5 Comments on “Which approach can you use to implement IPv6-over-IPv4 tunneling?”

1. anan says:

   January 9, 2017 at 7:26 pm

   how this would be possible ?
   why not B ??

   
   
   
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2. a1.0 says:

   February 6, 2017 at 3:49 am

   D is true

   
   
   
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3. Anton says:

   May 9, 2017 at 6:47 am

   It should be “D” answer… 6PE technique can transparently transfer IPv6 packets over IP(4)/MPLS backbone (encapsulated).
   Let’s think…
   A. – “IPv4-compatible addressing” – Wrong. It’s NOT tunneling. It’s MAPPING.
   B. – “DUAL STACK” – Wrong. Because of… It’s NOT tunneling too. This is the most desirable IPv6 implementation during the transition from IPv4 to IPv6, as it avoids the complexities of tunneling.
   C. – IPsec. Wrong. You couldn’t use IPsec for non-ip traffic. Yes IPv6 is not IP. You must implement GRE OVER IPSEC for tunneling IPv6 over IPv4.
   D. – It seems to be correct answer. Because in this case you are encapsulate your original IPv6 packet into the IP/MPLS packet.

   
   
   
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4. Johnny says:

   January 12, 2018 at 3:30 pm

   This question is in Junos Genius. The correct answer there is
   C) configured tunnel

   This refers to GRE-tunneling NOT IPSEC.

   Bad copy on this one.

   
   
   
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5. kiyokaa says:

   August 13, 2020 at 12:56 pm

   6PE is a dual stack MPLS VPN solution for ipv6 private network VPN over ipv4 backbone mpls network.

   IPsec isn’t a GRE tunnel, it cannot encapsulate ipv6 over ipv4.

   none of the answers correct.

   
   
   
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