embedded AP module on my Cisco C891FW-E-K9 will not boot regularly.

[markomit81]

Did erase nvram and rebooted the module once. Everything booted ok. Did that second time, got into this mode: AP7069.5af7.e832#

Have very annoying message pops out all the time:
Translating "CISCO-CAPWAP-CONTROLLER"...domain server (255.255.255.255)

sh log output command:

*Mar 1 00:00:24.179: %LWAPP-3-CLIENTERRORLOG: Load nvram:/lwapp_ap.cfg config failed, trying backup...
*Mar 1 00:00:24.259: %LWAPP-3-CLIENTERRORLOG: Load nvram:/lwapp_ap.cfg.bak config failed...
*Mar 1 00:00:24.259: %CAPWAP-3-EVENTLOG: No Config Present. PNP required
*Mar 1 00:00:24.283: validate_sha2_block:No SHA2 Block present on this AP.

Just want to go back to the regular mode, where I can edit the configuration in conf t mode.

[pieterh]

you probably run the Mobility express image , where you run a virtual wireless controller and the AP associates to this as if it is a lightwight AP.

when erasing the NVRAM you also erased the IP-address of the internal (virtual) wireless controller 

you need to give the controller an IP-address (either manual or DHCP) , then the AP can find it and associate

try the recovery steps described in this document

Solution

First, make sure that the AP IOS image was not booted and the device ended in rommon.

The easiest way to see this is by looking at the prompt presented after connecting to the AP803 console from the IR829's IOS:

To connect to the console of the AP803, first make sure you have an IP-address configured on the wlan-ap0 interface, then issue the following command:

IR829#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
IR829(config)#int wlan-ap0
The wlan-ap 0 interface is used for managing the embedded AP.
Please use the "service-module wlan-ap 0 session" command to console into the embedded AP
IR829(config-if)#ip addr 192.168.100.1 255.255.255.0
IR829(config-if)#end
IR829#service-module wlan-ap 0 session
Trying 192.168.100.1, 2004 ... Open

Connecting to AP console, enter Ctrl-^ followed by x,
then "disconnect" to return to router prompt

You are presented with one of these:

When the AP has the Unified image loaded.

AP2c5a.0f08.a4a8>

When the AP has the Autonomous image loaded.

ap>

When the AP is in rommon.

ap: