David Modesto

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David Modesto

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May 2nd, 2023 14:00

ME5 Direct Attached

Hey guys, I'm not sure how to connect and define the iSCSI IPs in a scenario with 2 hosts with 2 ports each, directly connected to the ME5.

In the deployment guide (https://dl.dell.com/content/manual51896558-dell-powervault-me5-series-storage-system-deployment-guide.pdf?language=en-us), it shows the following information for connecting the Storage in Direct Atacched mode with 2 hosts (page 34):

Host 1 - Port 0 > Controller A port 0
Host 1 - Port 1 > Controller B port 0

Host 2 - Port 0 > Controller A port 2
Host 2 - Port 1 > Controller B port 2

In the example of IP addresses for iSCSI, in the deployment guide it shows as follows (page 31 and 55):

Host 1 - Port 0 > ip on subnet 1
Host 1 - Port 1 > ip on subnet 2

Host 2 - Port 0 > ip on subnet 1
Host 2 - Port 1 > ip on subnet 2

But for the Storage ports, both ports 0 and 2 of controller A, and ports 0 and 2 of controller B are in the same subnet (subnet 1).

Searching a little more, I found a Best Practices document (https://infohub.delltechnologies.com/l/dell-powervault-me5-series-vmware-vsphere-best-practices/direct-attached-storage-14), in it the connection of the servers with the storage are on different ports, as an example the first server from bottom to top is as follows:

Host 1 - Port 0 > Controller A port 0
Host 1 - Port 1 > Controller B port 3

That way, a port for each host would be in a different subnet, following the configuration suggested in the deployment guide.

There is the doubt, which of the 2 ways should I follow to deploy this storage?

If I follow the Deployment Guide's connection model, I'll need to put the hosts' IPs all on the same subnet, both port 0 and port 1. If I follow the best practices manual procedure I'll have each host port in one different subnet, thus following the most common way when we deploy using switch attached.

I thank you all. (Sorry for the English by Google Translator).

  • DELL-Joey C

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    Posted May 2nd, 2023 20:00

    Hi @David Modesto,

     

    Both guides are correct, it only depends on the administrator's preference to how it needs to be cabled. 

     

    For a better easy installation, you can follow the first guide you have attached: https://dell.to/3Vt30Xd

    DELL-Joey C

    Social Media and Communities Professional

    Dell Technologies | Enterprise Support Services

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    Did I answer your query? Please click on ‘Mark as Accepted Answer’ if I did. 

  • Origin3k

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    Posted May 2nd, 2023 23:00

    Iam in hurry .... and i cant help at first but i totally under stand the virutal question mark @David Modesto  have. I think the documention isnt as good as it should because of

    From the Joe User perspective i always think its hard to follow the documention when controller modules named A/B or 0/1 because i always think is there also a 1+2 out there?  The we have to turn one controller on 180° to fit it into the chassis is also a way to make easy cabling failures But hey.. if you have luck they print labels on twice so you can read them in the normal way.

    @David Modesto 
    what ever it takes .... you need the Dual Subnet (Non-Bindung) setup from the  ESXi host perspective.

    Regards,
    Joerg