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Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard

2017-02-24 05:28:12
IPv4 has no equivalent to RAs, so the workaround is to infer prefix assignment
from address assignment.

Technically that's not quite correct:
RFC-950 defines a subnet mask request/reply.
And RFC 1256 defines router advertisements

Subnet mask ICMPs were never popular. I think some popular implementation
tended to give a wrong reply.

Router advertisements were somewhat popular. But got out of fashion when
DHCP became the standard way of obtaining configuration.

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