Host Is Missing IPv6 Settings: SLAAC Issues
For the fifth troubleshooting scenario, take the previous scenario but assume the enterprise uses SLAAC rather than stateful DHCPv6 for IPv6 address assignment. To review, the engineer has discovered that host D has not learned its IPv6 address. So, what could cause SLAAC to fail? This next topic explores the potential root causes.
To understand some of the root causes for such a problem, first review the three steps a host takes when using SLAAC to learn and build its IPv6 settings:
1. Use NDP to learn the prefix, prefix length, and default router address from a router on the same subnet.
2. Use SLAAC rules, locally on the host (no network messages required), to build the host’s own IPv6 address.
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