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rb:2600routerpassword [10/10/2013 14:21] (current)
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 +====== Password Recovery Procedure for the Cisco 2600 Routers ======
 +
 +
 +If you can access the router, type show version at the prompt, and record the configuration register setting. See Example of Password Recovery Procedure in order to view the output of a show version command
 +
 +Note: The configuration register is usually set to 0x2102 or 0x102. If you can no longer access the router (because of a lost login or TACACS password), you can safely assume that your configuration register is set to 0x2102.
 +
 +Press Break on the terminal keyboard within 60 seconds of power up in order to put the router into ROMMON. ​
 +
 +Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.
 +
 +This step bypasses the startup configuration where the passwords are stored.
 +
 +Type reset at the rommon 2> prompt.
 +
 +The router reboots, but ignores the saved configuration.
 +
 +Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure.
 +
 +Type enable at the Router> prompt.
 +
 +You are in enable mode and should see the Router# prompt.
 +
 +Type configure memory or copy startup-config running-config in order to copy the nonvolatile RAM (NVRAM) into memory.
 +
 +Important: Do not type copy running-config startup-config or write. These commands erase your startup configuration.
 +
 +Type show running-config.
 +
 +The show running-config command shows the configuration of the router. In this configuration,​ the shutdown command appears under all interfaces, which indicates all interfaces are currently shut down. In addition, the passwords (enable password, enable secret, vty, console passwords) are in either an encrypted or unencrypted format. You can reuse unencrypted passwords. You must change encrypted passwords to a new password.
 +
 +Type configure terminal.
 +
 +The hostname(config)#​ prompt appears.
 +
 +Type enable secret <​password>​ in order to change the enable secret password. For example:
 +
 +    hostname(config)#​enable secret cisco
 +
 +
 +Issue the no shutdown command on every interface that you use.
 +
 +If you issue a show ip interface brief command, every interface that you want to use should display up up.
 +
 +Type config-register <​configuration_register_setting>​. Where configuration_register_setting is either the value you recorded in step 2 or 0x2102 . For example:
 +
 +    hostname(config)#​config-register 0x2102
 +
 +
 +
 +Press Ctrl-z or end in order to leave the configuration mode.
 +
 +The hostname# prompt appears.
 +
 +Type write memory or copy running-config startup-config in order to commit the changes.
 +
 +
 +
 +    Configuration register is 0x2102
 +    Router>
 +  ​
 +    !--- The router was just powercycled,​ and during bootup a
 +    !--- break sequence was sent to the router.
 +  ​
 +  ​
 +    !
 +  ​
 +    *** System received an abort due to Break Key ***
 +  ​
 +    signal= 0x3, code= 0x500, context= 0x813ac158
 +    PC = 0x802d0b60, Vector = 0x500, SP = 0x80006030
 +    rommon 1 > confreg 0x2142
 +  ​
 +    You must reset or power cycle for new config to take effect
 +  ​
 +    rommon 2 > reset
 +  ​
 +    System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
 +    Copyright (c) 1999 by cisco Systems, Inc.
 +    TAC:​Home:​SW:​IOS:​Specials for info
 +    C2600 platform with 32768 Kbytes of main memory
 +  ​
 +  ​
 +    program load complete, entry point: 0x80008000, size: 0x6fdb4c
 +  ​
 +    Self decompressing the image : ###############################​
 +    ##############################################################​
 +    ##############################################################​
 +    ##############################################################​
 +    ###############################​ [OK]
 +  ​
 +  ​
 +     ​Restricted Rights Legend
 +  ​
 +    Use, duplication,​ or disclosure by the Government is
 +    subject to restrictions as set forth in subparagraph
 +    (c) of the Commercial Computer Software - Restricted
 +    Rights clause at FAR sec. 52.227-19 and subparagraph
 +    (c) (1) (ii) of the Rights in Technical Data and Computer
 +    Software clause at DFARS sec. 252.227-7013.
 +  ​
 +     cisco Systems, Inc.
 +     170 West Tasman Drive
 +     San Jose, California 95134-1706
 +  ​
 +    Cisco Internetwork Operating System Software
 +    IOS (tm) C2600 Software (C2600-IS-M),​ Version 12.0(7)T, RELEASE SOFTWARE (fc2)
 +    Copyright (c) 1986-1999 by cisco Systems, Inc.
 +    Compiled Tue 07-Dec-99 02:21 by phanguye
 +    Image text-base: 0x80008088, data-base: 0x80C524F8
 +  ​
 +    cisco 2611 (MPC860) processor (revision 0x202) with 26624K/​6144K bytes of memory.
 +    Processor board ID JAB031202NK (3878188963)
 +    M860 processor: part number 0, mask 49
 +    Bridging software.
 +    X.25 software, Version 3.0.0.
 +    Basic Rate ISDN software, Version 1.1.
 +    2 Ethernet/​IEEE 802.3 interface(s)
 +    2 Serial(sync/​async) network interface(s)
 +    1 ISDN Basic Rate interface(s)
 +    32K bytes of non-volatile configuration memory.
 +    8192K bytes of processor board System flash partition 1 (Read/​Write)
 +    8192K bytes of processor board System flash partition 2 (Read/​Write)
 +  ​
 +  ​
 +     --- System Configuration Dialog ---
 +  ​
 +    Would you like to enter the initial configuration dialog? [yes/no]: n
 +   
 +    Press RETURN to get started!
 +  ​
 +    00:00:19: %LINK-3-UPDOWN:​ Interface BRI0/0, changed state to up
 +    00:00:19: %LINK-3-UPDOWN:​ Interface Ethernet0/​0,​ changed state to up
 +    00:00:19: %LINK-3-UPDOWN:​ Interface Ethernet0/​1,​ changed state to up
 +    00:00:19: %LINK-3-UPDOWN:​ Interface Serial0/0, changed state to down
 +    00:00:19: %LINK-3-UPDOWN:​ Interface Serial0/1, changed state to down
 +    00:00:20: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface BRI0/​0, ​
 +    changed state to down
 +    00:00:20: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Ethernet0/​0,​
 +     ​changed state to up
 +    Router>
 +    00:00:20: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Ethernet0/​1, ​
 +    changed state to up
 +    00:00:20: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Serial0/​0, ​
 +    changed state to down
 +    00:00:20: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Serial0/​1, ​
 +    changed state to down
 +    00:00:50: %SYS-5-RESTART:​ System restarted --
 +    Cisco Internetwork Operating System Software
 +    IOS (tm) C2600 Software (C2600-IS-M),​ Version 12.0(7)T, RELEASE SOFTWARE (fc2)
 +    Copyright (c) 1986-1999 by cisco Systems, Inc.
 +    Compiled Tue 07-Dec-99 02:21 by phanguye
 +    00:00:50: %LINK-5-CHANGED:​ Interface BRI0/​0, ​
 +    changed state to administratively down
 +    00:00:52: %LINK-5-CHANGED:​ Interface Ethernet0/​0, ​
 +    changed state to administratively down
 +    00:00:52: %LINK-5-CHANGED:​ Interface Serial0/​0, ​
 +    changed state to administratively down
 +    00:00:52: %LINK-5-CHANGED:​ Interface Ethernet0/​1, ​
 +    changed state to administratively down
 +    00:00:52: %LINK-5-CHANGED:​ Interface Serial0/​1, ​
 +    changed state to administratively down
 +    00:00:53: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Ethernet0/​0, ​
 +    changed state to down
 +    00:00:53: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Ethernet0/​1, ​
 +    changed state to down
 +    Router>
 +    Router>​enable
 +    Router#copy startup-config running-config
 +    Destination filename [running-config]?​
 +    1324 bytes copied in 2.35 secs (662 bytes/sec)
 +    Router#
 +    00:01:24: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface BRI0/​0:​1, ​
 +    changed state to down
 +    00:01:24: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface BRI0/​0:​2, ​
 +    changed state to down
 +    Router#​configure terminal
 +    Enter configuration commands, one per line. End with CNTL/Z.
 +    Router(config)#​enable secret < password >
 +    Router(config)#​^Z
 +    00:01:54: %SYS-5-CONFIG_I:​ Configured from console by console
 +    Router#show ip interface brief
 +  ​
 +    Interface ​  ​IP-Address ​       OK?  Method ​    ​Status ​                  ​Protocol
 +    Ethernet0/0 10.200.40.37 ​     YES  TFTP       ​administratively down    down
 +    Serial0/​0 ​  ​unassigned ​       YES  TFTP       ​administratively down    down
 +    BRI0/​0 ​     193.251.121.157 ​  ​YES ​ unset      administratively down    down
 +    BRI0/​0:​1 ​   unassigned ​       YES  unset      administratively down    down
 +    BRI0/​0:​2 ​   unassigned ​       YES  unset      administratively down    down
 +    Ethernet0/1 unassigned ​       YES  TFTP       ​administratively down    down
 +    Serial0/​1 ​  ​unassigned ​       YES  TFTP       ​administratively down    down
 +    Loopback0 ​  ​193.251.121.157 ​  ​YES ​ TFTP       ​up ​                      up
 +    Router#​configure terminal
 +    Enter configuration commands, one per line. End with CNTL/Z.
 +    Router(config)#​interface Ethernet0/0
 +    Router(config-if)#​no shutdown
 +    Router(config-if)#​
 +    00:02:14: %LINK-3-UPDOWN:​ Interface Ethernet0/​0,​ changed state to up
 +    00:02:15: %LINEPROTO-5-UPDOWN:​ Line protocol on Interface Ethernet0/​0, ​
 +    changed state to up
 +    Router(config-if)#​interface BRI0/0
 +    Router(config-if)#​no shutdown
 +    Router(config-if)#​
 +    00:02:26: %LINK-3-UPDOWN:​ Interface BRI0/0:1, changed state to down
 +    00:02:26: %LINK-3-UPDOWN:​ Interface BRI0/0:2, changed state to down
 +    00:02:26: %LINK-3-UPDOWN:​ Interface BRI0/0, changed state to up
 +    00:​02:​115964116991:​ %ISDN-6-LAYER2UP:​ Layer 2 for Interface BR0/​0, ​
 +    TEI 68 changed to up
 +    Router(config-if)#​^Z
 +    Router#
 +    00:02:35: %SYS-5-CONFIG_I:​ Configured from console by console
 +    Router#copy running-config startup-config
 +    Destination filename [startup-config]?​
 +    Building configuration...
 +    [OK]
 +    Router#show version
 +    Cisco Internetwork Operating System Software
 +    IOS (tm) C2600 Software (C2600-IS-M),​ Version 12.0(7)T, RELEASE SOFTWARE (fc2)
 +    Copyright (c) 1986-1999 by cisco Systems, Inc.
 +    Compiled Tue 07-Dec-99 02:21 by phanguye
 +    Image text-base: 0x80008088, data-base: 0x80C524F8
 +  ​
 +    ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
 +  ​
 +    Router uptime is 3 minutes
 +    System returned to ROM by abort at PC 0x802D0B60
 +    System image file is "​flash:​c2600-is-mz.120-7.T"​
 +  ​
 +    cisco 2611 (MPC860) processor (revision 0x202) ​
 +    with 26624K/​6144K bytes of memory.
 +    Processor board ID JAB031202NK (3878188963)
 +    M860 processor: part number 0, mask 49
 +    Bridging software.
 +    X.25 software, Version 3.0.0.
 +    Basic Rate ISDN software, Version 1.1.
 +    2 Ethernet/​IEEE 802.3 interface(s)
 +    2 Serial(sync/​async) network interface(s)
 +    1 ISDN Basic Rate interface(s)
 +    32K bytes of non-volatile configuration memory.
 +    8192K bytes of processor board System flash partition 1 (Read/​Write)
 +    8192K bytes of processor board System flash partition 2 (Read/​Write)
 +  ​
 +    Configuration register is 0x2142
 +  ​
 +    Router#​configure terminal
 +    Enter configuration commands, one per line. End with CNTL/Z.
 +    Router(config)#​config-register 0x2102
 +    Router(config)#​^Z
 +    00:03:20: %SYS-5-CONFIG_I:​ Configured from console by console
 +  ​
 +    Router#show version
 +    Cisco Internetwork Operating System Software
 +    IOS (tm) C2600 Software (C2600-IS-M),​ Version 12.0(7)T, RELEASE SOFTWARE (fc2)
 +    Copyright (c) 1986-1999 by cisco Systems, Inc.
 +    Compiled Tue 07-Dec-99 02:21 by phanguye
 +    Image text-base: 0x80008088, data-base: 0x80C524F8
 +  ​
 +    ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
 +  ​
 +    Router uptime is 3 minutes
 +    System returned to ROM by abort at PC 0x802D0B60
 +    System image file is "​flash:​c2600-is-mz.120-7.T"​
 +  ​
 +    cisco 2611 (MPC860) processor (revision 0x202) ​
 +    with 26624K/​6144K bytes of memory.
 +    Processor board ID JAB031202NK (3878188963)
 +    M860 processor: part number 0, mask 49
 +    Bridging software.
 +    X.25 software, Version 3.0.0.
 +    Basic Rate ISDN software, Version 1.1.
 +  ​
 +    2 Ethernet/​IEEE 802.3 interface(s)
 +    2 Serial(sync/​async) network interface(s)
 +    1 ISDN Basic Rate interface(s)
 +    32K bytes of non-volatile configuration memory.
 +    8192K bytes of processor board System flash partition 1 (Read/​Write)
 +    8192K bytes of processor board System flash partition 2 (Read/​Write)
 +  ​
 +    Configuration register is 0x2142 (will be 0x2102 at next reload)
 +  ​
 +    Router#
 +
 +  http://​www.cisco.com/​en/​US/​products/​hw/​routers/​ps133/​products_tech_note09186a008022493f.shtml
 +
  

rb/2600routerpassword.txt ยท Last modified: 10/10/2013 14:21 (external edit)