Fujitsu PLAN EM 4× 1 Gbit/s RJ45 OCP Interface Card, DynamicLoM for PRIMERGY RX2530 / RX2540 / RX4770 M4 and M5 Servers

The Fujitsu S26361-F3953-L401 (PLAN EM 4x 1Gb T OCP interface) is the DynamicLoM interface card that gives selected Fujitsu PRIMERGY M4 and M5 rack servers four 1 Gbit/s RJ45 network ports through the server's dedicated OCP slot — for server owners and IT providers adding, replacing or upgrading on-board LAN connectivity.

It is not a standalone network card with its own chip: Fujitsu describes it as an interface card that provides the external connectors for the on-board LAN, which is driven by the Intel C624 (Lewisburg) chipset on the server mainboard. That is why it only works in PRIMERGY systems designed for Fujitsu's DynamicLoM OCP cards.

• Fujitsu PLAN EM 4x 1Gb T OCP interface card (S26361-F3953-L401)
• Packaging details are not published by Fujitsu for the L-type spare — no cables included

• Four Gigabit RJ45 ports at the rear of the server without using a PCIe slot, so your PCIe slots stay free for RAID, HBA or 10/25G cards.
• Because the LAN controller is on the mainboard, the ports appear as Intel on-board LAN in the operating system and use the standard chipset LAN drivers.
• Typical use: separate management, backup and VM traffic, or team ports for redundancy, on a two-socket PRIMERGY rack server.
• The L-suffix part is the upgrade/spare version of the factory option S26361-F3953-E401.

• Will not work in a PCIe slot or in any non-Fujitsu server.
• Not for PRIMERGY M6 and later generations, which use OCP 3.0 cards (e.g. PY-LA274U).
• Not an Intel I350 or other PCIe NIC — it has no controller of its own and cannot be used in servers without Lewisburg on-board LAN.
• No SFP/fibre and no 10 Gbit/s ports — for 10G choose a 10GBASE-T or SFP+ OCP/PCIe card.