Which two of these steps are minimum requirements to configure OSPFv3 under IPv6? (Choose two.)
A.
Configure a routing process using the command ipv6 router ospf [process-id].
B.
Add the network statement for the interfaces on which OSPF will run.
C.
Configure OSPF on the interface that it will run on.
D.
Use the passive-interface command on the interfaces on which OSPF should not run.
E.
Enable routing.
Not sure about this one – I would answer A & E (and I have found a few other occurence of this answer to this question on the web).
I son’t think one can configure OSPFv3 without defining the process first. So I would say one has to
– enable routing
– configure process
then one can configure the per-interface settings.
What do you think?
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Odd question.
You may configure OSPFv3 only on interface, so C is surely correct.
OSPFv3 need also router-id and it will be missing if there is no IPv4 on this router.
In that case you need to specify router-id in ospf process, so my answer would be A,C.
Of course you need to enable IPv6 routing, but it is required for any routing protocol or even static routing.
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C and E is correct:
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/xe-3s/ipv6-xe-36s-book/ip6-ospf.pdf
Prerequisites for Implementing OSPFv3
• Complete the OSPFv3 network strategy and planning for your IPv6 network. For example, you must
decide whether multiple areas are required.
• Enable IPv6 unicast routing.
• Enable IPv6 on the interface.
Configure the IP security (IPsec) secure socket application program interface (API) on OSPFv3 in
order to enable authentication and encryption
Before you can use the IPv4 unicast address families (AFs) in OSPFv3, you must enable IPv6 on a
link, although the link may not be participating in IPv6 unicast AF.
• With the OSPFv3 Address Families feature, you may have two device processes per interface, but only
one process per AF. If the AF is IPv4, you must first configure an IPv4 address on the interface, but
IPv6 must be enabled on the interface
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