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2900系列路由器密码恢复操作
---供参考：
前期准备：PC可以通过controller口来登录路由器。
1、路由器断电。（shut down the router.）
2、移除后面板上的 compact flash。具体位置请参考以下链接： Figure 1-4 Front Panel of the Cisco 2911 Router
http://www.cisco.com/en/US/partner/docs/routers/access/2900/hardware/installation/guide/Overview.html#wp1082928
3、开机 （Switch on the router.）
4、当路由器进入 Rommon mode, 将compact flash插回去。
5、执行以下操作：
rommon 1 > confreg 0x2142
You must reset or power cycle for new config to take effect
rommon 2 > reset
System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1) Copyright (c) 2009 by cisco Systems, Inc. TAC:Home:SW:IOS:Specials for info
C2900 platform with 524288 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
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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 IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Dec-09 15:23 by prod_rel_team
Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory. Processor board ID FHH1230P04Y 1 DSL controller
3 Gigabit Ethernet interfaces 9 terminal lines
1 Virtual Private Network (VPN) Module 1 Cable Modem interface
1 cisco Integrated Service Engine-2(s) Cisco Foundation 2.2.1 in slot 1
DRAM configuration is 64 bits wide with parity enabled. 255K bytes of non-volatile configuration memory.
248472K bytes of ATA System CompactFlash 0 (Read/Write) 62720K bytes of ATA CompactFlash 1 (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>
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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 IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Dec-09 15:23 by prod_rel_team 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]? //直接回车 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 > //输入安全密码
router(config)#username cisco privilege 15 password cisco //创建新的用户名、密码
router(config)#config-register 0x2102
Router#copy running-config startup-config
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Destination filename [startup-config]? Building configuration... [OK]
Router#show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Dec-09 15:23 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1)
c2921-CCP-1-xfr uptime is 2 weeks, 22 hours, 15 minutes
System returned to ROM by reload at 06:06:52 PCTime Mon Apr 2 1900 System restarted at 06:08:03 PCTime Mon Apr 2 1900
System image file is \Last reload reason: Reload Command
Cisco CISCO2921/K9 (revision 1.0) with 475136K/49152K bytes of memory. Processor board ID FHH1230P04Y 1 DSL controller
3 Gigabit Ethernet interfaces 9 terminal lines
1 Virtual Private Network (VPN) Module 1 Cable Modem interface
1 cisco Integrated Service Engine-2(s) Cisco Foundation 2.2.1 in slot 1
DRAM configuration is 64 bits wide with parity enabled. 255K bytes of non-volatile configuration memory.
248472K bytes of ATA System CompactFlash 0 (Read/Write) 62720K bytes of ATA CompactFlash 1 (Read/Write)
Configuration register is 0x2142 (will be 0x2102 at next reload)
Router#
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