Follow these cabling best practices when deploying a switchless interconnect. The Dell factory populates PCIe network adapters consistently, but the slot enumeration sequence depends on platform and riser configuration. PCIe slot identification is labeled on the chassis, and Port 1 and Port 2 are physically labeled on the PCIe NIC adapter bracket.
Note: PCIe riser orientation may change the port orientation on each network adapter. Therefore, some network adapters may have a physically reversed orientation depending on which PCIe slot the network adapter is installed. Be certain to check the orientation of Port 1 and Port 2 on each network adapter, as shown in the following figure.