350-401 · Question #593
Refer to the exhibit. R2 is the neighboring router of R1. R2 receives an advertisement for network 192.168.10.50/32. Which configuration should be applied for the subnet to be advertised with the orig
The correct answer is C. R1(config)#interface loopback0 R1(config-if)# ip ospf network point-to-point. By default, OSPF advertises loopback interfaces as /32 host routes regardless of the configured subnet mask. Configuring the loopback interface with 'ip ospf network point-to-point' overrides this default behavior and causes OSPF to advertise the loopback with its actual configur
Question
Refer to the exhibit. R2 is the neighboring router of R1. R2 receives an advertisement for network 192.168.10.50/32. Which configuration should be applied for the subnet to be advertised with the original /24 netmask? A. B. C. D.
Exhibits
Options
- AR1(config)#router ospf 1 R1(config-router)#network 192.168.10.0 255.255.255.0 area 0
- BR1(config)#interface loopback0 R1(config-if)# ip ospf 1 area 0
- CR1(config)#interface loopback0 R1(config-if)# ip ospf network point-to-point
- DR1(config)#interface loopback0 R1(config-if)# ip ospf network non-broadcast
How the community answered
(20 responses)- A5% (1)
- B5% (1)
- C80% (16)
- D10% (2)
Explanation
By default, OSPF advertises loopback interfaces as /32 host routes regardless of the configured subnet mask. Configuring the loopback interface with 'ip ospf network point-to-point' overrides this default behavior and causes OSPF to advertise the loopback with its actual configured subnet mask (in this case /24), which is what R2 will then receive.
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