3850 poe+ switch problem with IOS need to load new ios flash read-only mode

KHAJA FAZLE USMANI · ‎03-10-2017

hi,

Having problem booting 3850 switch, trying to load IOS from switch: prompt. says flash: file system is read-only. how can i load IOS on this.

This switch was part of the stack of 4.

Pls. help

Diana Karolina Rojas · ‎03-10-2017

Hello,

You can do a Hard Update from the rommon mode taking the file from a TFTP server, you have to use the following commands:

rommon 3 > set 
    PS1=rommon ! > 
    IP_ADDRESS=172.18.16.76 (the ip you want to configure on your switch to reach the tftp)
    IP_SUBNET_MASK=255.255.255.192 
    DEFAULT_GATEWAY=172.18.16.65 (If you connect the TFTP direct to the switch so you have to write here the TFTP ip)
    TFTP_SERVER=172.18.16.2 (tftp ip address)
    TFTP_FILE=quake/rel22_Jan_16/c2600-i-mz (IOS name)

Take into acount that all the configuration will be lost.

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Regards,

KHAJA FAZLE USMANI · ‎03-10-2017

Hi,

This is 3850, it is going into "switch:" (i think, ROMMON mode in 3850)

switch:

switch: set

ABNORMAL_RESET_COUNT=0

AUTOREBOOT_RESTORE=1

BOOT=flash:packages.conf

BSI=0

BYPASS_STARTUP_CONFIG=1

CFG_MODEL_NUM=WS-C3850-48F-E

CLEI_CODE_NUMBER=IPMW700ARB

DEFAULT_ROUTER=192.0.2.122

ECI_CODE_NUMBER=466864

IP_ADDR=192.0.2.123/255.255.255.0

LINUX_COREMASK=15

MAC_ADDR=88:90:8D:71:9F:00

MANUAL_BOOT=yes

MODEL_NUM=WS-C3850-48P

MODEL_REVISION_NUM=S0

MOTHERBOARD_ASSEMBLY_NUM=73-14442-10

MOTHERBOARD_REVISION_NUM=A0

MOTHERBOARD_SERIAL_NUM=FOC19126A4E

POE1_ASSEMBLY_NUM=73-14095-01

POE1_REVISION_NUM=B0

POE1_SERIAL_NUM=FOC191160L8

POE2_ASSEMBLY_NUM=73-14095-01

POE2_REVISION_NUM=B0

POE2_SERIAL_NUM=FOC191160L1

RANDOM_NUM=1572356125

RECOVERY_BUNDLE=sda9:cat3k_caa-recovery.bin

STKPWR_ASSEMBLY_NUM=73-11956-08

STKPWR_REVISION_NUM=B0

STKPWR_SERIAL_NUM=FOC191200AJ

SWITCH_NUMBER=4

SWITCH_PRIORITY=12

SYSTEM_SERIAL_NUM=FCW1912C16E

TAN_NUM=800-37564-03

TAN_REVISION_NUMBER=B0

TEMPLATE=advanced

TERMLINES=0

USB_ASSEMBLY_NUM=73-12923-05

USB_REVISION_NUM=C0

USB_SERIAL_NUM=FOC19122U1Z

VERSION_ID=V04

switch: copy tftp://192.0.2.122/cat3k_caa-universalk9.SPA.03.07.01.E.152-3.E1.bin flash:

flash:cat3k_caa-universalk9.SPA.03.07.01.E.152-3.E1.bin: read only file system

above is the output of set. flash is giving read only file system. how can we make it read write file system

switch: dir

List of filesystems currently registered:

xmodem[0]: (read-only)
null[1]: (read-write)
bs[3]: (read-only)
flash[18]: (read-only)
usbflash0[19]: (read-write)
tftp[20]: (read-write)

switch:

Diana Karolina Rojas · ‎03-10-2017

Ok, try to recover the switch using this command:

switch: emergency-install tftp://192.168.1.2/cat3k_caa-universalk9.SPA.03.06.05.E.152-2.E5.bin

Tell me the result when you do this.

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Regards,

KHAJA FAZLE USMANI · ‎03-10-2017

Hi,

at the beginning tried emergency-install but still not loading the IOS. seems flash is set to read only mode. unable to format also.

KHAJA FAZLE USMANI · ‎03-10-2017

switch: dir

List of filesystems currently registered:

xmodem[0]: (read-only)
null[1]: (read-write)
bs[3]: (read-only)
flash[18]: (read-only)
usbflash0[19]: (read-write)
tftp[20]: (read-write)

switch:

brian0613m · ‎02-28-2018

Try with the IOS in a USB an also use the commands