> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/smsc.4.md).

# smsc.4

`smsc` — USB Microchip LAN9xxx 快速以太网驱动

## 名称

`smsc`

## 概要

`要在引导时以模块形式加载此驱动，请将以下行添加到 loader.conf(5) 中：`

```sh
if_smsc_load="YES"
```

`或者，要将此驱动编译进内核，请将以下行添加到你的内核配置文件中：`

> device uhci device ohci device usb device miibus device uether device smsc

## 描述

`smsc` 设备驱动为基于 Microchip（前身为 SMSC）LAN9xxx 芯片组的 USB 快速以太网适配器提供支持。

有关配置此设备的更多信息，请参见 [ifconfig(8)](/man/man8/ifconfig.8.md)。

## 硬件

以下设备受 `smsc` 驱动支持：

* 基于 LAN9500、LAN9500A、LAN9505 和 LAN9505A 的以太网适配器
* 基于 LAN89530、LAN9530 和 LAN9730 的以太网适配器
* 带集成 USB 集线器的 LAN951x 以太网适配器

## 参见

arp(4), [intro(4)](/man/man4/intro.4.md), [miibus(4)](/man/man4/miibus.4.md), [netintro(4)](/man/man4/netintro.4.md), [usb(4)](https://github.com/FreeBSD-Ask/freebsd-man-sc/blob/main/man4/usb.4.md), [ifconfig(8)](/man/man8/ifconfig.8.md)

## 历史

`smsc` 设备驱动最早出现于 FreeBSD 10.0。

## 作者

`smsc` 驱动由 Ben Gray <bgray@FreeBSD.org> 编写。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://book.bsdcn.org/man/man4/smsc.4.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.