Home » VMware » VCP550D » What condition would result in this behavior?
A vSphere administrator enables and configures a Software iSCSI Initiator, and configures an iSCSI vmkernel portgroup with Port Binding. The SAN administrator creates a few LUNs on an iSCSI server. However, when the vSphere administrator adds the IP address of the iSCSI server in the Dynamic Discovery list, no iSCSI targets are detected.
What condition would result in this behavior?
A. The iSCSI vmkernel portgroup and the iSCSI server are on different subnets.
B. The iSCSI server IP address should be entered in the Static Discovery instead of Dynamic Discovery list.
C. The network card bound to the iSCSI portgroup is 1Gbps Ethernet instead of 10Gbps.
D. A Software iSCSI Initiator cannot use Port Binding in conjunction with Dynamic Discovery.
Correct Answer: A
Explanation/Reference:
Explanation:
A: An iSCSI Initiator is a system, such as a server that attaches to an IP network and initiates requests and receives responses from an iSCSI target. An iSCSI driver transports blocks of commands over an IP network and an iSCSI target can be any device that receives these command. This means that the target IP address must be configured on the appropriate port on the adapter/driver of the Initiator. Thus if no iSCSI targets are detected it can be assumed that the iSCSI vmkernel portgroup and the iSCSI server are on different subnets because the targets cannot be detected.
Incorrect Answers:
B: Dynamic Discovery and Static Discovery of the IP address is not the cause of the problem rather it is the LUN that is on a different subnet.
C: The Ethernet speed capabilities will not affect the server not to see a target.
D: To be seen as a target by the iSCSI server both the Initiator and the LUN’s should be on the same IP subnet. Port binding is not the issue here and neither is Dynamic Discovery of IP addresses.
References:
http://www.techrepublic.com/blog/how-do-i/how-do-i-install-configure-and-use-microsofts-iscsi-initiator/
https://technet.microsoft.com/en-us/library/ee338474%28v=ws.10%29.aspx
