系统为centos7.7
通过ppp拨号可以正常上网
[root@qiy~]# lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
|__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 1: Dev 2, If 1, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 1: Dev 2, If 2, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 1: Dev 2, If 3, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 1: Dev 2, If 4, Class=Vendor Specific Class, Driver=qmi_wwan, 480M
|__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
每次拨号都卡在这里
[06-05_15:10:20:509] busybox udhcpc -f -n -q -t 5 -i wwp0s21u1i4
udhcpc: started, v1.31.0
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
[06-05_15:10:35:573] /usr/share/udhcpc/default.script: Lease failed:
udhcpc: no lease, failing
换成dhcpd也不行
另外尝试更改成ECM模式,识别出的网卡一直是down的,也无法通过dhcp获取地址