[...] As far as I know, no host implementation supports the M flag. Regarding the O flag, I've implemented the host side of the flag, which invokes a DHCPv6 client upon receiving an RA with the O bit. But I've never heard of other implementations.
Here's another data point: The Cisco IPv6 stack implements the host behavior for the O bit, initiating an Information-request exchange when an RA with the O bit set causes OtherConfigFlag to change from FALSE to TRUE. The stack ignores the M bit because there is no code for DHCPv6 address assignment. The RA code in the Cisco stack can be configured to send RAs with the M and O bits cleared or set.
- Ralph
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