RE: Cisco Catalyst WS-C3850-48P-S V02 BOOT LOOP PROBLEM

forremull2009 · ‎03-29-2016

Hi All,

I 've got a 3850 48 port POE switch, that is a continuous boot loop. Even when I hold down the mode button and go into switch: mode and try and boot off a USB stick the same thing happens. I have tried reformatting the switch flash:/deleting/renaming internal files it keeps saying it is a 'Read only file system' and doesn't allow me to do it. I have even tried altering the file systems privileges, but to no avail??

Any ideas please !! , calling all experts out there

G

johnlloyd_13 · ‎03-29-2016

hi,

is this a new switch?

could you post the whole bootup output?

forremull2009 · ‎03-29-2016

Hi johnlloyd_13

Thanks for responding so quickly. Please see below, an excerpt from PuTTy

----------------------------------------------------------------------------------------------------------------------------------

Bootable image at @ ram:0x6042f350
Bootable image segment 0 address range [0x81100000, 0x82140000] is in range [0x8 0180000, 0x90000000].
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@boot_syst em: 380
Loading Linux kernel with entry point 0x8166a600 ...
Bootloader: Done loading app on core_mask: 0xf

### Launching Linux Kernel (flags = 0x5)

IP-Config: Unable to set interface netmask (-22).
All packages are Digitally Signed
Starting System Services
Mar 29 07:16:06 %IOSXE-3-PLATFORM: process kernel: IP-Config: Unable to set interface netmask (-22).

FIPS(NGWC): Flash Key Check : Begin
FIPS(NGWC): Flash Key Check : End, Not Found, FIPS Mode Not Enabled
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: ERROR PEMX_INT_SUM(0)[SE]: System Error, RC Mode Only.
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: (cfg_sys_err_rc)
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: ERROR PEMX_DBG_INFO(0)[ACTO]: A Completion Timeout Occured
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: pedc_radm_cpl_timeout
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: ERROR PEMX_INT_SUM(0)[SE]: System Error, RC Mode Only.
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: (cfg_sys_err_rc)
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: ERROR PEMX_DBG_INFO(0)[ACTO]: A Completion Timeout Occured
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: pedc_radm_cpl_timeout
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: ERROR PEMX_INT_SUM(0)[SE]: System Error, RC Mode Only.
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: (cfg_sys_err_rc)
Mar 29 07:17:35 %IOSXE-3-PLATFORM: process kernel: ERROR PEMX_

Booting...Initializing and Testing RAM ++++@@@@####...################################++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@done.
Memory Test Pass!

Base ethernet MAC Address: f8:4f:57:56:eb:00

Interface GE 0 link down***ERROR: PHY link is down
Initializing Flash...

flashfs[7]: 0 files, 1 directories
flashfs[7]: 0 orphaned files, 0 orphaned directories
flashfs[7]: Total bytes: 6784000
flashfs[7]: Bytes used: 1024
flashfs[7]: Bytes available: 6782976
flashfs[7]: flashfs fsck took 1 seconds....done Initializing Flash.
Getting rest of image
Reading full image into memory....done
Reading full base package into memory...: done = 82665136
Nova Bundle Image
--------------------------------------
Kernel Address    : 0x6042d350
Kernel Size       : 0x418a9b/4295323
Initramfs Address : 0x60845dec
Initramfs Size    : 0xe780c3/15171779
Compression Format: .mzip

Bootable image at @ ram:0x6042d350
Bootable image segment 0 address range [0x81100000, 0x82140000] is in range [0x80180000, 0x90000000].
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@boot_system: 380
Loading Linux kernel with entry point 0x8166a600 ...
Bootloader: Done loading app on core_mask: 0xf

### Launching Linux Kernel (flags = 0x5)

IP-Config: Unable to set interface netmask (-22).
All packages are Digitally Signed
Starting System Services
Mar 29 07:20:36 %IOSXE-3-PLATFORM: process kernel: IP-Config: Unable to set interface netmask (-22).

FIPS(NGWC): Flash Key Check : Begin
FIPS(NGWC): Flash Key Check : End, Not Found, FIPS Mode Not Enabled

<Tue Mar 29 07:22:54 2016> Message from sysmgr: Reason Code:[2] Reset Reason:Service [fed] pid:[5686] terminated abnormally [6].
Details:
--------
Service: fed
Description: Forwarding Engine Driver
Executable: /tmp/sw/mount/cat3k_caa-platform.SPA.03.06.04.E.pkg//usr/binos/bin/fed

Started at Tue Mar 29 07:21:32 2016 (574765 us)
Stopped at Tue Mar 29 07:22:54 2016 (579530 us)
Uptime: 1 minutes 22 seconds

Start type: SRV_OPTION_RESTART_STATELESS (23)
Death reason: SYSMGR_DEATH_REASON_FAILURE_SIGNAL (2)
Last heartbeat 0.00 secs ago

PID: 5686
Exit code: signal 6

CWD: /var/sysmgr/work

PID: 5686
UUID: 3005
Unmounting ng3k filesystems...
Unmounted /dev/sda3...
Warning! - some ng3k filesystems may not have unmounted cleanly...
Please stand by while rebooting the system...
Restarting system.

Booting...Initializing and Testing RAM ++++@@@@####...################################++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@++@@done.
Memory Test Pass!

Base ethernet MAC Address: f8:4f:57:56:eb:00

acampbell · ‎03-29-2016

Hi G,

This looks like a failure after an upgrade to 03.06.04.E
May be the package in your flash is corrupt.

Try reverting the switch back to the p[revious version.

Allow the switch to fail with the continious loop
After 5 attempts it should go to rommon.

from switch: (rommon prompt)

Switch:copy flash: flash:
Source filename []? packages.conf
Destination filename [packages.conf]? packages.conf.fail

(Allow copy to complete)

Switch:copy flash: flash:
Source filename []? packages.conf.00-
Destination filename [packages.conf]? packages.conf

(Allow copy to complete)

Now try to boot from rommon

switch: boot flash:packages.conf

Hopefully this will load your previous IOS/XE version

Regards
Alex

Regards, Alex. Please rate useful posts.

johnlloyd_13 · ‎03-29-2016

hi,

try alex's suggestion and re-download the IOS just to make sure it's not corrupted. if it still fails, raise a TAC case to replace the switch.