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Present Equal Logic to two ESX servers

Posted on 2013-11-04
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Last Modified: 2016-11-23
Hi All,

We bought a Dell Equal Logic around December last year and have been trailing performance over the last 8 months with it connected to a single ESX host, which has went well.

I am now looking to connect the Equal Logic to the second ESX server.

I've followed the same steps and everything is going well.

I now just need to change the Access control on the volume so the second ESX server can see it.

As you can see from the picture below, I've restricted access to the iSCSI initiator of ESX1

SAN ACL
ESX2 has an iSCSI initiator of iqn.1998-01.com.vmware:amesx2-232bba1d

I'm not sure if I can do it via iSCSI initiator, or if i have to change it to IP address.  If so here's the info on the current iSCSI connection (they are the two NICs on ESX1).

SAN IPs
The IP addresses I assigned to ESX2 are 192.168.1.37 and 192.168.1.38, with a heartbeat of 192.168.1.39.

ESX1 has a heartbeat IP of 192.168.1.36


There was a section in the PDF instructions that said I needed to enable multi access (highlighted in yellow below).  Where do I enable/check this setting after the connection has been setup?

SAN ACL

We are currently running 15 VM's on ESX1, so would like to avoid any downtime.


** UPDATE **

Ok so i felt brave and changed ACL to the IP address

New Settings
and when I rescan i can see the SAN on both ESX servers

ESX can see the SAN

I'd still like to know where the simultaneous connections is se;  and anythig else I might have over looked.



many thanks in advance.
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Question by:detox1978
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Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39622259
I would recommend at least you use an IP Address and iSCSI initiator IQN.

We also use the full IP Address, and not wildcards, so you give specifc access by FULL IP Address and IQN of the Host Server, this way it safeguards any errors, mistakenly giving access to a server you should not.

You also want to configure Multipaths, via iSCSI, Jumbo Frames

HOW TO: Add an iSCSI Software Adaptor and Create an iSCSI Multipath Network in VMware vSphere Hypervisor ESXi 5.0

HOW TO: Enable Jumbo Frames on a VMware vSphere Hypervisor (ESXi 5.0) host server using the VMware vSphere Client

Also download the multipathing module from Equallogic, and there are some other iSCSI tweaks I can advise.

On our Dell Equallogic, if you show all the volumes, and select a Volume, and right click Modify Settings.

So you will have General, Space, Advanced, Click the Advanced Tab, where you can change volume RAID preference, there is a setting ALLOW simultaneous connections from initiators with different IQNs, you will want this ticked also!

simultaneousIQNs
If I can be of any more help, please just ask, we do this stuff on a daily basis!
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by:detox1978
ID: 39622474
thanks for the links, both look very helpful so I will read them in more detail later this week.

I've check the setting an simultaneous connections are enabled.

The volume I've created is to be accessed by two ESX servers.  How do I add two  iSCSI initiator and IP's?
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Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39622578
Right Click - Volume - Modify Settings - Add

you be able then to add IP address and IQNs

tick IP Address, put IP address that matches IQN

so IP Address - 192.168.1.1

IQN - vmware...blah blah blah

add.

you should then see a list of all the IP Addresses and IQNs which have access to the LUN.

If you are Risk Adverse, you may want to consider using CHAP!
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by:detox1978
ID: 39622749
I cant see the Add option?

Settings
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by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39622839
Sorry, a typo....it's

Right Click - Volume - View iSCSI Settings - Add
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by:detox1978
ID: 39622888
Excellent thanks.
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