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Assessment Title
Rule Text
The Cisco ACI must not be configured to use IPv6 site local unicast addresses.
Description
Discussion Text
As currently defined, site local addresses are ambiguous and can be present in multiple sites. The address itself does not contain any indication of the site to which it belongs. The use of site-local addresses has the potential to adversely affect network security through leaks, ambiguity, and potential misrouting as documented in section 2 of RFC3879. RFC3879 formally deprecates the IPv6 site-local unicast prefix FEC0::/10 as defined in RFC3513.
Specify the appropriate IPv6 address range within the relevant configuration objects like bridge domains and L3Out, ensuring the addresses fall within the allocated site local unicast prefix, and enable IPv6 routing on the fabric level, allowing the ACI switches to learn and route traffic based on these IPv6 addresses.
Specify the appropriate IPv6 address range within the relevant configuration objects like bridge domains and L3Out, ensuring the addresses fall within the allocated site local unicast prefix, and enable IPv6 routing on the fabric level, allowing the ACI switches to learn and route traffic based on these IPv6 addresses.
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