HPE7-A08 · Question #59

You have applied the following OSPF configuration but are seeing the output from the command below. What is the reason for this?

The correct answer is C. A different OSPF process ID is used on each switch. Both devices are in the same VRF and the VLAN 101 interfaces are in the same subnet, but each switch is using a different OSPF process ID (Agg-1 uses OSPF 1, Agg-2 uses OSPF 2). On Aruba CX, OSPF neighbors must run the same OSPF process ID within the same VRF in order to form…

Implement and Troubleshoot HPE Aruba Networking CX Switch Solutions

Question

Exhibits

Options

AA loopback interface hasn't been configured on Agg-2
BOSPF interfaces are passive by default
CA different OSPF process ID is used on each switch
DA Layer-3 interface has not been associated with a VRF

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(51 responses)

A
24% (12)
B
14% (7)
C
57% (29)
D
6% (3)

Explanation

Both devices are in the same VRF and the VLAN 101 interfaces are in the same subnet, but each switch is using a different OSPF process ID (Agg-1 uses OSPF 1, Agg-2 uses OSPF 2). On Aruba CX, OSPF neighbors must run the same OSPF process ID within the same VRF in order to form an adjacency.

Topics

#OSPF#process ID mismatch#adjacency failure#routing troubleshooting

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