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The configured hostname is overwritten by dhclient after upgrade.
Incorrect hostname assigned to the BIG-IP system.
-- DHCP enabled. -- Custom hostname configured using the procedure described in K45728203: AWS generates the BIG-IP VE instance host name to include the host name's private IP address :: https://support.f5.com/csp/article/K45728203, instead of using the one provided by the DHCP server.
Change the DHCP settings, and issue the following command to correct the name without losing connectivity to management: # tmsh modify sys global-settings mgmt-dhcp disabled; tmsh modify sys global-settings mgmt-dhcp enabled
Disable and reenable dhclient to fix the dhclient overwritten hostname after upgrade when 'sys management-dhcp' does not contain the 'host-name' in the request-options.
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