I've been thinking about using preferred networks. But obviously it doesn't work. Well, i'm not 100% sure how to set this up.
We've added a seperate "vMotion" network, we just called it like this and set the VMKernel to vMotion for this network. But Veeam doesn't recognize this, probably because the backup server doesn't have a connection to this network. It's just between ESXi hosts.
I'm still at about 40-50 MB/s. No improvements so far.
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Veeam Vanguard / VMCE v9 / VMTSP v9 / VMSP v9
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MCP / MCSA 2012
Personal blog: https://www.driftar.ch