Link is Down|Link is Up

光纤模块质量较差，链路不稳定导致网卡频繁Down|Up

 grep -E "Link is Down|Link is Up" -r /var/log/
/var/log/anaconda/syslog:14:39:48,639 INFO kernel:i40e 0000:08:00.0 eth0: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/anaconda/syslog:14:39:48,923 INFO kernel:i40e 0000:08:00.1 eth1: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/anaconda/journal.log:Nov 27 14:39:48 localhost kernel: i40e 0000:08:00.0 eth0: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/anaconda/journal.log:Nov 27 14:39:48 localhost kernel: i40e 0000:08:00.1 eth1: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/dmesg.old:[    2.249276] i40e 0000:08:00.0 eth0: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/dmesg.old:[    2.397895] i40e 0000:08:00.1 eth1: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/dmesg:[    2.218219] i40e 0000:08:00.0 eth0: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages-20221106:Oct 30 08:55:42 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages-20221106:Oct 30 08:55:42 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 20 19:40:51 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 20 19:40:51 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 22 17:41:03 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 22 17:41:03 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 23 20:39:51 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 23 20:39:52 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 24 17:42:54 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 24 17:42:54 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 24 19:34:09 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 24 19:34:09 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 25 00:54:48 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 25 00:54:48 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None
/var/log/messages:Nov 25 01:07:07 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
/var/log/messages:Nov 25 01:07:08 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Up, 10 Gbps Full Duplex, Flow Control: None






[root@node3 ~]#  grep  'Link is Down' -r /var/log/messages | grep -v grep
Nov 20 19:40:51 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
Nov 22 17:41:03 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
Nov 23 20:39:51 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
Nov 24 17:42:54 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
Nov 24 19:34:09 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
Nov 25 00:54:48 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down
Nov 25 01:07:07 node3 kernel: i40e 0000:08:00.1 eno2: NIC Link is Down