Bug ID 524300: The MOS boot process appears to hang.

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8

Fixed In:
12.0.0, 11.6.1, 11.5.4

Opened: May 20, 2015
Severity: 3-Major
Related AskF5 Article:
K71003856

Symptoms

When a BIG-IP 2000 series or BIG-IP 4000 series device is booted into MOS (either manually or as a result of a user running the image2disk utility), the MOS boot process appears to hang. In reality, MOS boots successfully, but loses its connection to the BIG-IP system's serial console.

Impact

If you booted into MOS manually, you cannot carry out the tasks that you had set out to do. You must reset the device (either physically or via the AOM menu) to recover it. If the system booted into MOS automatically (as a result of a user running the image2disk utility to perform a clean installation), the installation completes successfully and the system reboots correctly at the end of the installation. However, you cannot see and follow the re-imaging process because of this issue. In this case, you can watch the (seemingly hung) serial console until the system reboots by itself.

Conditions

A BIG-IP 2000 series or BIG-IP 4000 series device with a MOS version older than 2.8.9 - 587.0 is booted from MOS.

Workaround

You can work around this issue by performing a temporary installation of BIG-IP version 12.0.0 to a new boot slot. No further action is required. This temporary installation of BIG-IP version 12.0.0 can be deleted once completed. This temporary installation of version 12.0.0 has the effect of upgrading MOS to a version which resolves this issue.

Fix Information

A BIG-IP 2000 series or BIG-IP 4000 series device with a MOS version older than 2.8.9 - 587.0 is booted from MOS now retains its connection to the serial console.

Behavior Change