Cannot establish IPSec Site-to-Site tunnels after upgrade to 6.38.1

RouterOS General
1

Hi,

After upgrade MT to 6.38.1 all IPSec connections cannot establish connection. Problem occurred on Phase2 stage.
Not only MT-to-MT tunnels went down but also MT-to-Cisco.

Reverted back to 6.37.4 and problems resolved.

2

You could try the 6.39RC because there has been a lot of work being done on IPSEC in that version.