Suppose we have three routers R1 R2 and R3 with full mesh connectivity in OSPF broadcast network (LAN). R1 becomes DR. R2 BDR and R3 is forming adjacency with both of them. Now let router r4 be attached but it can only hear and send to R3 only, (because of say network malfunctioning) which sends hello saying his DR is R1 and BDR are r2 but it himself does not assume any of the duties. The questions is will r4 elect r3 as his dr (because according to rfc 9.4 nothing makes him non eligible for dr election algorithm. Assume r3 priority is not zero. Can someone shed a light what would happen according to standard on such situations.
R1(DR)--R2(BDR) \ / \ / \ / \/ R3 HELLO=(DR=R1, BDR=R2) | | R4 ELECTED DR - ???