Confusion between PCI and PCIE network adapter... 82574L Gigabit Network Connection

diablo046 · 08-25-2014, 02:42 AM

Hi all,

I know it is a very basic simple question, but I am not able to decide what is correct.
Well we have an IBM X3100 m4 server and centos 6.5 is installed. I want to know which lan card is installed in our server,so i used "lspci" command and got the following output...
06:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
0b:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
but here it is not mentioned whether these NICs are PCI or PCIE or PCIX..so how shall i confirm these cards are PCI or PCIE...kindly guide.Thank you..

MensaWater · 08-25-2014, 09:29 AM

Are you sure it is a separate adapter as opposed to ports embedded on the motherboard? The latter will show up in lspci output.

Typically if it is PCIE you'll see that in the output and also see PCI Express.

You can try "lspci -v" for more detail or "lspci -vvv" for full details.

suicidaleggroll · 08-25-2014, 10:03 AM

The 82574L ethernet controller uses a PCIe x1 interface:
http://www.intel.com/content/dam/doc...ller-brief.pdf

So my guess is it's either a PCIe card or it's built into the motherboard.

This is the output of one of my workstations with a SuperMicro X9SAE-V motherboard with two built-in gigabit NICs (no add-on card):

Code:

# lspci | grep -i ethernet
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection

jefro · 08-25-2014, 08:30 PM

This is the reason linux is moving to the BSD model of naming devices in slots. I would think that 6.5 has that naming already??
"
How To Test

If you don't have biosdevname installed and no explicit network interface configuration in /etc/sysconfig/network-scripts/, and did not install any udev rules that rename your interfaces for you, then your interfaces should now be named "eno1", "ens1", "enp2s0" or similar. "

Something like that maybe.

diablo046 · 08-26-2014, 12:09 AM

thank you for your reply....we have two nics installed on the server...i see in network scripts..its eth0 and eth1...ifconfig shows both these cards ipaddress,i also used lspci -v and lspci -vvv and output is---

06:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
Subsystem: IBM Device 03bd
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes

0b:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection
Subsystem: IBM Device 03bd
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes

but it is not shown they are pci or pcie...i guess they are PCIE cards as Mr.suicidaleggroll told...thank you guys..

MensaWater · 08-26-2014, 07:50 AM

Having two NICs (Network Interface Controllers) such as eth0 & eth1 does not mean you necessarily have two cards in slots (Host Bus Adapters/HBAs). An alternate meaning of NIC is Network Interface Card which implies HBAs but as noted that isn't always what you have. You might have one HBA with 2 ports or 4 ports or a combo HBA that has ethernet and something else such as fibre on it OR you might have NO HBAs that have anything to do with networking because the NIC ports are built into the mother board. Even when built into the mother board they usually are on the PCI bus but being on the bus does not immediately mean they are in slots. Many systems these days come with ethernet built into the mother board. Depending on your setup might ALSO have separate HBAs with additional network ports.

You might glean more information by running dmidecode. Also sometimes nothing beats just looking at the back of the server to see where the ports are.

Soadyheid · 08-26-2014, 09:49 AM

The easiest way to find out what's in the box is to Google the specs, see here for the PDF file.

It looks like the server has 4 x PCIe slots, from the PDF they're designated

Quote:

Four PCI Express slots:
Slot 1, PCIe 3.0 x8, full-height, half-length (PCIe 2.0 in models with processors

announced September 2011 - see Table 4)
Slot 2, PCIe 3.0 x16 (x8 wired), full-height, half-length (PCIe 2.0 in models with

processors announced September 2011 - see Table 4)
Slot 3, PCIe 2.0 x4, full-height, half-length

Slot 4, PCIe 2.0 x1, full-height, half-length

Hopefully that helps? Note that they're 8, 18, 4 and single channel slots; one of each.

But...the two that you mention are Dual Port integrated Gigabit nics on the Motherboard so not in effect PCI or PCIe

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