Ospf

[sivam siva]

What does the command clear ipv6 ospf process accomplish?
A. The OSPF adjacencies are cleared and initiated again.
B. The route table is cleared. Then the OSPF neighbors are reformed.
C. The shortest path first (SPF) algorithm is performed on the LSA database.
D. The OSPF database is repopulated. Then the shortest path first (SPF) algorithm is performed.
Correct Answer: D

I believe answer A. any suggestions?

[Jaderson Pessoa]

@sivam siva Hello

Correctly answer is D. 

Look more here:https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/command/ipv6-cr-book/ipv6-c1.html

[sivam siva]

Hi @Jaderson Pessoa 

Thanks for the reply 

Below is my Lab test where you can see the adjacencies are cleared and formed again. 

R1#cle ipv6 ospf process 

Reset ALL OSPF processes? [no]: y
*Mar 1 00:03:06.539: %OSPFv3-5-ADJCHG: Process 1, Nbr 2.2.2.2 on FastEthernet0/0 from FULL to DOWN, Neighbor Down: Interface down or detached
*Mar 1 00:03:06.679: %OSPFv3-5-ADJCHG: Process 1, Nbr 2.2.2.2 on FastEthernet0/0 from LOADING to FULL, Loading Done

So ans A should be more correct right?!

[balaji.bandi]

here is command reference:

clear ipv6 ospf

To clear the Open Shortest Path First (OSPF) state based on the OSPF routing process ID, use the cl ear ipv6 ospf command in privileged EXEC mode.

clear ipv6 ospf [process-id] {process | force-spf | redistribution}

Syntax Description

process-id	(Optional) Internal identification. It is locally assigned and can be any positive integer. The number used here is the number assigned administratively when enabling the OSPF routing process.
process	Restarts the OSPF process.
force-spf	Starts the shortest path first (SPF) algorithm without first clearing the OSPF database.
redistribution	Clears OSPF route redistribution.

[ashok_boin]

The correct answer is D as the command is getting executed with "process" key word which restarts the entire process. Hence, clearing and re-forming adjacencies is just subset of whole "process".