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14137
June 11th, 2009 08:00
Multiple VLANs?
Should each of the two subnets have its own VLAN on the switch?
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puneetdhawan
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June 11th, 2009 09:00
Dev_Mgr
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June 11th, 2009 12:00
Using 2 VLANs on the same switch would protect against one of these, but not the switch failure.
I'd suggest 2 VLANs where each VLAN is on a different switch (or if you're using a core-switch, put each VLAN on a different blade in the switch so you can replace a whole blade without losing complete SAN connectivity).
GeneNZ1
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October 6th, 2009 15:00
We have an identical configuration as described in this article. However, we have two MD3000i's, both configured in the same way as the article, utilising the same two switches. These switches have been dedicated for iSCSI traffic.
Initially I had both MD3000i's setup on the same iSCSI subnets utilising different IP addresses. Dell support has suggested best practice is to separate the iSCSI traffic of both MD3000i's on their own VLAN's and subnets if utilising the same switches. i.e, There would be a total of 4 iSCSI VLANs, two on each switch, instead of the 2 native iSCSI VLAN's currently being used. Firstly, I want to double check that this is indeed a best practise.
Secondly, as the switch ports (we will be using Cisco 2960's) will be configured for access ports and not trunkports, is there any need to specify the VLAN in the VNic Config? That is, the VMKernel configuration has a field to specify the VLAN, presumably for cases where iSCSI traffic will be used across trunking ports so it can tag the traffic. Since we're not using any form of trunking, would it be safe to exclude the VLAN ID from the VMKernel configuration?
Thanks in advance.
Gene