The RB750G (192.168.1.0) is my central. Other site RB750 (192.168.20.0) link to it and get data. If the connection lost (means ping rto), then currently workaround is just remote by public ip to svr central and do a ping (192.168.20.x) and will back to alive again. Troublesome right?
Maybe it would be good idea to fix the link between both routers firstly.
DPD is working fine for me, when link is down after specific time /installed-sa are cleared.
Note, that DPD does not stabilize the connection, it helps for IPSec to clear installed-sa when link is down.
I heard from my friends feedback that MT weaks on vpn
DId they contacted us and reported all the problems to (firstname.lastname@example.org
As far as I know all supported tunnels are working fine. At least I'm not aware of any serious issue.