Bug ID 2258717: /etc/nsswitch.conf will be missing myhostname on upgrade

Last Modified: Mar 27, 2026

Affected Product(s):
BIG-IP Install/Upgrade, TMOS(all modules)

Known Affected Versions:
14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 14.1.4.5, 14.1.4.6, 14.1.5, 14.1.5.1, 14.1.5.2, 14.1.5.3, 14.1.5.4, 14.1.5.6

Opened: Mar 26, 2026

Severity: 4-Minor

Symptoms

File /etc/nsswitch.conf will not have myhostname in hosts: cat /etc/nsswitch.conf|grep ^hosts; hosts: files dns

Impact

DNS resolution for device will not show the current hostname

Conditions

When upgrading from an unsupported version 14.x or possibly earlier

Workaround

Manually add myhostname to the file cat /etc/nsswitch.conf|grep ^hosts; hosts: files dns myhostname

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips