Solved

Separate network for iSCSI

Posted on 2010-08-18
5
804 Views
Last Modified: 2013-11-14
Hi Experts,

Have a question regarding setting up a iSCSI connection to a SAN from a Windows 2003/2008 server using MS iSCSI. We currently have it setup so that from the server one NIC connects to the main VLAN - 192.168.2.X and the other NIC connects to a SAN VLAN - 192.168.12.X

The SAN is connected to the same switch to which these NICs terminate. Is this the right way to set up the iSCSI connection or is there a better way? We don't notice too many issues on the network but if there were a better way to do it then we can try. We do have spare Cisco Catalyst 3560 lying around but we can't purchase a dedicated iSCSI HBA. Do we need to connect the SAN on a completely different switch with only NICs from the servers attached to it? If so how would routing work? We are not looking into redundancy currently but to see if speeds can be increased on the SAN. TIA
0
Comment
Question by:abhijitm00
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 8

Accepted Solution

by:
jimmyray7 earned 333 total points
ID: 33469748
The SAN should be on it's own segment.  Ideally a separate switch, at minimum, a separate VLAN.  With a dedicated switch you can do some iSCSI optimizations like jumbo frames, etc.  Speed increase would depend on the current switch's load, but it should be better.  A separate switch also makes troubleshooting easier, as you immediately know which network the problem stems from.
0
 

Author Comment

by:abhijitm00
ID: 33469945
Thanks for getting back Jimmy but how would you physically connect the cables. I would assume you would have a cable from the SAN (192.168.12.5) going to the Cisco switch. Another cable from the server's second NIC (192.168.12.6) going into it as well. How would they talk though. What would you put under the gateway for the server NIC? Also what configuration would need to go onto the switch? Please correct me if my assumptions are wrong. We are using Cisco Catalyst 3560G switches
0
 
LVL 8

Assisted Solution

by:jimmyray7
jimmyray7 earned 333 total points
ID: 33470051
NIC1 - data network- would plug into the existing switch.
NIC2 - SAN - would plug into the second switch (SAN only).

The two switches should be completely separate.  The SAN switch should be isolated without any connections anywhere else.

The data network config wouldn't change.  The SAN NIC shouldn't need a gateway, as there is no outside access.  Just an IP and subnet mask.

Let me see what I can dig up regarding the cisco iscsi config.
0
 

Author Comment

by:abhijitm00
ID: 33474539
Thanks Jimmy. So I would disconnect my SAN NIC from my server and plug into the new switch put in the IP and subnet and then another NIC from the SAN with IP and subnet connecting to this new switch. How would the new switch need to be configured in terms of IP and VLAN? Would I set it up with an IP address and subnet as well, would I need to add VLAN info or anything else you can think of? Again the servers would be using the MS iSCSI software initiator

I appreciate you looking up the cisco iscsi config.
0
 

Assisted Solution

by:johnemyers
johnemyers earned 167 total points
ID: 33764087
On the Iscsi Switch
1. enable PORT FAST on the switch ports. (Brings ports online quick and turns off STP)
2. Lable the ports with descriptions ( Server a, b , SAN A ,B )
3.  Optional   Setup a Management IP for inband management  ( If you have Vlans on network the management Vlan is allowed to all devices)
If no Management VLAN the console or direct cable to switch is the only way to manage the switch.


0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When we purchase storage, we typically are advertised storage of 500GB, 1TB, 2TB and so on. However, when you actually install it into your computer, your 500GB HDD will actually show up as 465GB. Why? It has to do with the way people and computers…
The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

687 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