I have set an IP Tunnel UP between 2 Mikrotiks RB751G. All is working, by the way i’ma asking if it is possible to keep this tunnel up? It can no stay UP, i need to ping an IP from both Routers to bring it UP. Is there any way? Keepalive or something else?
GRE the same as IPIP and EoIP were originally developed as stateless tunnels. Meaning that if remote end of the tunnels goes down all traffic that was routed over the tunnels gets blackholed. To solve this problem RouterOS have added keepalive feature for GRE tunnels.