Small text from a book "Usually the IP source of an OSPF packet is set to the interface on the router.IT IS POSSIBLE TO USE IP UNNUMBERED INTERFACES WITH OSPF.On unnumbered interfaces , the ip source address is set to the ip address of another interface of the router."
Please can anyone explain this text.
If you configure this static route on the router which is on the other side of the unnumbered link, then you need a dynamic routing protocol or another static route so the router will know that this next-hop is reachable via the pt2pt interface:
ip route sharedip mask serialx/y
Both static routes can also be replaced by the following one:
ip route destinationip mask serialx/y