Cisco router switch password recovery

Cisco router switch password recovery
Password Recovery for the Cisco router 1. router> enablePassword: Password: % Bad passwords Router> show versionCisco IOS Software, 3600 Software (C3640-JK9O3S-M), Version 12.4 (16), release software (fc1) Technical Support: http://www.cisco.com/techsupportCopyright (C) 1986-2007by Cisco Systems, Inc. compiled Wed 20-Jun-0711: 43 by prod_rel_team ROM: ROMMON EmulationMicrocodeROM: 3600 Software (C3640-JK9O3S-M), Version 12.4 (16), release software (fc1) router uptime is 1 minuteSystem returned to ROMby unknown reload cause-suspect boot_data [BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19 System image file is "t ftp://255.255.255.255/unknown "This product containscryptographic features and is subject to UnitedStates and localcountry laws governing import, export, transfer anduse. delivery of Ciscocryptographic products does not implythird-party authorityto import, export, distribute or use encryption. importers, exporters, distributors and users are responsible forcompliance with U. s. and local country laws. by using this product youagree to comply withapplicable laws and regulations. if you are unableto comply with U. s. andlocal laws, return this product immediately. A summary of U. s. lawsgoverning Cisco cryptographic products may be found: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html If you require furtherance please contact us by sending e-mail toexport@cisco.com. cisco 3640 (R4700) processor (revision 0xFF) with 94208 K/4096 K bytes of memory. processor board id1_0000r4700 CPU at 100 MHz, Implementation 33, Rev 1.21 Ethernet interface4 Serial interfacesDRAM configuration is64 bits wide with parity enabled.125K bytes of NVRAM.8192K bytes ofprocessor board System flash (Read/W Rite) Configuration registeris 0x2142Router> 2. when the route is restarted, press ctrl + break to enter the rommon Mode System Bootstrap, Version 12.2 (7r) [cmong 7r], release software (fc1) Copyright (c) 2002 by cisco Systems, Inc. c2600 platform with 131072 Kbytes of main memory PC = 0xfff0ac3c, Vector = 0x500, SP = 0x8000438c monitor: command "boot" aborted due to user interruptrommon 1> 3. in rommon mode, change the storage value to 0x2142rommon 1> confreg 0x21. 42 4. Restart the vro to bring the modified storage value into effect rommon 2> reset 5. enter the vro manual configuration mode wocould you like to enter the initial configuration dialog? [Yes/no]: no Router> enableRouter #6. copy the startup-config file in NVRAM to Router # copy startup-config running-config Destination filename [running-config]? 988 bytes copied in 2.600 secs (380 bytes/sec) Router #7. go to global mode, modify user mode and enter the password Router in privileged mode # configure terminal Router (config) # enable password cisco Router # show ip interface briefRouter (config) # interface Ethernet0/0 Router (configif) # noshutdown 8. restore the storage value to 0x2102Router (config) # config-register 0x2102 9. save the configuration file Router # copy running-config startup-config Note: The 2500 series Router storage value is changed to o/r 0x2142, And the restart command is I. Certificate ------- password of the Cisco switch restored 1. Restart the switch, press the MODE key on the switch, and enter the boot MODE (10-15 s ). The system has been interrupted prior toinitializing theflash filesystem. the following commands will initializethe flash filesystem, and finish loading theoperating system software: flash_init load_helper boot switch: 2. type the flash_init command to initialize flashswitch: flash_init 3. enter the load_helper command and execute dir flashswitch: load_helperswitch: dir flash: Directory of flash:/2-rwx109 <date> info3-rwx3110758 <date> c2950-i6q4l2-mz.121-22.EA6.bin4drwx4160 <date> html373-rwx109 <date> info. ver374-rwx335466 <date> c2950-hdiag-mz.121-9.EA1376-rwx856 <date> vlan. dat377-rwx5 <date> private-config.text378-rwx309 <date> env_vars379-rwx1106 <date> config. text 4. modify config. text File switch: rename flash: config. text flash: config. old 5. restart the switch: boot enters the switch configuration mode and the switch privileged mode. 6. restore the original configuration file Switch # rename flash: config. old flash: config. text 7. call the original configuration file to restore the original Switch configuration Switch # copy flash: config. text system: running-config 8. enter global mode change user mode enter privileged mode password Switch # configure terminal Switch (config) # enable password cisco 9. save the configuration file Switch # write memory note: the 2500 series router's storage value is changed to o/r 0x2142, And the restart command is