免JTAG直接更换CFE的方法
先刷新到 dd-wrt.v23_std_generic 开启SSH，winscp将cfe上传到TMP目录
telnet进dd-wrt,然后执行 cat /proc/mtd 查看cfe所在的区块，一般显示如下
mtd0: 00040000 00020000 “pmon”
mtd1: 007a0000 00020000 “linux”
mtd2: 002be6f4 00020000 “rootfs”
mtd3: 00020000 00020000 “nvram”
mtd4: 00400000 00020000 “ddwrt”
进入TMP目录 cd /tmp
dd if=/dev/mtd/0 of=/tmp/cfe.bin 备份CEF
执行 mtd write cfe.bin pmon 注意大小写
等待几秒，大功告成！
注意：一定要用V23的版本哦，附件为dd-wrtv23_generic下载！
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