Inbound ICMPv6 messages are not blocked

From Perimeter Router Security Technical Implementation Guide Cisco

Rules

SV-41069r1_ruleThe network element can permit inbound ICMPv6 messages Packet-too-big (type 2), Time Exceeded (type 3), Parameter Problem (type 4), Echo Reply (type 129), and Neighbor Discovery (type 135-136). Remaining ICMPv6 messages must be blocked inbound.

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