Dennis HilkLinux diagnosticsDE

Ethernet & networking

Intel 700-series SFP function (1572)

This SFP identity belongs to the i40e 700-series family. Its source symbol uses XL710 wording, so the profile keeps a family label rather than asserting an exact retail X710 card model.

Editorial source review: Share public profileOpen in the identification tool
On this page
  1. Overview & identity
  2. Driver & binding
  3. Firmware
  4. Read-only diagnostics
  5. Limitations & related issues
  6. References

Overview & identity

1572 resolves to I40E_DEV_ID_SFP_XL710 and is in the physical-function table. X710, XL710 and OEM naming must be reconciled with subsystem IDs and actual adapter inventory.

Curated identifiers
pci 8086:1572

A numeric match establishes a candidate family within the reviewed evidence. Marketing names, board variants, subsystem conditions and successful operation remain separate questions.

Driver & binding

i40e is the candidate established by this table. The driver guide discusses the 700-series NVM/FW relationship and SFP/QSFP devices; a host firmware package does not identify the adapter NVM.

  • i40e — kernel driver/module candidate

Detected, bound, operational: learn the difference

Firmware

Device/revision dependent

Adapter NVM/FW is part of this family’s deployment context. No exact host-loaded filename is established here; use the actual adapter/OEM identity and the observed firmware-version.

Inspect firmware packaging on your distribution

Read-only diagnostics

Run one displayed command at a time. Replace uppercase placeholders with the affected device, interface or module from your own output. Commands are never executed here. Read-only output can still contain private identifiers.

Check the PCI function and bound driver

lspci -nnk -s BDF

Replace BDF with the domain:bus:device.function address. Look for [8086:1572] and Kernel driver in use. i40e in Kernel modules is only a candidate, not proof of binding.

Identify the network interface driver

ethtool -i INTERFACE

Replace INTERFACE with the real interface name. Driver and bus-info connect this interface to its device. A displayed firmware-version is adapter information; it does not prove a file was loaded. Candidate: i40e.

Compare supported modes with the current link

ethtool INTERFACE

Supported/advertised link modes describe capability or negotiation offers. Speed, Duplex and Link detected describe the current link, not measured throughput. An unsupported query is a limitation of the interface/driver.

Separate PCIe transport from Ethernet speed

sudo lspci -vv -s BDF

Elevated access may be needed. Root can expose the full PCI configuration. If PCIe capabilities exist, compare LnkCap with LnkSta: maximum and negotiated PCIe speed/width are different from Ethernet speed. Legacy PCI or virtual functions may omit these fields.

Limitations & related issues

A physical-function match does not imply a guest uses i40e; virtual functions have separate identities and drivers. This source review is not a tested driver/NVM compatibility matrix.

These guides are linked for relevant observations, not as known defects of every device in this family.

Choose a hardware diagnostic workflow · Inspect a log excerpt in Fix Lab

References

Source review records a checked implementation or document, not a reproduced hardware test. Version-specific tables do not establish a minimum kernel or guaranteed operation.