topic Re: NFS exported mounted on CentOS but denied on Ubuntu in Network and Storage Protocols

NFS exported mounted on CentOS but denied on Ubuntu

zepherdog — Wed, 04 Jun 2025 14:40:05 GMT

Hi all, I'm running some NFS mount tests this morning and getting some weird results

Disclaimer - newbie to linux and netapp - any help is greatly apprecaited!

CentOS will mount

Ubuntu will not

Same commands are issued

mount –t nfs 10.250.1.5:/Vol003 /mnt/db

From Centos

From Ubuntu

here are the details on the Volume

Any ideas

Cheers Mike

Re: NFS exported mounted on CentOS but denied on Ubuntu

AlexDawson — Wed, 30 Aug 2017 02:39:30 GMT

Looking at the IPs for the NFS share and for the hosts in the export policy, I see they are on different subnets.

This means that if you have multiple NICs in your CentOS and ubuntu systems, it will use whichever NIC holds the default route to mount the storage, this might be a different one to the one you plan. Can you confirm if there are multiple NICs in these VMs and if so, what the IPs are?

Re: NFS exported mounted on CentOS but denied on Ubuntu

zepherdog — Wed, 30 Aug 2017 03:02:04 GMT

HI Alex

Both VMs have a single NIC, as follows

CentOS VM is on 10.255.255.71
Ubuntu VM is on 10.255.255.86

The Filer is in a different location (layer3) and both can ping the 10.250.1.5 address ok

Cheers

Mike

Re: NFS exported mounted on CentOS but denied on Ubuntu

AlexDawson — Wed, 30 Aug 2017 03:16:09 GMT

It looks like this is a test scenario? Can you make the Ubuntu system take on the CentOS system IP and see if it works then?

A good resource to work through is our NFS troubleshooting guide for Clustered ONTAP - let me know how it goes!

Re: NFS exported mounted on CentOS but denied on Ubuntu

zepherdog — Wed, 30 Aug 2017 06:27:23 GMT

Is an issue with my base Ubuntu Image - deployed and AWS Ubuntu AMI and the NFS mount command worked......

Re: NFS exported mounted on CentOS but denied on Ubuntu

zepherdog — Wed, 30 Aug 2017 20:27:26 GMT

On the 14.04 Ubuntu Image, that i was experiencing issues on, I needed to add this options

-o v3

and it mounted. This wasn't required for my 16.04 image