![]() If anyone at Cisco wants to work with me on a joint KB saying “don’t use a FEX for vSAN/HCI in 2019” please reach out to me! Before anyone accuses me of not liking Cisco, I’ll say I’m a big fan of the C36180YC-R (ultra deep buffers RAWR!), and have seen some amazing performance out of this switch recently when paired with Intel Optane.īeyond the FEX, I’ve written some neutral switch guidance on buffers on our official blog. ![]() The reality is there are politics to getting a KB written saying “not to use something”, and it would require cooperation from the switch vendors. While vSAN does not currently have a switch HCL (Watch this space!) I have written some guidance specifically about FEXs on this personal blog. Should I use a Nexus 2000K (or other low performing network switch) with vSAN? Note these solutions all use vSAN and avoid the VSA problem and have done the engineering work to make things play nice. The only exception to using SDDC manager with external lifecycle tooling tools are select vendor LCM solutions that done customization and interop (Examples include VxRAIL Manager, the Redfish to HPE Synergy integration, and packaged VCF appliance solutions like UCP-RS and VxRACK SDDC). You’ll have issues with SDDC Manager not understanding the state of the hosts, but also coordination of non-ESXi elements (NSX perhaps using a VIB) would also be problematic. The issue comes in, running multiple host patching systems is a “very bad idea” (TM). What about if I use the VSA’s external lifecycle management to patch ESXi? ![]() If there is a virtual machine on the host that can not be powered off or moved, this will cause lifecycle to fail. This process is triggered when a host is placed into maintenance mode and DRS carefully vMotions VMs off of the host. In order to patch a host, all running virtual machines must be removed. ![]() The issue is that SDDC Manager automates upgrade and patch management. This one has come up quite a lot recently with some partners, and storage vendors who use VSA’s (A virtual machine that locally consumes storage to replicate it) incorrectly claiming this is supported. ![]() How do I use VMware Cloud Foundation (VCF) with a VSA/Virtual Machine that can not be vMotion’d to another host? There are a host of reasons why this may or may not be documented but here is my monthly list of “No/That is a bad idea (TM)!”. I’ll often fire back a simple “No” and then we get into a discussion about why VMware does not have a KB for this specific corner case or situation. Peanut Butter is Not Supported with vSphere/Storage Networking/vSAN/VCFįrom time to time I get oddball questions where someone asks about how to do something that is not supported or a bad idea. ![]()
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