iSCSI Configurations | NetApp | Page 1

opaque elm Mar 25, 2024, 2:23 PM

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Hi Team,

I have one question as we are doing iscsi first time , so I have question should I go for LACP ifgrp or not
And is there any documentation as I’m searching and finding none

Thanks a lot
Avi

craggy breach Mar 25, 2024, 5:57 PM

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It’s ok to do LACP on the Netapp side. Generally speaking most hosts do not like or support iscsi host side using LACP. (Like windows and esx). You are better off using separate interfaces on hosts and LACP on the Netapp.
Exception like rule: if you care to team your interfaces to a hypervisor, that is ok. The guest should have multiple interfaces (non teaming) for iscsi.

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Another note, there was a bug as while ago under windows with an Intel driver whereas if you tried to use vlan tagging AND jumbo frames , iscsi would not function. It was like the last note in the 99 page readme file!

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When possible using stand alone interfaces, make the native vlan the appropriate iscsi vlan.

opaque elm Mar 25, 2024, 6:01 PM

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Thanks @craggy breach , I have request do you have best practices guide

craggy breach Mar 25, 2024, 6:02 PM

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Not sure there is one. I just use my mind (coming up on 30 years of Netapp)

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Lessons learned 😁

opaque elm Mar 25, 2024, 6:03 PM

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craggy breach Not sure there is one. I just use my mind (coming up on 30 years of Netapp)

Oh 😄 it’s a great experience thank you for help

copper pollen Mar 26, 2024, 4:27 PM

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never had any problems using aggregated interfaces with iscsi on the netapp side... hosts were always vms

opaque elm Mar 26, 2024, 9:41 PM

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copper pollen never had any problems using aggregated interfaces with iscsi on the netapp side...

They are you using MPIO

wanton vortex Mar 26, 2024, 10:28 PM

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it’s recommended to use 2 separate vlans (subnets) and interfaces for iscsi traffic for failover and MPIO benefits. feel free to use ifgrps if you want (and the hosts supports it). https://docs.netapp.com/us-en/ontap/san-config/iscsi-config-concept.html

Considerations for iSCSI configurations overview

You should consider several things when setting up your iSCSI configuration.

copper pollen Mar 28, 2024, 7:31 PM

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opaque elm They are you using MPIO

any time there is more than one path, you should use multipathing software. That's a universal truth for all block devices.

timid vapor Mar 29, 2024, 9:20 AM

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depending on the host, you should also utilize the netapp host utilities as well as pay attention to the maximum number of paths that the OS supports/recommends

opaque elm Mar 30, 2024, 7:33 PM

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But in VMware doc it says LACP is it’s enemy

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So I’m wondering should I use static or multi with what load distribution robin

#iSCSI Configurations