> which in turn would prevent all communications. Also, as per RFC
> 2401 we do not in general have the possibility to specify policies
> for individual ICMP message types.
This passed the IESG in RFC 2894 (so it must be true):
Note that for the SPD to distinguish Router Renumbering from other
ICMP packets requires the use of the ICMP Type field as a selector.
This is consistent with, although not mentioned by, the Security
Architecture specification [IPSEC].
It's no contradiction with what you said, though.
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