In addition to open standard protocols, the Cisco-proprietary EIGRP routing protocol has also been modified to support IPv6. This modified version of EIGRP is sometimes referred to as EIGRPv6 because of its support for IPv6 and not because it is revision 6 of the EIGRP routing protocol. Similarly, EIGRP for IPv4 is also sometimes referred to as EIGRPv4 to differentiate between the routed protocol versions supported by either version.
For the most part, just as is the case with RIPng and RIPv2, EIGRPv6 retains the same basic core functions as EIGRPv4. For example, both versions still use DUAL to . . .
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