The following configuration comes out from the use that you're forced to do on the Windows hosts.
MS iSCSI initiator does not support and work with teamed nics, so if your host have two nics you will have to create two differente subnets (is not suggested to have two nics on the same subnet also changing the binding order) and to do it on the same couple of switches you will have to create a VLAN for iSCSI. In this way you will configure DSM/MPIO to use the 'active' path on the iSCSI VLAN and the 'passive' on the adapter normally used to other traffic: after all you need also CIFS for SnapDrive LUN creation/managing purposes.
On the filer side we've a 3020 so you have 4 nics. In my opinion and experience you can create two vif: one for iSCSI and the other one for other traffic putting the two couple of nics on different switches using an 'm' or 'l' (if Data Ontap is 7.2.4) vif if switches support this, plugging one nic to a switch and the second of the same vif to the other switch; otherwise you will be forced to create an 's' vif. Then you can configure both vif fori SCSI traffic but the 'active' path will be always the one coming on the iSCSI VLAN, involving the let's call CIFS path, only in case of some failure on the iSCSI involved nics.
Againg, using 4 nics on the 3020 for mixed communications you can create two 'm' vifs and then create a 'super' vif type 's' that couples the two 'm', always plugging the nics on different switches, exactly what you'd do in a FC SAN.
Regards
-----Messaggio originale----- Da: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] Per conto di Jon Hill Inviato: domenica 9 marzo 2008 18.27 A: netapp.filer@gmail.com; toasters@mathworks.com Oggetto: RE: iscsi, mpio of multiple connections with a single head
I don't recommend setting up the filer NICs as a vif. We tried that initially and had beaucoup performance problems. Instead give each NIC its own IP. Unless you have a really good reason not to, connect each NIC to a separate switch.
On the client, give each NIC a separate IP and set up MPIO to connect each NIC to both filer IPs. If possible put all iSCSI NICs (filer & client) on a separate VLAN.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of netapp.filer@gmail.com Sent: Sunday, March 09, 2008 11:10 AM To: toasters@mathworks.com Subject: iscsi, mpio of multiple connections with a single head
Hi,
I was wondering what the opinions are regaring setting up iscsi and MPIO.
I have the following setup:
Windows 2003 host, two nics for iSCSI, MS iSCSI initiator, Snapdrive 5.0
Two Network switches
Netapp FAS3020 single head, with 2 nics for iSCSI (should I set this up as a vif?)
How should I set up the IP adresses on the host, should I use a single vif on the filer?
I have searched on the NOW site but there are no guides for this configuration, all config guides only discuss HA (Clustered filers) configurations