Systems and methods for ARP resolution over an asynchronous cluster network
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United States of America Patent
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Oct 17, 2017
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Dec 19, 2013
app pub date -
Jun 15, 2012
filing date -
Jun 15, 2012
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Abstract
In the present solution, when a cluster node sends an ARP request for an external IP, the node sends a message to all the other nodes, which are part of the CLAG to expect an ARP reply for the IP. When a node in the cluster receives the ARP reply, the node informs the other nodes which are part of the same CLAG to update the MAC address. Also when an ARP entry is learned/updated over a CLAG link as part of an ARP request/Gratuitous ARP, the node learning/updating the ARP entry will inform other nodes which are part of the same CLAG about the learned/updated ARP entry. Nodes in a cluster may communicate between with each other over a dedicated backplane, which may be a separate physical medium.
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