
Thank you about your report. Just now did manage to reproduce this issue with L2TP.
I have forwarded this issue to our programmer. Hopefully he will manage to fix it as soon as possible.
Regards,
Martins S.
Mikrotik is talking with me again.
To all who have the same problem: Please, provide access to your client device to mikrotik staff when you see the “DI” state on SSTP or L2TP client interface address by sending message to support@mikrotik.com.