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December 10th, 2013 18:00
Setup redundant iSCSI network with 2 network switches
Hi guys,
I'm rethinking the topology of our SAN. We have:
- 1 Dell PowerVault MD3000i SAN.
- 2 Cisco switches (supported by Dell).
- 2 Dell PowerEdge 710 servers.
I'm looking to connect the MD3000i with the PowerEdge servers through the switches in order to provide redundancy if any ethernet port or switch fails. So... I want to configure the iSCSI ports as shown in the following table:
C0 I0 = 192.168.1.10 (connected to switch 1)
C0 I1 = 192.168.1.11 (connected to switch 2)
C1 I0 = 192.168.1.12 (connected to switch 1)
C1 I1 = 192.168.1.13 (connected to switch 2)
Each switch will be configured as a non-stacked switched because I plan to use different IP addresses for each ethernet port.
PowerEdge servers has 4 ethernet ports each one, but we only use 2 and 2.
PowerEdge Server 1 - Port 1: 192.168.1.20 (connected to switch 1)
PowerEdge Server 1 - Port 2: 192.168.1.21 (connected to switch 2)
PowerEdge Server 2 - Port 1: 192.168.1.22 (connected to switch 1)
PowerEdge Server 2 - Port2: 192.168.1.23 (connected to switch 2)
At the iSCSI Initiator tool I will configure one target to two MCS (one connected to switch 1 and the other one to switch 2).
I want to know if this configuration works as I need. Any help will be appreciated.
Thanks in advance,
Pablo.
DELL-Sam L
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December 11th, 2013 12:00
Hello Pablo,
You can setup the ports on the MD3000i in the same subnet. We recommend that you don’t put all ports in the same vlan so that MPIO will failover properly and so that you won’t have a performance impact.so for your setup I would suggest 2 different subnets for each controller. Now if I was setting this up in my network I would set it up like so : C0 P0 192.168.1.10, C0 P1 192.168.2.10, C1 P0 192.168.1.11, C1 P1 192.168.2.11.
Please let us know if you have any other questions.
DELL-Sam L
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December 11th, 2013 08:00
Hello Pablo,
Here is a link to the deployment guide for a MD3200i. I know that you state that you have a MD3000i & the setup is mostly the same for a MD3000i & MD3200i. ftp://ftp.dell.com/Manuals/Common/powervault-md3200i_Deployment%20Guide_en-us.pdf Now if you look on page 49 it explains how we recommend that you setup your MD.
Please let us know if you have any other questions.
pabloafain
7 Posts
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December 11th, 2013 09:00
Hi Sam! Thanks for your answer.
This deployment guide is what I need, but I have one more question:
In the example, each ethernet port of SAN controller has one different subnet IP (192.168.130.x, 192.168.131.x).
Can I set up the same subnet for all ethernet ports? I'm planning to use two switches totally isolated from the rest of the network, so I think I can use the same subnet to easily manage connections and sessions.
Keep in touch,
Pablo.
pabloafain
7 Posts
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December 11th, 2013 13:00
Sam, thanks for your help! Five stars! ;)
pabloafain
7 Posts
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May 28th, 2014 06:00
Hey there,
I'm moving forward with this project and started the setup. Just to remember, I have the following infrastructure:
- 1 Dell PowerVault MD3000i SAN.
- 2 Cisco switches (supported by Dell).
- 2 Dell PowerEdge 710 servers.
The iSCSI ports on the SAN are configured as shown in the following table:
C0 I0 = 10.10.21.1 (connected to switch 1)
C0 I1 = 10.10.22.1 (connected to switch 2)
C1 I0 = 10.10.21.2 (connected to switch 1)
C1 I1 = 10.10.22.2 (connected to switch 2)
Each switch will be configured as a non-stacked switched because I plan to use different IP addresses for each ethernet port. PowerEdge servers has 4 ethernet ports each one, but we only use 2 and 2.
PowerEdge Server 1 - Port 1: 10.10.21.11 (connected to switch 1)
PowerEdge Server 1 - Port 2: 10.10.22.11 (connected to switch 2)
PowerEdge Server 2 - Port 1: 10.10.21.12 (connected to switch 1)
PowerEdge Server 2 - Port2: 10.10.22.12 (connected to switch 2)
I want to provide redundancy at the server port/switch level and RAID controller level. What's the best method to configure Microsoft iSCSI initiatior in order to achieve the high availability if one switch or RAID controller has failed?
Option A: One session with four connections, in a failover or round robin fashion.
Option B: Two sessions, each one with two connections to the same RAID controller through different switch, in a round robin fashion.
I'm not sure what will happenn if a RAID controller of the MD3000i fails. All IOPS will be routing trought the order controller?
Thanks in advance,
Pablo.