Dear support,

I have 2x ER7206 routers which is installed for my 2 branches. 2 days before i configured ipsec site to site vpn for the two branches and everything worked fine until yesterday. 

now the site to site vpn is down. 

the logs are showing the following error 18 and 1 but i can not find anything related to that error because is worked fine for 2 days and suddenly it went down.

for sure there is was no changes made