---
name: "liquidio"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/liquidio"
---

# liquidio(4)

Cavium 10Gb/25Gb Ethernet driver

## NAME

**liquidio** – Cavium 10Gb/25Gb Ethernet driver

## SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:

**device lio**

Alternatively, to load the driver as a module at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
if_lio_load="YES"
```

## DESCRIPTION

The **liquidio** driver provides support for 23XX 10Gb/25Gb Ethernet adapters. The driver supports Jumbo Frames, Transmit/Receive checksum offload, TCP segmentation offload (TSO), Large Receive Offload (LRO), VLAN tag insertion/extraction, VLAN checksum offload, VLAN TSO, and Receive Side Steering (RSS)

Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the [ifconfig(8)](/ifconfig/8.md) utility configures the adapter to receive and transmit Jumbo Frames. The maximum MTU size for Jumbo Frames is 16000.

For more information on configuring this device, see [ifconfig(8)](/ifconfig/8.md).

## HARDWARE

The **liquidio** driver supports the following cards:

- LiquidIO II CN2350 210SV/225SV

- LiquidIO II CN2360 210SV/225SV

## LOADER TUNABLES

Tunables can be set at the [loader(8)](/loader/8.md) prompt before booting the kernel or stored in [loader.conf(5)](/loader.conf/5.md).

- *hw.lio.fw\_type*

  String that specifies type of firmware to be loaded. Default is "nic". Use "none" to load firmware from flash.

- *hw.lio.num\_queues\_per\_pf0*

  Unsigned integers that specify number of queues per PF0. Valid range is 0 to 64. Use 0 to derive autoconfigures based on the number of cpus with a max of 8

- *hw.lio.num\_queues\_per\_pf1*

  Unsigned integers that specify number of queues per PF1. Valid range is 0 to 64. Use 0 to derive autoconfigures based on the number of cpus with a max of 8

- *hw.lio.console\_bitmask*

  Bitmask indicating which consoles have debug output redirected to syslog.

- *hw.lio.rss*

  To enable/disable driver RSS support

- *hw.lio.hwlro*

  To enable/disable hardware LRO

## SUPPORT

For general information and support, go to the Cavium support website at: *http://support.cavium.com*.

## SEE ALSO

[altq(4)](/altq/4.md), [arp(4)](/arp/4.md), [netintro(4)](/netintro/4.md), [ng\_ether(4)](/ng_ether/4.md), [vlan(4)](/vlan/4.md), [ifconfig(8)](/ifconfig/8.md)

## HISTORY

The **liquidio** device driver first appeared in FreeBSD 12.0.

## AUTHORS

The **liquidio** driver was written by Derek Chickles ⟨*derek.chickles@cavium.com*⟩.