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Neighbor discovery works over the ICMPv6 Neighbor Discovery protocol, which is the functional equivalent of the IPv4 ARP protocol. ICMPv6 Neighbor Discovery Protocol must be explicitly permitted in the Access Control Rule Base for all bridged networks. This is different from ARP. ARP traffic is Layer 2 only, therefore it permitted regardless of the Rule Base.
This is an example of an explicit Rule Base that permits ICMPv6 Neighbor Discovery protocol:
Source |
Destination |
Services and Applications |
Action |
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Network object that represents the Bridged Network |
Network object that represents the Bridged Network |
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