2 nics on same subnet failing validation

We have an equilogic SAN, which is connected to 2 Switches.

Our blades have 3 nics, 1 connected to the production network (172.*), and the other two going to the SAN Vlan (192.*).

However I'm having an issue getting cluster validation to pass. It is reporting that it has detected two nics on the same subnet....which is obviously the case as they are both connected to the SAN for redundancy. I've read that I shouldnt TEAM the nics as this isnt supported with iSCSI, so I'm not quite sure what I am doing wrong and why validation is reporting this as an issue.

Can anyone advise?

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A.Rajesh Khanna

Hi,

It's one of the new validation checks.

You can't have more than one NIC on the same subnet.

Understanding Cluster Validation Tests: Network

You may need to reconfigure your SAN networking/MPIO.

Thank you for your reply.

Could you just clarify. In our case where we have a SAN, and two NICs for the SAN, how should we configure the NICs? They obviously have to be on the same subnet to talk to the SAN, and we cant TEAM them?

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A.Rajesh Khanna

Hi,

Hereis what we do, NIC1 on Public Network, NIC2 on Storage Network 1, NIC3 on Storage Network 2 all have diffferent VLANS and Differnet IP subnets

then configure MPIO for the two storage NICs,

yoru iscsi storage host shoudl also have to NICs in it and each of them on different subnets/vlans fo that MPIO and clusterin works correctly

Hi,

Thanks for reply WPJB, thats answer my question! Can I just expand on it slightly.... our equilogic SAN has 3 nics. Would I be right in thinking we should connect 2 of them to one switch/VLAN, and one to the other?

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A.Rajesh Khanna

Hi,

typically iSCSI san I work with have 3-8 NICs

1 to 2 NIC on each controller dedicated to Management, i.e web ui to configure the SAN

1-2 NIC per controller to attach to VLAN's for storage access,

so a typical deployment would use 3 vlans.

VLAN x1 for Managment highly secured
VLAN x2 for Storage VLAN1
VLAN x3 for StorageVLAN2

with most installes there is 2 NIC attached to VLANx1 for Management and the share an IP for fail over
then there is 1 NIC form each controller attached to each storage VLAN and then the clients run MPIO for redundancey to the storage accrross 2 switches.

soi ther is typicall 2 switches involved