请问下V3S的以太网不稳定,总是自己断开又连上,如此往复怎么回事?

[wonrowl]

Welcome to Lichee Pi
Lichee login: [ 9.607480] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 11.686963] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 12.727054] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 14.806976] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 17.927112] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 20.006955] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 21.047089] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 10Mbps/Full - flow control rx/tx
[ 39.766917] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 41.847051] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 43.926921] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 46.007037] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 48.086925] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 49.127050] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 51.206916] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 52.247043] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 54.326916] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 55.367050] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 57.446927] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 61.607049] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 10Mbps/Full - flow control rx/tx
[ 64.726916] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 65.767047] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 67.846919] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 69.927042] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 72.006920] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 73.047057] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 75.126918] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 76.167046] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 78.246911] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 81.367037] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 83.446918] dwmac-sun8i 1c30000.ethernet eth0: Link is Down
[ 84.487049] dwmac-sun8i 1c30000.ethernet eth0: Link is Up - 10Mbps/Full - flow control rx/tx

这是终端打印的,且一直在重复,请问怎么回事?????