Jeremy Waldrop writes about the etherical and obscure mysteries of VIC PCI channels and vNIC/vHBA placement to optimize.
The new VIC 1340/1380s have two PCI channels (1 and 2) and you can control which specific channel the vNIC/vHBA is created on. This new configuration option is called “Admin Host Port” and by default is set to AUTO. With the AUTO setting UCS will round robin each vNIC/vHBA across both Admin Host Ports per vCon.
Read More! https://jeremywaldrop.wordpress.com/2016/02/15/ucs-vic-13401380-pci-placement/
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