Cisco ICND2 – Describe the technological requirements for running IPv6 (including: protocols, dual stack, tunneling, etc)

IPv6 is the new IP addressing scheme that will be replacing IPv4. Why? We are running out of IPv4 addresses. As technology is growing (smartphones, tablets, fridges with internet) with more and more devices being attached to the Internet via 3G/4G/Broadband etc and consuming IPv4 addresses.

Requirements for running IPv6

  • Routers and Switches must support IPv6
  • Operating system and NICs must support IPv6 (recent one do, legacy ones maybe not)
  • Its possible to run IPv4 and IPv6 using Dual Stacking
  • Tunneling for IPv6 to communicate over an IPv6 network to reach another IPv6 network

RIPng

  • Same features as the traditional RIP
  • Support for IPv6
  • Does not support authentication
  • UDP port now 521 instead of port 520
  • Multicast FF02::9
  • Run an instance of RIPng per interface
  • network command has been replaced by ipv6 rip 1 enable

EIGRPv6

  • Same features as the traditional EIGRP
  • Support for IPv6
  • Multicast FF02::A
  • network command replaced by ipv6 router eigrp 5
  • Must no shutdown the routing process

OSPFv6

  • Same features as the traditional OSPF
  • Multicast FF02::5 for OSPF routers / FF02::6 for OSPF-designated routers

Dual stack

  • Allows IPv6 and IPv4 to run alongside each other

Tunneling

  • Encapsulates IPv6 packets within IPv4
  • Allows an IPv6 to communicate over an IPv4 network to reach another IPv6 network