HP Z series workstation hardware specification VS physical hardware & drivers

[workless]

I am hoping that someone can determine if I have incorrect drivers running on my system.
There are two RJ-45 connections on the rear panel - but only one is functional.
The HP specification seems to state that there should be two functioning RJ-45s.
The system is reporting a chip that is only a ?single? port (82574L).
If anyone can explain to me whether a driver update will enable the second RJ-45 - I'd apperciate it.
I can't quite figure out if installing the 82579LM driver for Linux will actually enable the second port.
HP spec sheets (below) offer conflicting info about which controller is actually on board.
{ 82574 ~ 82579 ~ 82574L ~ 82579LM }

Thanks to anyone who can provide an accurate answer.

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HP SUPPORT COMMUNICATION- PRODUCT CHANGE NOTIFICATION:

https://support.hp.com/in-en/document/c04050028
The following components have been updated:
Intel 82574L Gigabit Network Connection Driver version 12.7.27.0 or later
Intel 82579LM Gigabit Network Connection Driver version 12.6.45.0 or later

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Intel Specs:

Intel® 82574L and 82574IT Gigabit Ethernet ControllersLow-Power, Small-Footprint, Single-Port Gigabit Network Connectivity with Advanced Performance Features
https://www.intel.com/content/www/us/en/embedded/products/networking/82574l-gbe-controller-datasheet...
https://www.intel.com/content/www/us/en/embedded/products/networking/82574l-82574it-gbe-controller-b...

Intel® 82579LM Corporate LAN product with support for Intel® vPro™ technology, Intel® AMT2, Energy Efficient Ethernet (802.3AZ)1, MACsec (802.1ae)3, Intel® SIPP, iSCSI Boot, Server OS support
https://www.intel.com/content/www/us/en/embedded/products/networking/82579-gigabit-ethernet-connecti...

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Intel seems to have a driver that is for Linux systems and designed for the 82574 & 82579:

https://downloadcenter.intel.com/download/15817/Intel-Network-Adapter-Driver-for-PCIe-Intel-Gigabit-...

e1000e.x.x.x.tar.gz is designed to work with the:
     Intel® 82563/82566/82567 Gigabit Ethernet PHY
     Intel® 82571/82572/82573/82574/82577/82578/82579/82583 Gigabit Ethernet Controller
     I217/I218 controllers under Linux*

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Ran this command in ubuntu to determine what driver is installed:

ubuntu:~$ hardinfo
     Ethernet controller:     Intel Corporation 82574L Gigabit Network Connection

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HP Spec Sheet #1: [Product Features > Rear I/O]
https://support.hp.com/us-en/product/hp-z820-workstation/5225041/model/5225043/document/c03271150

     Rear I/O:      2 RJ-45 to integrated Gigabit LAN
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HP Spec Sheet #2: [PAGE 17]
http://www8.hp.com/h20195/v2/GetPDF.aspx/c04111526.pdf

Networking and Communications:
                                                                                                                                         Factory Configured

• Integrated Intel 82579LM PCIe GbE Controller            Y
• Broadcom NetXtreme Gigabit Ethernet Plus NIC (PCIe)         Y
• HP X520 10GbE Dual Port Adapter                                                Y
• HP10GbE SFP+ SR Transceiver                                                        Y
• HP 361T PCIe Dual Port Gigabit NIC                                               Y
• Intel Ethernet I210-T1 PCIe                                                                Y

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Spec Sheet #2 [PAGE 67]
http://www8.hp.com/h20195/v2/GetPDF.aspx/c04111526.pdf

Network Controller:

• Integrated Intel 82579 and 82574 Controllers
• Memory Integrated 48KB receive buffer and 8KB transmit buffer
• Data rates supported 10/100/1000 Mb/s
• Compliance IEEE 802.3, 802.3AB and 802.3u compliant, 802.3x flow control
• Bus architecture PCIe 1.0a
• Data path width X1 to each controller
• Data path speed 2.5 Gb/s per direction transfer rate
• Data transfer mode Bus-master DMA
• Power requirement 1.0 watts @ +3.3V AUX supply
• Boot ROM support Yes
• Network transfer rate 10BASE-T (half-duplex) 10 Mb/s
• 10BASE-T (full-duplex) 20 Mb/s
• 100BASE-TX (half-duplex) 100 Mb/s
• 100BASE-TX (full-duplex) 200 Mb/s
• 1000BASE-T (full-duplex) 2000 Mb/s
• Management capabilities: WOL, PXE 2.1, DASH 1.1, Intel AMT/vPro Technology

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