NFS and iSCSI sharing the Same vLan

compdigit44
compdigit44 used Ask the Experts™
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I know VMware recommends having separate VMKernel adapters for storage traffic , but is ok to have NFS and iSCSI on separate VMkernel adapters, but using the same vLan?
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Is it okay - In my 20+ years of working with VMware Technologies, we've never configured and mixed iSCSI and NFS traffic on a storage network.

We either have dedicated physical differing networks which carry iSCSI and NFS traffic or we have different VLANs, because sometimes we use different MTUs for iSCSI and NFS.

VMware does not really recommend, VMware didn't really invent NFS or iSCSI, but best practice in the storage world, is to separate if possible...

Are you using the same IP Address range ? or different ?

If you have no choice in the matter, then I suppose it's okay, the server is not going to explode.

But Production Environment, should things not be done proper ?

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Commented:
ideally I would break out each protocol into its own vlab but I may have some limitations that are out of my control.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Same IP Address range or different ?
nociSoftware Engineer
Distinguished Expert 2018
Commented:
There should be more advise around iSCSI & NFS.  

The main differences are NFS is built for medium & short distances and assumes small packet sizes.  (<1500 frames)
Where iSCSI can [erform a LOT better in JUMBO frame environments.  iSCSI is far superior in LAN's. (>8K frames)
iSCSI handles Blocks (kind of virtualised/networked disks)  whereas NFS is file oriented.

IO activity on one of the networks can heavily interfere with the other.  
Mixing regular ethernet traffic & jumbo-frame ethernet is not a recommended practice, unless you are in for researching all kinds of creative methods to hangup systems.
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
I've worked with the OP before, and I didn't want to insult the OP with a lesson in iSCSI versus NFS! The OP has worked with large implementations of VMware vSphere for many years...so my gut feeling is he knows about FC, iSCSI and NFS.....

and wanted some guidance assurance on Best Practice versus what happenes if I cannot do it....

We've actually seen NFS with Jumbo Frames Out Perform iSCSI, and ALL our clients over the last 10+ years moved from iSCSI to NFS! (using large NetApp Filers!).

Both have Jumbo Frames enabled for both iSCSI and NFS.

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