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Configuring Cisco Switch / Router to work with ClusterXL Multicast ARPs
Symptoms
  • Communication between Cisco equipment and Check Point ClusterXL fails.
Cause

Check Point clusters use Unicast IP addresses and Multicast MAC addresses.

Cisco adheres to RFC1812 "Requirements for IP Version 4 Routers", which states:

"A router MUST not believe any ARP reply that claims that the Link Layer address of another host or router is a broadcast or multicast address."


Solution
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