Date: Sun, 25 Apr 2021 18:20:37 +0800 From: Zhenlei Huang <zlei.huang@gmail.com> To: freebsd-hackers@freebsd.org Subject: Are there any RFCs for address selection for IPv4 Message-ID: <D66C20B9-24FA-4557-96F0-90E56B982150@gmail.com>
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Hello hackers, For IPv6 there's RFC 6724 to clarify the default address selection = procedure,=20 both for source address selection and destination address selection. Are = there any RFCs like RFC 6724 that are for IPv4?=20 I'm exploring RFC 3927, consider this situation, a host configured with = link-local address on NIC and global unicast alias address on loopback interface, = and default route to=20 the link-local address of router (some ISPs do this). The current = implementation kernel will use the link-local address as the source address when initializing = a connection to=20 remote host via the default route. It seems wrong, as link-local address = are not=20 routable as per RFC 3927. So it is important if there's corresponding RFC clarify the source = address selection=20 for IPv4. Thanks :)=
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