Testing Jumbo Frame Support on ESXi

You will need to SSH into the host to perform these commands. This is the basic syntax vmkping -4 -d -I <vmk-number> -s <packet-size> <address> This is an example using vmk3 and vmk4, which we will assume is used for storage. We will use a packet size of 8400 bytes (can’t use 9000 b/c there won’t be enough room to allow for IP overhead) We will assume is the address of the storage interface vmkping -4 -d -I vmk3 -s 8400 192.
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Backing Up Host Configuration using PowerCLI

An often overlooked and less prioritized thought in vSphere environments is backing up the actual host configuration. I figured it was worth a quick post, given the fact that it’s a fairly simple process via PowerCLI. This command should be the same for all versions of vSphere/PowerCLI, but I have only tested on 4.1-5.1. Aside: This is just the basic command; there are plenty of other ways to automate this or use it in conjunction with another PowerCLI script; I’ll leave that up to you.
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