MDS9000 Boot Loader Prompt Recovery

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Updated:August 17, 2018

Document ID:213567

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Introduction

Prerequisites

Requirements

Components Used

Switch Boot Up Sequence

Switch Prompt

Recovery Procedure

Introduction

This document describes how to recover a Multilayer Datacenter Switch (MDS) from Boot Loader Prompt and Boot Mode.

In order to function correctly, MDS switches require a valid non-corrupted Kickstart and System image to boot up completely. Invalid, corrupted or missing Kickstart images prevent a switch to boot up and stops at the Boot Loader Prompt. A switch with a valid Kickstart image, but an invalid or missing System Image ends up in Boot Mode.

Prerequisites

Requirements

Cisco recommends that you have a knowledge of these topics:

MDS9000 CLI configuration commands
How to set up a console connection to MDS switch.
How to set up or connect MDS switch to a network via its management port.
Familiarity with TFTP.

Components Used

Information in this document is based on the software requirement release 6.2(9) and later.

This document is using an MDS9148S switch, switchname tempest that supports 12 to 48 line-rate 16 Gbps Fibre Channel ports.

The information in this document was created from the devices in a specific lab environment. If your network is live, ensure that you understand the potential impact of any command.

Switch Boot Up Sequence

BIOS > Loader > Kickstart Image > System Image

The Basic Input Output System (BIOS) loads the Loader.
The Loader loads the Kickstart Image into RAM and starts the Kickstart Image.
The Kickstart Image loads and starts the System Image.
The System Image reads the Startup Configuration file.

Switch Prompt

Phase	Prompt	Description
BIOS	Non Bootable	BIOS begins the power on self test and memory test.
Loader	loader>	Boot loader uncompress loaded software to boot a kickstart image. Ctrl + C (Control Key and C Key) to enter boot loader prompt.
Kickstart	switch(boot)#	When the boot loader phase is over, press Ctrl + ] (Control key and Right Bracket key) to enter the boot mode.
System	login:	The system image loads the startup configuration file and returns a switch to login prompt.

Recovery Procedure

From switch console session.

loader>

Step 1. Download the switch’s Kickstart and System images, and put them into the TFTP server directory.

In this example, TFTP server IP address is 64.104.204.100.

Step 2. Configure the switch management IP address and its default gateway.

Configure the switch’s interface management IP address.

loader> net --ip=10.66.78.80

Configure the switch’s interface management subnet mask

loader> net --nm=255.255.255.128

Configure the switch’s default gateway IP address.

loader> net --gw=10.66.78.4

In this example :

The switch interface mgmt0 IP address is 10.66.78.80 255.255.255.128
The switch default gateway IP address is 10.66.78.4

Step 3. Test IP connectivity between TFTP server and the switch.

Ping the switch management IP address from the TFTP server.

C:\Users\mpandika> ping 10.66.78.80
 
Pinging 10.66.78.80 with 32 bytes of data:
Reply from 10.66.78.80: bytes=32 time=2ms TTL=60
Reply from 10.66.78.80: bytes=32 time=3ms TTL=60
Reply from 10.66.78.80: bytes=32 time=3ms TTL=60
Reply from 10.66.78.80: bytes=32 time=3ms TTL=60
 
Ping statistics for 10.66.78.80:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 2ms, Maximum = 3ms, Average = 2ms
 
C:\Users\mpandika>

Step 4. Boot the Kickstart image which is located in the TFTP server directory, in order to bring the switch to the boot mode.

loader> boot tftp://64.104.204.100/ m9100-s5ek9-kickstart-mz.8.3.1.bin 
eTSEC2: Speed 1000, full duplex
Using eTSEC2 device
TFTP from server 64.104.204.100; our IP address is 10.66.78.80; sending through gateway 10.66.78.4
Filename 'm9100-s5ek9-kickstart-mz.8.3.1.bin'.
Load address: 0x8000000
Loading:         *#################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################              
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #################################################################
                 #######
done
Bytes transferred = 26027008 (18d2400 hex)
 NBI at 08000000 size 26027008
 
Booting image at addr 0x00800000 ...
Memory <- <0x0 0x0 0x1 0x0> (4096MB)
ethernet0: local-mac-address <- 10:05:ca:b6:c5:a0
ethernet1: local-mac-address <- 00:e0:0c:00:01:fd
ethernet2: local-mac-address <- 00:e0:0c:00:02:fd
CPU clock-frequency <- 0x3f941f80 (1067MHz)
CPU timebase-frequency <- 0x3f941f8 (67MHz)
CPU bus-frequency <- 0x1fca0fc0 (533MHz)
 
zImage starting: loaded at 0x00800000 (sp: 0x7fedc620)
Allocating 0x620d88 bytes for kernel ...
gunzipping (0x00000000 <- 0x00817000:0x00de3838)...done 0x5bc060 bytes
Using loader supplied ramdisk at 0x2800000-0x3de8e00
initrd head: 0x1f8b0808
 
Linux/PowerPC load: rw root=/dev/ram0 rdbase=0x7000000 card_index=9046 maxcpus=2 ip=off ramdisk_size=262144 noquiet obfl_type_ide=1 kgdboc=ttyS0,9600,B console=ttyS0,9600n8nn loader_ver="02.01.17" card_index=9046 quiet bootdev=mgmt0 server_ip=64.104.204.100 ksimg=m9100-s5ek9-kickstart-mz.8.3.1.bin isanimg=  Finalizing device tree... flat tree at 0xdf0140
Ísetup_arch: bootmem
mpc85xx_ds_setup_arch()
arch: exit
            
[    0.060378] Host controller irq 26
[    0.103390] Assign root port irq 26
[    0.144046] Host controller irq 24
[    0.193691] Assign root port irq 24
[    0.810630] physmap-flash physmap-flash.0: Could not reserve memory region
[    1.084751] Enabling all PCI devices
INIT: Checking all filesystems..r.r.r.retval=[1]
r done
WARNING: Image sync is going to be disabled after a loader netboot.
Loading system software
No system image is specified
/etc/init.d/functions: li
INIT: Sending processes the KILL signal
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2018, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained in this software are
owned by other third parties and used and distributed under
license. Certain components of this software are licensed under
the GNU General Public License (GPL) version 2.0 or the GNU
Lesser General Public License (LGPL) Version 2.1. A copy of each
such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and
http://www.opensource.org/licenses/lgpl-2.1.php
switch(boot)#

Step 5. Recover the switch from the boot mode.

Configure the interface management IP address and default gateway IP address.

         switch(boot)# config t
         Enter configuration commands, one per line. End with CNTL/Z.
         switch(boot)(config)# interface mgmt 0
         switch(boot)(config-if)# ip address 10.66.78.80 255.255.255.128
         switch(boot)(config-if)# no shut
         switch(boot)(config-if)# exit
         switch(boot)(config)# ip default-gateway 10.66.78.4
         switch(boot)(config)# exit

Download the Kickstart and System images from the TFTP server to the switch’s bootflash.

        switch(boot)# copy tftp://64.104.204.100/m9100-s5ek9-kickstart-mz.8.3.1.bin bootflash:
 
Trying to connect to tftp server......
Connection to server Established. Copying Started.....
TFTP get operation was successful
Copy complete, now saving to disk (please wait)...
switch(boot)#
 
         switch(boot)#copy tftp://64.104.204.100/m9100-s5ek9-mz.8.3.1.bin bootflash:
 
Trying to connect to tftp server......
Connection to server Established. Copying Started.....
TFTP get operation was successful
Copy complete, now saving to disk (please wait)...
switch(boot)#

Verify the Kickstart and System images are successfully downloaded to the switch’s bootflash.

switch(boot)# dir bootflash:
             4096   Dec 22 2002 01:38:31  .partner/
               297  Nov 09 2017 07:18:54  MDS201711091818530370.lic
               297  Nov 09 2017 07:28:42  MDS201711091828418770.lic
              4096  Jul 23 2018 14:44:25  lost+found/
          26027008  Aug 08 2018 02:55:31  m9100-s5ek9-kickstart-mz.8.3.1.bin
         109635731  Aug 08 2018 02:53:38  m9100-s5ek9-mz.8.3.1.bin
           3430222  Feb 01 2000 02:31:30  moonlake.1.f.xsvf
             23467  Jul 30 2018 12:40:56  mts.log
            347607  Jul 28 2017 04:46:31  portchannel
              4096  Dec 22 2002 02:38:54  scripts/
             31812  Jun 30 2018 05:07:27  snmp.pcap
    
Usage for bootflash: filesystem
1264746496 bytes used
2106781696 bytes free
3371528192 bytes total
switch(boot)#

Load the System image.

switch(boot)# load bootflash:m9100-s5ek9-mz.8.3.1.bin
Uncompressing system image: bootflash:/m9100-s5ek9-mz.8.3.1.bin
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
Load plugins that defined in image conf: /isan/plugin_img/img.conf
No Patching support on this platform
Loading plugin 0: core_plugin...
No Patching support on this platform
Enter pboot_chk_compatibility
num srgs 1
0: swid-core-s5ek9m, swid-core-s5ek9m
num srgs 1
0: swid-sup-mini-ks, swid-sup-mini-ks
INIT: Switching to runlevel: 3
INIT: Sending processes the TERM signal
switch(boot)#
INIT:
 
 
2018 Aug  8 03:13:03  %SYSLOG-2-SYSTEM_MSG : Syslogs wont be logged into logflash until logflash is online
2018 Aug  8 03:13:06  %KERN-0-SYSTEM_MSG: [    1.084751] Enabling all PCI devices - kernel
2018 Aug  8 03:14:13 switch %CARDCLIENT-2-REG: OK
System is coming up ... Please wait ...
System is coming up ... Please wait ...
2018 Aug  8 03:14:22 switch %ASCII-CFG-2-CONFIG_REPLAY_STATUS: Bootstrap Replay Started.
System is coming up ... Please wait ...
 
 
 
 
User Access Verification
10.66.78.80 login: 2018 Aug  8 03:14:41 switch %ASCII-CFG-2-CONFIG_REPLAY_STATUS: Bootstrap Replay Done.
2018 Aug  8 03:14:44 switch %PMON-SLOT1-2-PMON_CRIT_INFO: Port Monitor Critical Information: Config download success .
2018 Aug  8 03:14:45 switch %ASCII-CFG-2-CONFIG_REPLAY_STATUS: Ascii Replay Started.
2018 Aug  8 03:14:45 switch %PMON-SLOT1-2-PMON_CRIT_INFO: Port Monitor Critical Information: Policy (slowdrain) activation is successfull .
2018 Aug  8 03:14:46 switch %PLATFORM-2-PS_OK: Power supply 1 ok(Serial number QCS18242L8D)
2018 Aug  8 03:14:46 switch %PLATFORM-2-PS_FANOK: Fan in Power supply 1 ok
2018 Aug  8 03:14:46 switch %PLATFORM-2-PS_FAIL: Power supply 2 failed or shut down(Serial number QCS18242L0H)
2018 Aug  8 03:14:46 switch %PLATFORM-2-FAN_OK: Fan module ok
2018 Aug  8 03:14:46 switch %PLATFORM-2-FAN_OK: Fan module ok
2018 Aug  8 03:14:46 switch %PLATFORM-2-FAN_OK: Fan module ok
2018 Aug  8 03:14:46 switch %PLATFORM-2-FAN_OK: Fan module ok
2018 Aug  8 14:15:35 tempest %ASCII-CFG-2-CONFIG_REPLAY_STATUS: Ascii Replay Done.
User Access Verification
tempest login:

Note: Switch was previously configured with switchname tempest.

tempest login: admin
Password:
Last login: Wed Aug  8 14:20:01 on pts/0
 
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2018, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained in this software are
owned by other third parties and used and distributed under
license. Certain components of this software are licensed under
the GNU General Public License (GPL) version 2.0 or the GNU
Lesser General Public License (LGPL) Version 2.1. A copy of each
such license is available at
http://www.opensource.org/licenses/gpl-2.0.php and
http://www.opensource.org/licenses/lgpl-2.1.php
tempest#

Verify the boot variables.

tempest# show boot
 
Current Boot Variables:
 
kickstart variable = bootflash:/m9100-s5ek9-kickstart-mz.8.1.1.bin
system variable = bootflash:/m9100-s5ek9-mz.8.1.1.bin
Boot POAP Disabled
No module boot variable set
 
Boot Variables on next reload:
 
kickstart variable = bootflash:/m9100-s5ek9-kickstart-mz.8.1.1.bin
system variable = bootflash:/m9100-s5ek9-mz.8.1.1.bin
Boot POAP Disabled
No module boot variable set
tempest#

Set the boot variables to the correct image.

tempest# show version
Cisco Nexus Operating System (NX-OS) Software
TAC support: http://www.cisco.com/tac
Documents: http://www.cisco.com/en/US/products/ps9372/tsd_products_support_serie
s_home.html
Copyright (c) 2002-2018, Cisco Systems, Inc. All rights reserved.
The copyrights to certain works contained herein are owned by
other third parties and are used and distributed under license.
Some parts of this software are covered under the GNU Public
License. A copy of the license is available at
http://www.gnu.org/licenses/gpl.html.
 
Software
  BIOS:      version 2.1.17
  loader:    version N/A
  kickstart: version 8.3(1)
  system:    version 8.3(1)
  BIOS compile time:       01/08/14
  system image file is:    bootflash:///m9100-s5ek9-mz.8.3.1.bin
  system compile time:     7/30/2018 12:00:00 [07/12/2018 19:32:46]
 
Hardware
  cisco MDS 9148S 16G 48 FC (1 Slot) Chassis ("2/4/8/16 Gbps FC/Supervisor")
  Motorola, e500v2 with 4088556 kB of memory.
  Processor Board ID JAE18250A8C
 
  Device name: tempest
  bootflash:    4018896 kB
 
Kernel uptime is 0 day(s), 0 hour(s), 47 minute(s), 44 second(s)
 
Last reset at 362296 usecs after Wed Aug  8 13:02:31 2018
  Reason: Reset Requested by CLI command reload
  System version: 8.1(1)
  Service:
 
plugin
  Core Plugin
 
 
tempest# config t
Enter configuration commands, one per line.  End with CNTL/Z.
tempest(config)# boot kickstart bootflash:m9100-s5ek9-kickstart-mz.8.3.1.bin
Performing image verification and compatibility check, please wait....
tempest(config)# boot system bootflash:m9100-s5ek9-mz.8.3.1.bin
Performing image verification and compatibility check, please wait....
 
 
tempest# show boot
Current Boot Variables:
 
kickstart variable = bootflash:/m9100-s5ek9-kickstart-mz.8.3.1.bin
system variable = bootflash:/m9100-s5ek9-mz.8.3.1.bin
Boot POAP Disabled
No module boot variable set
 
Boot Variables on next reload:
 
 
kickstart variable = bootflash:/m9100-s5ek9-kickstart-mz.8.1.1.bin
system variable = bootflash:/m9100-s5ek9-mz.8.1.1.bin
Boot POAP Disabled
No module boot variable set

Save the switch’s running-config.

tempest# copy running-config startup-config
[########################################] 100%
Copy complete.
tempest#

Contributed by Cisco Engineers

Miga Pandika
Cisco TAC Engineer

MDS9000 Boot Loader Prompt Recovery

Available Languages

Bias-Free Language

Contents

Introduction

Prerequisites

Requirements

Components Used

Switch Boot Up Sequence

Switch Prompt

Recovery Procedure

Contributed by Cisco Engineers

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