NFS/CFS network Troubleshooting process to go through.

[Larry1961]

Hi,

Does someone have a basic process/procedure to go through where a client from a Window/Linux machine cannot contact the nfs/CFS shares due to a probably network issue? I tend to get confused with all the different IP in play across this scenario.

many thanks

Larry

[SpindleNinja]

Depends on the error that the client is getting.   if it's something like "cannot connect" or just spins,  I will do pings between the client to the Netapp's NAS Data lif and from the Netapp's data lif to the client 

If it's like "you do not have permissions". you'll need to check the share permission on the Netapp

Few other helpful links for you - 

https://docs.netapp.com/us-en/ontap-cli-9141//network-ping.html 

you'll want to ping in the context of the vserver (SVM) and lif 

https://docs.netapp.com/us-en/ontap/networking/commands_for_diagnosing_network_problems.html

[wareer]

I thought these links might be helpful

https://kb-cn.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/How_to_troubleshoot_network_connectivity_in_ONTAP_9 

[Ashun]

hi  larry

I hope my reply is helpful to you

1. Identify the Environment

   Determine the Client OS: 

           Windows or Linux.

   Identify the NFS/CFS  IP Address:

           Ensure that the correct IP address is configured

2. Verify Network Connectivity

   Ping the NFS/CFS IP:

          Run the Ping command to ensure reachability

                 network ping 

   Check Routing: 

          Check that the route configuration is correct

                 network route show

3. Check Firewall Settings

     Ensure that the firewall allows the traffic required by NFS/CFS

4. Network Configuration Issues

    Ensure there are no IP address conflicts on the network.

    Check that the subnet mask and gateway Settings are correct

5. Testing with Other Clients

    If possible, test connectivity from another client machine to determine if the issue is isolated to one client or more widespread.

[Larry1961]

Yes, thank you very much.
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[Sanaman]

Your best bet is wireshark on client and tcpdump on NetApp side.