3g 调制解调器无法在不重启的情况下被识别为以太网设备

2024-6-15 • tag-icon

我有两台 CentOS5 服务器，内核版本为 3.4.52，配有华为 e353 usb 3g 调制解调器。当我将调制解调器插入服务器时，usb_modeswitch 运行，我可以ifconfig -a在正常工作的服务器上使用命令将调制解调器视为以太网设备。但其他服务器无法正常工作。插入调制解调器设备后，我看不到任何以太网。

所有服务器都有相同版本的usb_modeswitchrpm。

跑步前usb_modeswitch

 working properly                     not working properly
 # lsusb | grep 12d1                  # lsusb | grep 12d1
 Bus 001 Device 005: ID 12d1:1f01     Bus 001 Device 005: ID 12d1:1f01`

跑步后usb_modeswitch

 working properly                     not working properly
 # lsusb | grep 12d1                  # lsusb | grep 12d1
 Bus 001 Device 005: ID 12d1:14db     Bus 001 Device 005: ID 12d1:14db

 # rpm -qa | grep modesw              # rpm -qa | grep modesw
 usb_modeswitch-data-20130610-1.lbr   usb_modeswitch-data-20130610-1.lbr
 usb_modeswitch-1.2.6-2               usb_modeswitch-1.2.6-2`

用 diff 比较了两个服务器的 /etc/udev 目录，但没有任何区别

关于服务器无法正常工作，有一件有趣的事情。在插入 USB 3G 调制解调器的情况下重新启动服务器后，调制解调器正常工作，我可以使用命令将其视为以太网设备ifconfig -a。因此，我认为如果我可以重新加载 udev，我将把调制解调器视为以太网设备，因此我运行以下命令：

/sbin/udevcontrol reload_rules
/sbin/start_udev

但这并没有解决问题。而且我还认为这两台服务器可能使用了不同的内核参数。所以我比较了sysctl -a每台服务器上的输出。

 # diff config_workingProperly config_notWorkingProperly -y 

CONFIG_TREE_PREEMPT_RCU=y                    | CONFIG_TREE_RCU=y
CONFIG_PREEMPT_RCU=y                         | # CONFIG_PREEMPT_RCU is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set   | CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
# CONFIG_INLINE_READ_UNLOCK is not set       | CONFIG_INLINE_READ_UNLOCK=y
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set   | CONFIG_INLINE_READ_UNLOCK_IRQ=y
# CONFIG_INLINE_WRITE_UNLOCK is not set      | CONFIG_INLINE_WRITE_UNLOCK=y
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set  | CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
# CONFIG_PREEMPT_NONE is not set             | CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT=y                             | # CONFIG_PREEMPT is not set
# CONFIG_BLK_DEV_FD is not set               | CONFIG_BLK_DEV_FD=m
# CONFIG_IDE_GD is not set                   | CONFIG_IDE_GD=m
# CONFIG_BLK_DEV_IDECD is not set            | CONFIG_IDE_GD_ATA=y
# CONFIG_BLK_DEV_SR_VENDOR is not set        | CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_JFS_FS=m                              | # CONFIG_JFS_FS is not set
# CONFIG_CUSE is not set                     | CONFIG_CUSE=y
CONFIG_ISO9660_FS=m                          | CONFIG_ISO9660_FS=y
CONFIG_UDF_FS=m                              | CONFIG_UDF_FS=y
CONFIG_FAT_FS=m                              | CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=m                            | CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=m                             | CONFIG_VFAT_FS=y
CONFIG_SQUASHFS=m                            | CONFIG_SQUASHFS=y
# CONFIG_SQUASHFS_XATTR is not set           | CONFIG_SQUASHFS_XATTR=y
# CONFIG_SQUASHFS_LZO is not set             | CONFIG_SQUASHFS_LZO=y
# CONFIG_SQUASHFS_XZ is not set              | CONFIG_SQUASHFS_XZ=y
CONFIG_CRC_ITU_T=m                           | CONFIG_CRC_ITU_T=y
# CONFIG_RCU_BOOST is not set                <
CONFIG_UNINLINE_SPIN_UNLOCK=y                <
CONFIG_PREEMPT_COUNT=y                       <
CONFIG_JFS_POSIX_ACL=y                       <
CONFIG_JFS_SECURITY=y                        <
# CONFIG_JFS_DEBUG is not set                <
CONFIG_JFS_STATISTICS=y                      <
CONFIG_DEBUG_PREEMPT=y                       <
CONFIG_RCU_CPU_STALL_VERBOSE=y               <
# CONFIG_PREEMPT_TRACER is not set           <
                                             > CONFIG_OPTPROBES=y
                                             > CONFIG_IDE_ATAPI=y
                                             > # CONFIG_IDE_GD_ATAPI is not set
                                             > CONFIG_BLK_DEV_IDECD=m
                                             > CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS=y
                                             > # CONFIG_LEDS_TRIGGER_IDE_DISK is not set

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