[ 4866.468548] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 4881.344047] eth0: no IPv6 routers present
[ 5888.171047] eth0: link down
[ 5903.236961] eth0: link up, 100Mbps, full-duplex, lpa 0x41E1
[ 5903.239368] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 5924.753374] eth0: no IPv6 routers present
[ 6624.136517] eth0: link down
[ 6633.165378] eth0: link up, 100Mbps, full-duplex, lpa 0x41E1
[ 6633.168168] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 6649.455897] eth0: no IPv6 routers present