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vlan and ports for vmware

Posted on 2011-02-21
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Last Modified: 2012-05-11
Hi Experts,
I have a vsphere system running and noe I need to configure the SAN stack and the vlans.
How to setup the vlans in my LAN switches ?
How to setup the SAN stack with the port configuration ?
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Question by:Eprs_Admin
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Expert Comment

by:bgoering
ID: 34943269
I would need a bit more info about what kind of switches, SAN, etc. you are implementing
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by:bgoering
ID: 34943275
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by:nappy_d
ID: 34943438
Are you presenting iSCSI LUNs or Fibre?

It would also be best to create a vLAN that will only be used for iSCSI traffic.
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Author Comment

by:Eprs_Admin
ID: 34944461
we are using iscsi and we have to seperate stacked iscsi switches.
The network should be seperate from lan.

How to setup the vlan on my LAN switch ?
How to setup the SAN stack ?
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Expert Comment

by:nappy_d
ID: 34944538
What SAN d you have?

What switch manufacturer do you have?

Are you the network admin for the switches?
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Expert Comment

by:bgoering
ID: 34945572
Yes - again we will need more detail before we can help much. What kind of switch - cisco, hp, dell, something else? Same info on iSCSI - understand it is a separate stack, but what kind of switch? Does it support jumbo frames? Will you be trunking multiple NICs or do you have some kind of hardware HBA for iSCSI. Need all that detail in order to help.
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Author Comment

by:Eprs_Admin
ID: 34945751
oh sorry I forget.
We are using for the SAN stack, the CISCO 3750G switches.
And the SAN is an Equallogic from Dell, the PS4000.
I will use multiple nics to configure also a redundancy.


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Expert Comment

by:bgoering
ID: 34945799
Well that is a start - the article to the vmware kb I posted above has instructions for configuraing an ether channel on a cisco switch. You need to create the ether channel and assign vlans to it, also assign the vlans to whatever ports you multiple nics will plug into, then assign those ports to the ether channel.

A good optimization for iSCSI is jumbo frames, the 3750g will support that, but you have to make sure your nics and your storage also supports it. Try to get it running with normal 1500 MTU first, then can try jumbo frames later.

On the vmware side create your vswitch and assign the nics to it. Create a vmkernel port for iSCSI. Set you nics for active / standby if you are only looking for reduncancy.
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bgoering earned 500 total points
ID: 34945829
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Author Comment

by:Eprs_Admin
ID: 34949375
ok I will check this
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Author Comment

by:Eprs_Admin
ID: 34959958
ok the vlans and ports are done.
But now I have a question regarding jumbo frames.
Can I use MTU 9000 on the SAN stack ?
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Expert Comment

by:bgoering
ID: 34960152
Yes, provided the switch, san device, and nic in your server all support it. It has to be enabled everywhere on the particular network or vlan where you wish to use it.
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Author Comment

by:Eprs_Admin
ID: 34960870
do you mean  the physical nics ?
Now we set it to the vswitches and the sanstack and the SAN.
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Expert Comment

by:bgoering
ID: 34966508
I guess one other thing to consider is that if this is the free edition I don't believe that jumbo frames are supported in ESXi - at least it wasn't on 4.0. (http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1012454)

However if you have a fully licensed version (Essentials or higher) see http://jibbysununix.blogspot.com/2010/06/enabling-jumbo-frames-om-esxi-through.html for the process.

And yes - I meant the physical NICs, however if you have a server class Gigabit NIC I would pretty much bet it is supported. If not you may need to do some research to find out.
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Author Closing Comment

by:Eprs_Admin
ID: 34991733
it is a very general answer and explaination.
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