Is there a way to force VRRP to monitor more then one interface? At present VRRP monitors only this interface on which it's running itself. I'd like to switch to backup mode if any of interfaces is down.

I have 2 routers, on the external side of both the routers I have OSPF configured, on the internal I have VRRP.
If internal side of master fails, VRRP backup switches to MASTER and OSPF paths are updated - everythings is OK.
If external side of master fails, VRRP backup doesn't switch to MASTER and my clients loose routing,

I'm quite sure that linux implementation keepalived had a option to configure interfaces to monitor.

You have to run two VRRP instances. One for internal interface and one for external.

You have to run two VRRP instances. One for internal interface and one for external.

The external interface are router ports connected to OSPF router. They are not connected each other at Layer2. As VRRP communication is Multicast it's not possible to exchange VRRP information between these external interfaces.

Correct me, if I'm wrong.