RB750Gr3安装OpenWRT实例



备份license key

原系统的license key最好备份下,已备还原官方系统。 电脑连接路由器LAN口,用Winbox登录路由器,在system下找到license管理,将license export即可备份。

下载openwrt镜像

一共是俩

第一个是网络引导安装镜像,第二个是升级包

网络引导写入initramfs kernel

这里使用的工具是Tiny PXE,下载地址pxesrv.zip

下载后,编辑config.ini文件,在[dhcp]部分下添加rfc951=1参数

邮件管理员打开pxesrv.exe

  • 最上面默认为HTTPd
  • Option 54(DHCP Server)处,勾选当前固网IP(192.168.1.10)
  • 在Boot File中Filename后,选择openwrt-ramips-mt7621-mikrotik_rb750gr3-initramfs-kernel.bin文件
  • 将Boot File中Filename if use-class=gPXE or iPXE去掉勾选
  • 其余默认即可,点击右上角三个按钮中间的Online

将网线连接到路由器WAN口,断电,用卡针按住RES按钮,上电后观察USR灯,连闪三下后,再闪一下后熄灭马上放开RES按钮,此时路由器进入netboot模式

看到Tiny pxe窗口出现DoReadFile:openwrt-ramips-mt7621-mikrotik_rb750gr3-initramfs-kernel.bin即可,如下log:

14:10:50 ROOT=D:\\rb750\\
14:10:50 DHCPd 192.168.1.10:67 started...
14:10:50 TFPTd 192.168.1.10:69 started...
14:10:51 HTTPd:80 started...
14:11:27 DHCPd:DISCOVER received, MAC:64-D1-54-9F-79-0F, XID:9D74838A
14:11:28 DHCPd:OFFER sent, IP:192.168.1.11, XID:9D74838A
14:11:28 DHCPd:REQUEST received, MAC:64-D1-54-9F-79-0F, XID:9D74838A
14:11:28 DHCPd:ACK sent, IP:192.168.1.11, XID:9D74838A
14:12:01 DHCPd:REQUEST received, MAC:64-D1-54-9F-79-0F, XID:ECAC163F
14:12:01 DHCPd:BOOTP REQUEST
14:12:01 TFTPd:DoReadFile:openwrt-ramips-mt7621-mikrotik_rb750gr3-initramfs-kernel.bin B:1452 T:0
14:12:01 DHCPd:ACK sent, IP:192.168.1.21, XID:ECAC163F
14:12:19 DHCPd:DISCOVER received, MAC:64-D1-54-9F-79-11, XID:F919527A
14:12:19 DHCPd:OFFER sent, IP:192.168.1.12, XID:F919527A
14:12:19 DHCPd:REQUEST received, MAC:64-D1-54-9F-79-11, XID:F919527A
14:12:19 DHCPd:ACK sent, IP:192.168.1.12, XID:F919527A

此时initramfs kernel已经以RAM方式运行在路由器中,可以关闭Tiny PXE了

安装OpenWRT

将电脑通过网线连接路由器LAN口,ping一下192.168.1.1即可表示是否可以访问路由器,此时路由器还没有LUCI界面,无法使用web进行管理,我们需要通过SSH来刷入upgrade包。

下来通过scp将upgrade包发给路由器

$ scp openwrt-ramips-mt7621-mikrotik_rb750gr3-squashfs-sysupgrade.bin [email protected]:/root
openwrt-ramips-mt7621-mikrotik_rb750gr3-squas 100% 3457KB   3.9MB/s   00:00

然后SSH登录路由器,通过sysupgrade命令更新upgrade包

$ ssh [email protected]
BusyBox v1.30.0 () built-in shell (ash)
-----------------------------------------------------
OpenWrt SNAPSHOT, r9028-75fdf3b
-----------------------------------------------------
=== WARNING! =====================================
There is no root password defined on this device!
Use the \"passwd\" command to set up a new password
in order to prevent unauthorized SSH logins.
--------------------------------------------------
[email protected]:~# ls
luci_0.11.1-1_ar71xx.ipk
luci_git-19.011.54896-1f423b1-1_all.ipk
openwrt-ramips-mt7621-mikrotik_rb750gr3-squashfs-sysupgrade.bin
root
[email protected]:~# sysupgrade -v openwrt-ramips-mt7621-mikrotik_rb750gr3-squashfs-s
ysupgrade.bin
Image not in /tmp, copying...
Cannot save config while running from ramdisk.
Commencing upgrade. Closing all shell sessions.
Connection to 192.168.1.1 closed by remote host.
Connection to 192.168.1.1 closed.

路由器更新完成后会重启,等重启完成后再次登录192.168.1.1试试,已经完成OpenWRT刷入。

下来就是在SSH下安装luci了,推荐参OpenWRT通过SSH 安装LUCI

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