For those that don't know: https://www.rfc-editor.org/rfc/rfc4291#section-2.6.1 https://www.rfc-editor.org/rfc/rfc4291#section-2.6.1 Linux in particular, if IP

For those that don't know: https://www.rfc-editor.org/rfc/rfc4291#section-2.6.1 https://www.rfc-editor.org/rfc/rfc4291#section-2.6.1 Linux in particular, if IPv6 forwarding is enabled, will automatically add an anycast route for the 0'th subnet address. (Unless it's a /127 subnet per https://www.rfc-editor.org/rfc/rfc6164 https://www.rfc-editor.org/rfc/rfc6164.)