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What impact is caused when disabling CDP and LLDP on ONTAP?

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Applies to

  • ONTAP 9
  • Cisco Discovery Protocol (CDP)
  • Link Layer Discovery Protocol (LLDP)

Answer

  • Disabling these protocols prevents ONTAP from detecting the neighbor information.
  • The cluster network and switchless configuration detection use these protocols to view the information of neighboring devices that are connected to each port of the nodes.
  • CDP/LLDP is an essential functionality for switched clusters on the cluster network for cluster session manager (CSM) to work as designed.
  • It is not expected to turn off CDP/LDDP for the OTNAP internal cluster network.

Additional Information

When using system cluster-switch create command, it does use SNMP for switch information discovery and cluster switch health monitoring. CDP/LDDP are still required for CSM to work properly and the use of SNMP for monitoring does not mean that CDP/LLDP can get disabled on cluster network.

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