OSPFv3

[sivam siva]

Hi

Which type of address does OSPFv3 use to form neighbor adjacencies and to send LSAs?
A. unicast IPv6 addresses
B. link-local addresses
C. multicast address FF02::5
D. unicast IPv4 addresses

I believe both link-local address and multicast address FF02::5 are used for the neighbor formation.

Can anyone give the one answer, question-wording are seems to be tricky for me.

[Jaderson Pessoa]

@sivam siva Hello,

I hope that it can help you

For me, answer is: C

[Georg Pauwen]

Hello,

for the sake of verification, I configured two OSPF neighbors and ran a debug:

GigabitEthernet0/0 is up, line protocol is up
Link Local Address FE80::E39:1BFF:FED8:6000, Interface ID 2

*Dec 13 12:14:51.990: OSPFv3-1-IPv6 PAK : Gi0/0: OUT: FE80::E39:1BFF:FED8:6000->FF02::5: ver:3 type:4 len:64 rid:1.1.1.1 area:0.0.0.1 chksum:6492 inst:0

[luis_cordova]

Hi @sivam siva 

 The answer is:

C. multicast address FF02::5

OSPF for IPv4 uses the multicast 204.0.0.5

OSPF for IPv6 uses the multicast FF02::5

Check this: 

https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2017/pdf/BRKRST-2022.pdf

Regards

[akhurshiddk]

Link local address

[Georg Pauwen]

Are multiple answers possible, or is just one answer allowed ?

[sivam siva]

Hi @georg
only one answer, that is the Unfortunate question.

Thanks
Siva