Solved

SAN (HP p2000) connection to ESX hosts

Posted on 2011-09-28
4
909 Views
Last Modified: 2012-05-12
Greetings,

my p2000 has dual controllers each with (2) iSCSI ports. I have (2) open NICs on each of my (2) ESX hosts. is there any benefit to running them through switches (two switches on separate subnets) rather than just connecting directly between the hosts and the SAN? one host NIC to one p2000 controller and the other host NIC to the other p2000 controller, for redundancy of course. My current SANs (AX4-5i and a Promise VessRaid) run through these switches.

thanks a lot
0
Comment
Question by:rpliner
4 Comments
 
LVL 10

Assisted Solution

by:ienaxxx
ienaxxx earned 50 total points
ID: 36720079
just scalability, imho
0
 
LVL 117

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) earned 100 total points
ID: 36720197
if will give you multipathing and redundancy.
0
 
LVL 37

Assisted Solution

by:Neil Russell
Neil Russell earned 100 total points
ID: 36720210
Multipathing being the big advantage
0
 
LVL 3

Accepted Solution

by:
shahravish earned 250 total points
ID: 36815531
It would definately be beneficial to run them on 2 seperate switches and subnets! This gives you full mesh design for multipathing and redundancy and protects you from single point of failures.
Taking the following components - SAN ( 2 X Controller + 2 X Ports), 2 Switches, 2 NICS per host
C= Controller, P = Port, S = Switch, H = Host

C1P1 -> S1P1
C1P2 -> S2P1
C2P1 -> S2P2
C2P2 -> S1P2

H1P1 -> S1P3
H1P2 -> S2P3
H2P1 -> S2P4
H2P2 -> S1P4

This would give you protection against (and I know  many say this is unlikely) but if you had a controller failure and the opposite switch failure, you would still have your paths active and access to SAN available. Certain SAN devices however are not able to have different subnets defined in a single controller, so it may be worth checking, But since you mentioned HP, I am confident it has that support. We deploy mostly HP SAN's and configure the same way.


Adding a switch to the mix also provides you scalability to add more hosts in the future. But mainly, wqith only 1 host, you still have 4 paths. If you connect directly, you will only have 2 paths, where if 1 controller failed, and the second nic failed, you have no SAN access.

Hope this helped. If you have any questions, do let me know

Thanks
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Join & Write a Comment

HOW TO: Install and Configure VMware vSphere Hypervisor 6.5 (ESXi 6.5), Step by Step Tutorial with screenshots. From Download, Checking Media, to Completed Installation.
In this step by step tutorial with screenshots, we will show you HOW TO: Enable SSH Remote Access on a VMware vSphere Hypervisor 6.5 (ESXi 6.5). This is important if you need to enable SSH remote access for additional troubleshooting of the ESXi hos…
Teach the user how to use vSphere Update Manager to update the VMware Tools and virtual machine hardware version Open vSphere Client: Review manual processes for updating VMware Tools and virtual hardware versions: Create a new baseline group in vSp…
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now