Cisco 100-105 Exam

Which command enables IPv6 forwarding on a cisco router?

  • A. ipv6 host
  • B. ipv6 unicast-routing
  • C. ipv6 local
  • D. ipv6 neighbor
Answer: Option B.
Explanation: 

Enabling IPv6 on Cisco IOS Software Technology
http://www.ciscopress.com/articles/article.asp?p=31948&seqNum=4
The first step of enabling IPv6 on a Cisco router is the activation of IPv6 traffic forwarding to forward unicast IPv6 packets between network interfaces. By default,
IPv6 traffic forwarding is disabled on Cisco routers.
The ipv6 unicast-routing command is used to enable the forwarding of IPv6 packets between interfaces on the router. The syntax for this command is as follows:
Router(config)#ipv6 unicast-routing
The ipv6 unicast-routing command is enabled on a global basis.

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