Introduction to NFS and software iSCSI storage multipathing in vsphere

Vsphere supports storage multipath selection for NFS and iSCSI, which are explained in detail in the following two ways.
first, the multipath approach to NFS is described, and NFS is a multi-path IP-based network, although he can do link aggregation through LACP, but he is only a shunt technology, not the bandwidth overlay, and the premise must be in a one-to-many, or many case, the reason is that vsphere only supports the IP hash based load balancing, it is the source and destination IP address to do with or operation, if it is a one-to-two, then its calculated results will only fixed selection of a link, The other link at this point acts as a redundant link only.

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Second, it is a multipath approach to software iSCSI, unlike the hardware iSCSI initiator as the HBA card as the storage adapter, and using the NMP and PSP paths of the STAP option, the software iSCSI Initiator requires some additional configuration to use the vsphere storage MPIO stack. And under Default software iSCSI uses IP network multipathing. The host can fail over using a set of network cards, but the initiator can only provide one terminal, so there is no load balancing function. In order to use the store NMP and turn on load balancing between network cards, port binding is used. Port binding requires 2 independent links and does not do link aggregation, and there are 2 vmkernel interfaces, if 2 NICs share a vmkernel (such as), the port can not be bound

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So we need to create another vmkernel.

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2 Vmkernel can use the same virtual switch, but it is important to note that each vmkernel in its failover option needs to set another Vmkernel NIC to unused

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At this point, you can select the bound port by entering the soft iSCSI port binding option.

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As shown in the final results, there is no iSCSI storage in the actual environment of the small series, so the path status is shown as unused

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This article from "Rabbit-like rabbit sen Broken" blog, please be sure to keep this source http://arkling.blog.51cto.com/2844506/1751789

Introduction to NFS and software iSCSI storage multipathing in vsphere