ONTAP and FAS Articles and Resources

An Overview of NFSv4 (SNIA)


This SNIA report explains the improvements in NFSv4 & NFSv4.1. It also covers the features to expect in NFSv4.2.

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Good Morning,

and thank you for your help in advance to my first post request. 

FAULT - Intermitted interface connection drop out from NFSv4 clients and ping request.


Overview - we have approx. 200 HPC servers connecting to a FAS8200 HA pair running clustered ontap 9.5P8, the clients are load balanced to both nodes via their IP addresses from the client side. the nodes have 1 HPC only interface consisting of 2 physical ports using multimode. node 1 interface losing connectivity to all clients connected to it, its very intermittent and shows no pattern or logic like load issues. we have no errors on interfaces, ports , nodes -nothing , same with network (clients and Nodes are off the same physical switch and same VLAN), no errors from client side other than losing connectivity which lasts a few seconds to a couple of min. we have even done packet analysis on the interface and this shows nothing other than a complete stop in communication. i have even moved interface to node 2 and the fault migrates to it (indicating no filer hardware issues)


has anyone experience anything like this before, HPC and network engineers adamant no fault there either ?