toaster-0 and toaster-1 are 2 different host names that will resolve to 2 different IP addresses.  They can be in the same subnet or different subnets.  If your VIFs are on the same filer and subnet and you wish to have your clients talk to them specifically, they have to resolve to 2 different names.  This can be done by host files on your client or by DNS entries.

From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Romeo Theriault
Sent: Thursday, April 01, 2010 5:47 AM
To: Funke, Stefan
Cc: toasters@mathworks.com
Subject: Re: routing issue with 2 vifs on same subnet?

Hi, Thanks for the response. 

On Thu, Apr 1, 2010 at 6:21 PM, Funke, Stefan <Stefan.Funke@netapp.com> wrote:

It should work fine, but as long as you have two active links within the same subnet, it’s totally random which path will be used, since the destination is visible over multiple links.

You may be correct, but I didn't think this was the case, especially since I read this in the 7.3.2 Network Management Guide:

Balance NFS traffic on network interfaces
You can attach multiple interfaces on your storage system to the same physical network to balance network traffic among different interfaces.
For example, if two Ethernet interfaces on a storage system named toaster are attached to the same network where four NFS clients reside, specify in the /etc/fstab file on client1 and client2 that these clients mount from toaster-0:/home. Specify in the /etc/fstab file on client3 and client4 that these clients mount from toaster-1:/home. This scheme can balance the traffic among interfaces if all clients generate about the same amount of traffic.
Your storage system always responds to an NFS request by sending a reply using the interface over which the request was received.

Thoughts?

Romeo