không thể nạp IOS được!help me plz.

[hoangminhhanh]

chào các thầy cùng các bạn!
con cisco 1721 của mình bị lỗi phần cứng hay bị lỗi gì mà không thể nạp IOS được mong các thầy cùng các bạn giúp cho.
:|:(

rommon 32 > set
PS1=rommon ! >
RANDOM_NUM=359642068
BSI=0
ROM_PERSISTENT_UTC=1014944785
RET_2_RTS=
RET_2_RCALTS=
ip_address=192.168.1.111
ip_subnet_mask=255.255.255.0
default_gateway=192.168.1.1
tftp_server=192.168.1.10
tftp_file=c1700-advsecurityk9-mz.123-11.T.bin
IP_ADDRESS=192.168.1.111
IP_SUBNET_MASK=255.255.255.0
DEFAULT_GATEWAY=192.168.1.1
TFTP_SERVER=192.168.1.10
TFTP_FILE=c1700-advsecurityk9-mz.123-11.T
?=1

rommon 33 > tftpdnld

Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt

IP_ADDRESS: 192.168.1.111
IP_SUBNET_MASK: 255.255.255.0
DEFAULT_GATEWAY: 192.168.1.1
TFTP_SERVER: 192.168.1.10
TFTP_FILE: c1700-advsecurityk9-mz.123-11.T.BIN

Invoke this command for disaster recovery only.
WARNING: all existing data in all partitions on flash will be lost!
Do you wish to continue? y/n: [n]: n

TFTP download aborted - user request

Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt

[gaubibi]

Chào bạn,
tui kiếm được cái này trên net, hi vọng có thể giúp bạn, sry tui ko dịch ra tiếng Việt vì English bết quá.
tks



Need to know the ID for the good router so I make sure I put it in the right spot.
Conversion of the ID for the bad router: 46 4f 43 07 52 32 44 5a 46 01

The ID starts at byte 0x18
Looking at the good cookie it has the same MAC as the bad box.

No guarantee without the ID of the good router to make sure there hasn't been a change in the cookie layout but your new cookie should be:

Code:

01 01 00 0e 84 d7 1f 28 33 00 01 ff 04 48 00 11 00 00 00 00 00 00 00 00 46 4f 43 30 38 30 33 31 4e 43 54 00 00 00 00 00 00 ff ff ff 50 04 49 23 09 01 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff


And yes, issue a reset. You might have to reload IOS (Depends on the cause of the corruption) but configs should still be there and the box should start working.

For info: layout of the cookie:

byte 0x00 - Version
byte 0x01 - Vendor
bytes 0x02-0x07 - Ethernet HW Address
byte 0x08-0x08 - Processor
byte 0x09-0x09 - NVRAM Size
byte 0x0a-0x0a - CPU Speed
byte 0x0b-0x0b - Unused
bytes 0x0c-0x0d - On-board PM ID
bytes 0x0e-0x0f - MAC Address Allocated
bytes 0x10-0x17: 00 00 00 00 00 00 00 00
bytes 0x18-0x22: Processor board ID + CPU revision 0x301
bytes 0x23-0x24 - Deviation
bytes 0x25-0x2c: 00 00 00 00 ff ff ff 50 (50 should be cpu_type)
bytes 0x2d-0x2d - Board Config
bytes 0x2e-0x31: 49 11 ec 03
bytes 0x32-0x37 - WAN MAC Address
bytes 0x38-0x3f: ff ff ff ff ff ff ff ff
bytes 0x40-0x47: ff ff ff ff ff ff ff ff
bytes 0x48-0x4f: ff ff ff ff ff ff ff ff
bytes 0x50-0x57: ff ff ff ff ff ff ff ff
bytes 0x58-0x5f: ff ff ff ff ff ff ff ff
bytes 0x60-0x67: ff ff ff ff ff ff ff ff
bytes 0x68-0x6f: ff ff ff ff ff ff ff ff
bytes 0x70-0x77: ff ff ff ff ff ff ff ff
bytes 0x78-0x7f: ff ff ff ff ff ff ff ff

[hoangminhhanh]

hic mình thử rồi mà vẫn thấy lỗi này!

Copyright (c) 2003 by cisco Systems, Inc.

Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt

Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt

Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt
C1700 platform with 65536 Kbytes of main memory


Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt

Bad checksum on cookie structure, resorting to backup copy

Warning: Cookie information is corrupt

[gaubibi]

Vậy bạn hãy vô trang này :

http://www.tech-recipes.com/cisco_router_tips982.html

và

http://www.thesafehouse.org/forums/showthread.php?t=23995

để xem thêm chi tiết. Hoặc bạn có thể kiếm một con 1721 còn chạy rồi xem cookie nó như thế nào rồi chép sang ?
tks

[hoangminhhanh]

hi! cảm ơn các bạn. sau khi hoàn thành và mình thay đổi thanh ghi thành 0x21041(mình đánh nhầm) va reload thì con 1721 của mình ko còn tín hiệu gì cả conneted vào thấy màn hình trống trơn hihi(pó tay....)