EIGRPv6 Interfaces
By enabling EIGRPv6 on an interface, the router attempts to do two things:
1. Discover EIGRPv6 neighbors off that interface
2. Advertise about the prefix connected to that interface
To make sure that EIGRPv6 works correctly, an engineer should verify that EIGRPv6 is enabled on the right interfaces. Or, from a troubleshooting perspective, some of the most common problems with EIGRPv6 may be because a router did not enable EIGRPv6 on an interface.
As was the case for EIGRPv4, with EIGRPv6, some commands list all interfaces on which EIGRP is enabled (including passive), some list all EIGRP interfaces but note which are passive, and some simply do not list the passive interfaces. Example 18-6 shows a sample that points out these ...
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