R1 is unable to establish an OSPF neighbor relationship with R3. What reason for

menglibinghe

Refer to the graphic. R1 is unable to establish an OSPF neighbor relationship with R3. What are possible
reasons for this problem? (Choose two.)

A. All of the routers need to be configured for backbone Area 1.
B. R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.
C. A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being
established.
D. The hello and dead interval timers are not set to the same values on R1 and R3.
E. EIGRP is also configured on these routers with a lower administrative distance.
F. R1 and R3 are configured in different areas.


我的问题是为什么要选择F，从图上可以看到R3已经和R1同在一个区域中了。

zhenqiangbill

他说的是be configured in different areas,是应该在一个区域，但是如果配置错了配到不同区域就会导致邻居关系建立不起来。问题也只是问的possible reason.

menglibinghe

那题目的附图就应该将椭圆和“OSF Area 0”字样去掉，感觉这就是在误导人

草履虫

哈哈，正好看到这题，也有一样的疑惑