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New Member

Cat6k Failed to boot up IOS

Hi NetPro.

Now hitting another problem for Cat6k. i am doing the patching for Cat6k ... while rebooting the switch directly went to rommon1>. whereby i have checked the boot path and IOS image. everything was ok. the weird thing was from rommon1> i type boot command. it went up for a minute and went down to rommon1> again .....

i am totally no idea how to fix this.. i have tried few times to boot but eventually still failed.

below is the switch info.


Directory of sup-bootdisk:/

    1  -rw-    42878468   Dec 1 2008 17:53:54 +08:00  s72033-ipservicesk9-mz.122-18.SXF12.bin

    2  -rw-      263663  Jul 15 2009 21:56:50 +08:00  crashinfo_20090715-135651

    3  -rw-    43012100  Jan 13 2010 15:48:40 +08:00  s72033-ipservicesk9-mz.122-18.SXF16.bin

512024576 bytes total (425852928 bytes free)


Core#sh hard
Cisco Internetwork Operating System Software
IOS (tm) s72033_rp Software (s72033_rp-IPSERVICESK9-M), Version 12.2(18)SXF12, RELEASE SOFTWARE (fc2)
Technical Support:
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Sun 18-Nov-07 06:39 by kellythw
Image text-base: 0x40101040, data-base: 0x42DCBC50

ROM: System Bootstrap, Version 12.2(17r)S4, RELEASE SOFTWARE (fc1)
BOOTLDR: s72033_rp Software (s72033_rp-IPSERVICESK9-M), Version 12.2(18)SXF12, RELEASE SOFTWARE (fc2)

CS1_CCB_2A uptime is 33 weeks, 1 day, 4 hours, 32 minutes
Time since CS1_CCB_2A switched to active is 33 weeks, 1 day, 4 hours, 33 minutes
System returned to ROM by  power cycle at 17:00:29 CCT Tue Jun 30 2009 (SP by power on)
System restarted at 22:17:13 CCT Wed Jul 15 2009
System image file is "sup-bootdisk:s72033-ipservicesk9-mz.122-18.SXF12.bin"

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

cisco WS-C6509-E (R7000) processor (revision 1.3) with 458720K/65536K bytes of memory.
Processor board ID SMC11160040
SR71000 CPU at 600Mhz, Implementation 0x504, Rev 1.2, 512KB L2 Cache
Last reset from s/w reset
SuperLAT software (copyright 1990 by Meridian Technology Corp).
X.25 software, Version 3.0.0.
Bridging software.
TN3270 Emulation software.
78 Virtual Ethernet/IEEE 802.3 interfaces
82 Gigabit Ethernet/IEEE 802.3 interfaces
1917K bytes of non-volatile configuration memory.
8192K bytes of packet buffer memory.

65536K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102


Core#sh run | in boot

boot system flash sup-bootdisk:s72033-ipservicesk9-mz.122-18.SXF16.bin
boot system flash sup-bootdisk:s72033-ipservicesk9-mz.122-18.SXF12.bin
no ip bootp server

VIP Super Bronze

Re: Cat6k Failed to boot up IOS


while in rommon. type "set" and see if you are pointing to the right image.  Then do a "dir bootflash:" and see if the image exist in bootflash:

After verifying the image type "boot bootflash:"



New Member

Re: Cat6k Failed to boot up IOS

Hi Reza.

thanks for your information, i have checked the directory and the IOS was in the sup-bootdisk: however , when i reboot and the sup engine was not able to boot up the New either the Old , it went to the Rommon directly . then i forced to boot up the Old IOS . it went up for few second and went down to Rommon again. that's why i was surprised why the Old IOS also can't boot up anymore.....

Thanks a lot.

VIP Super Bronze

Re: Cat6k Failed to boot up IOS


You can also boot it from disk0 if you have one. Get a CF card and use a good box to copy the IOS into it then put it in  CF slot on the sup and when in rommon. type "boot disk0:and the IOS name"  and see if you can boot it from disk0:



New Member

Re: Cat6k Failed to boot up IOS

Hi Reza,

Thanks for sharing , i am just suprised that once the Core switch reboot and it keeping up to Rommon1> ... could it be the hardware problem ?
because, once the switch rebooted and i found there are lot of crashinfo in the directory.

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