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
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
Jon Hill wrote:
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.
Btw, what's the best way to configure fault tolerant networking with NFS? I guess the MPIO-style multipathing is not possible, so is it two lacp vif's (same switch) configured as single mode vif (separate switches)?
IIR, you cannot do LACP inside a Single-Mode-VIF.
If you decide to use a SMV to two different switches to encapsulate a depper level VIF, then it must be a simple Multi-Mode-VIF.
On Sun, Mar 9, 2008 at 4:04 PM, Eino Tuominen eino@utu.fi wrote:
Jon Hill wrote:
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.
Btw, what's the best way to configure fault tolerant networking with NFS? I guess the MPIO-style multipathing is not possible, so is it two lacp vif's (same switch) configured as single mode vif (separate switches)?
-- Eino Tuominen
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
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
I concur, I always set clients up with VIFs and Super-VIFs and have never run into performance problems; perhaps the poster with the vif issues had problems at the switch layer, I've seen that....
Glenn (the other one)
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
We started with VIFs in which each NIC was on a separate switch. After lots of performance issues we talked to NTAP support, who told us we shouldn't be using VIFs on separate switches for iSCSI. I don't remember the details of the case very well, but it seemed our options were to set up the VIF on a single switch, thus introducing a SPOF, or to give each NIC its own IP and rely on MPIO on the client side. We opted for the latter solution and it's worked well for us for about a year now. However, the multi-level VIF you describe sounds like it should work if you have the available NICs.
We put our client NICs on the same subnet too, but we use iSCSI HBAs rather than onboard NICs.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
You can't/shouldn't do multi-mode (active/active) VIFs across multiple switches - you can/should do single-mode (active/passive) VIFs across multiple switches. Is this perhaps the issue?
We're quickly moving away from iSCSI HBAs given QLogic's direction to abandon them (so we've heard), and their issues with networking stack on the cards.
Glenn
-----Original Message----- From: Jon Hill [mailto:JHill@jennison.com] Sent: Monday, March 10, 2008 9:43 AM To: Glenn Walker; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We started with VIFs in which each NIC was on a separate switch. After lots of performance issues we talked to NTAP support, who told us we shouldn't be using VIFs on separate switches for iSCSI. I don't remember the details of the case very well, but it seemed our options were to set up the VIF on a single switch, thus introducing a SPOF, or to give each NIC its own IP and rely on MPIO on the client side. We opted for the latter solution and it's worked well for us for about a year now. However, the multi-level VIF you describe sounds like it should work if you have the available NICs.
We put our client NICs on the same subnet too, but we use iSCSI HBAs rather than onboard NICs.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
Yep, that was it. I'm not a networking guy, so I'll probably get some of the syntax wrong, but my understanding is that NTAP requires an Etherchannel between the two NICs being multi-mode VIFfed, which I'm told is only possible when the ports are on the same switch.
-----Original Message----- From: Glenn Walker [mailto:ggwalker@mindspring.com] Sent: Monday, March 10, 2008 6:26 PM To: Jon Hill; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
You can't/shouldn't do multi-mode (active/active) VIFs across multiple switches - you can/should do single-mode (active/passive) VIFs across multiple switches. Is this perhaps the issue?
We're quickly moving away from iSCSI HBAs given QLogic's direction to abandon them (so we've heard), and their issues with networking stack on the cards.
Glenn
-----Original Message----- From: Jon Hill [mailto:JHill@jennison.com] Sent: Monday, March 10, 2008 9:43 AM To: Glenn Walker; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We started with VIFs in which each NIC was on a separate switch. After lots of performance issues we talked to NTAP support, who told us we shouldn't be using VIFs on separate switches for iSCSI. I don't remember the details of the case very well, but it seemed our options were to set up the VIF on a single switch, thus introducing a SPOF, or to give each NIC its own IP and rely on MPIO on the client side. We opted for the latter solution and it's worked well for us for about a year now. However, the multi-level VIF you describe sounds like it should work if you have the available NICs.
We put our client NICs on the same subnet too, but we use iSCSI HBAs rather than onboard NICs.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
Multi-mode on a single switch isn't so much a netapp thing as a networking thing, but yes - that would cause some serious issues, more than likely.
You can achieve the same thing by doing what we and lots of others do: a multi-mode vif on one switch that is vif'ed together with a multi-mode vif on another switch. The net result is multiple interfaces on a single switch that act as one interface, with multiple interfaces in 'standby' mode on another switch to prevent outages due to switch failure. Works extremely well.
-----Original Message----- From: Jon Hill [mailto:JHill@jennison.com] Sent: Monday, March 10, 2008 6:53 PM To: Glenn Walker; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
Yep, that was it. I'm not a networking guy, so I'll probably get some of the syntax wrong, but my understanding is that NTAP requires an Etherchannel between the two NICs being multi-mode VIFfed, which I'm told is only possible when the ports are on the same switch.
-----Original Message----- From: Glenn Walker [mailto:ggwalker@mindspring.com] Sent: Monday, March 10, 2008 6:26 PM To: Jon Hill; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
You can't/shouldn't do multi-mode (active/active) VIFs across multiple switches - you can/should do single-mode (active/passive) VIFs across multiple switches. Is this perhaps the issue?
We're quickly moving away from iSCSI HBAs given QLogic's direction to abandon them (so we've heard), and their issues with networking stack on the cards.
Glenn
-----Original Message----- From: Jon Hill [mailto:JHill@jennison.com] Sent: Monday, March 10, 2008 9:43 AM To: Glenn Walker; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We started with VIFs in which each NIC was on a separate switch. After lots of performance issues we talked to NTAP support, who told us we shouldn't be using VIFs on separate switches for iSCSI. I don't remember the details of the case very well, but it seemed our options were to set up the VIF on a single switch, thus introducing a SPOF, or to give each NIC its own IP and rely on MPIO on the client side. We opted for the latter solution and it's worked well for us for about a year now. However, the multi-level VIF you describe sounds like it should work if you have the available NICs.
We put our client NICs on the same subnet too, but we use iSCSI HBAs rather than onboard NICs.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
Don't know what kind of switches you're using but I can demonstrate :-) that I'm using on a 3020 with (and since 7.0.4) two multi vif vif'ed together with a single supervif on two different 3Com 3870 with stacking cable and LACP, ST and RST enabled on those ports. In other words e0a and e0c create vif_ac multi with the two nics plugged on different switch, e0b and e0d create a vif_bd multi plugged in the same manner and vif_ac and vif_bd create main_vif single... I've tested to unplug everything with crossing tests, to power off one of the two switches and so on...and with 3Com you can loose in certain condition, just 3 or 4 pings...
Maybe some trouble here cames out using Cisco switches that create always several nightmares to create the right teaming? :-) (with 3Com are a couple of click on the web gui).
Bye,
-----Messaggio originale----- Da: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] Per conto di Glenn Walker Inviato: lunedì 10 marzo 2008 23.26 A: Jon Hill; netapp.filer@gmail.com; toasters@mathworks.com Oggetto: RE: iscsi, mpio of multiple connections with a single head
You can't/shouldn't do multi-mode (active/active) VIFs across multiple switches - you can/should do single-mode (active/passive) VIFs across multiple switches. Is this perhaps the issue?
We're quickly moving away from iSCSI HBAs given QLogic's direction to abandon them (so we've heard), and their issues with networking stack on the cards.
Glenn
-----Original Message----- From: Jon Hill [mailto:JHill@jennison.com] Sent: Monday, March 10, 2008 9:43 AM To: Glenn Walker; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We started with VIFs in which each NIC was on a separate switch. After lots of performance issues we talked to NTAP support, who told us we shouldn't be using VIFs on separate switches for iSCSI. I don't remember the details of the case very well, but it seemed our options were to set up the VIF on a single switch, thus introducing a SPOF, or to give each NIC its own IP and rely on MPIO on the client side. We opted for the latter solution and it's worked well for us for about a year now. However, the multi-level VIF you describe sounds like it should work if you have the available NICs.
We put our client NICs on the same subnet too, but we use iSCSI HBAs rather than onboard NICs.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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
Stack behaves like a single switch w.r.t. port aggregation. You can do multi vif on stacked Cisco as well without problems.
С уважением / With best regards / Mit freundlichen Grüβen
--- Andrey Borzenkov Senior system engineer -----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Milazzo Giacomo Sent: Wednesday, March 12, 2008 8:33 PM To: Glenn Walker; Jon Hill; netapp.filer@gmail.com; toasters@mathworks.com Subject: R: iscsi, mpio of multiple connections with a single head
Don't know what kind of switches you're using but I can demonstrate :-) that I'm using on a 3020 with (and since 7.0.4) two multi vif vif'ed together with a single supervif on two different 3Com 3870 with stacking cable and LACP, ST and RST enabled on those ports. In other words e0a and e0c create vif_ac multi with the two nics plugged on different switch, e0b and e0d create a vif_bd multi plugged in the same manner and vif_ac and vif_bd create main_vif single... I've tested to unplug everything with crossing tests, to power off one of the two switches and so on...and with 3Com you can loose in certain condition, just 3 or 4 pings...
Maybe some trouble here cames out using Cisco switches that create always several nightmares to create the right teaming? :-) (with 3Com are a couple of click on the web gui).
Bye,
-----Messaggio originale----- Da: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] Per conto di Glenn Walker Inviato: lunedì 10 marzo 2008 23.26 A: Jon Hill; netapp.filer@gmail.com; toasters@mathworks.com Oggetto: RE: iscsi, mpio of multiple connections with a single head
You can't/shouldn't do multi-mode (active/active) VIFs across multiple switches - you can/should do single-mode (active/passive) VIFs across multiple switches. Is this perhaps the issue?
We're quickly moving away from iSCSI HBAs given QLogic's direction to abandon them (so we've heard), and their issues with networking stack on the cards.
Glenn
-----Original Message----- From: Jon Hill [mailto:JHill@jennison.com] Sent: Monday, March 10, 2008 9:43 AM To: Glenn Walker; netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We started with VIFs in which each NIC was on a separate switch. After lots of performance issues we talked to NTAP support, who told us we shouldn't be using VIFs on separate switches for iSCSI. I don't remember the details of the case very well, but it seemed our options were to set up the VIF on a single switch, thus introducing a SPOF, or to give each NIC its own IP and rely on MPIO on the client side. We opted for the latter solution and it's worked well for us for about a year now. However, the multi-level VIF you describe sounds like it should work if you have the available NICs.
We put our client NICs on the same subnet too, but we use iSCSI HBAs rather than onboard NICs.
-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Glenn Walker Sent: Sunday, March 09, 2008 7:27 PM To: netapp.filer@gmail.com; toasters@mathworks.com Subject: RE: iscsi, mpio of multiple connections with a single head
We've been using VIFs exclusively for iSCSI. Not using a VIF could be problematic if the switch were to fail.
Our typical deployment is multi-level vif: 2 active connections as multi-mode vif, 2 passive connections as multi-mode vif, aggregate the 4 links together as single-mode vif.
As for iSCSI on the host, two separate NICs with separate IPs (we put them both on the same network).
Glenn
-----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 -- View this message in context: http://www.nabble.com/iscsi%2C-mpio-of-multiple-connections-with-a-singl e-head-tp15919171p15919171.html Sent from the Network Appliance - Toasters mailing list archive at Nabble.com.
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Borzenkov, Andrey -
Eino Tuominen -
Glenn Dekhayser -
Glenn Walker -
Jon Hill -
Milazzo Giacomo -
netapp.filer＠gmail.com -
tmac