Recovering SOL after time zone change - Lenovo ThinkSystem SN550 (7X16)
Recovering SOL after time zone change - Lenovo ThinkSystem SN550 (7X16)
Recovering SOL after time zone change - Lenovo ThinkSystem SN550 (7X16)
Symptom
The network interface may be disconnected due to a system time change that affects the dhclient module.
Affected Configurations
The system may be any of the following Lenovo servers:
- ThinkSystem SN550, any model 7X16
The system is configured with at least one of the following:
- RHEL 7, See below for specific versions
This tip is not option specific.
The system has the symptom described above.
Note: This does not imply that the network operating system will work under all combinations of hardware and software.
Please see the compatibility page for more information:
http://www.lenovo.com/us/en/serverproven/
Solution
This is a permanent restriction, there will be no solution.
Workaround
To solve this issue, users will need to be able to access the host and try the following command for recovering:
1) The devices recognized by NetworkManager and their state:
$ nmcli device status DEVICE TYPE STATE CONNECTION ens3 ethernet connected my-office usb0 ethernet disconnected -- lo loopback unmanaged --
2) Reconnect the devices:
$ nmcli device connect usb0
The SoL (Serial Over LAN) will be available.
Additional Information
Refer to the Red Hat bugzilla 1093803 for reference.
https://bugzilla.redhat.com/show_bug.cgi?id=1093803
abstract: dhclient fails to renew IP address lease after system time changes