831 lost set-up and start config 2

[silverhairbp]

Recently our Cisco 831 home network router was power cycled. When it completed rebooting, it did not load startup config but rather just loaded the minimum config and reverted into initial set-up.

I successfully copied start to run (verified by sh run), but the setting didn't seem to work. Now even after running the set-up script prepared some weeks back by Burt, I can's seem to get it to work at all.

I tried to reset back to factory specs, but now it goes into initial set-up every cold boot and I have managed to lose the working startup config.

So what did I do wrong (if that can even be ascertained) and what can I do to restore the router back to operational status?

Fortunately I have a fallback router, but want to get back to the Cisco.

Thanks in advance.

 

[brianinms]

Post a show ver

 

[silverhairbp]

sh ver and sh run at cold start without copying start to run

Router>sh ver
Cisco IOS Software, C831 Software (C831-K9O3SY6-M), Version 12.3(11)T7, RELEASE
SOFTWARE (fc3)
Technical Support:

http://www.cisco.com/techsupport

Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Sat 30-Jul-05 12:10 by dchih

ROM: System Bootstrap, Version 12.2(8r)YN, RELEASE SOFTWARE (fc1)

Router uptime is 1 minute
System returned to ROM by power-on
System image file is "flash:c831-k9o3sy6-mz.123-11.T7.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:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco C831 (MPC857DSL) processor (revision 0x300) with 44237K/4915K bytes of mem
ory.
Processor board ID AMB07250CLM (2748418223), with hardware revision 0000
CPU rev number 7
2 Ethernet interfaces
4 FastEthernet interfaces
128K bytes of NVRAM.
24576K bytes of processor board System flash (Read/Write)
2048K bytes of processor board Web flash (Read/Write)

Configuration register is 0x2142

Router>
Router>en
Router#sh run
Building configuration...

Current configuration : 806 bytes
!
version 12.3
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
!
!
ip ips po max-events 100
no ftp-server write-enable
!
!
!
!
no crypto isakmp ccm
!
!
!
interface Ethernet0
no ip address
shutdown
!
interface Ethernet1
no ip address
shutdown
duplex auto
!
interface FastEthernet1
duplex auto
speed auto
!
interface FastEthernet2
duplex auto
speed auto
!
interface FastEthernet3
duplex auto
speed auto
!
interface FastEthernet4
duplex auto
speed auto
!
ip classless
!
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
!
scheduler max-task-time 5000
end

Router#

 

[brianinms]

You need to change your configuration register to 0x2102


router#config t
router(config)#config-register 0x2102

Then do a wr mem and reboot

 

[silverhairbp]

OK, but what do you mean by "Then do a wr mem and reboot"? (I don't have a depth of understanding of Cisco)

Thanks.

 

[brianinms]

router(config)#exit
router# wr mem
router#reload

 

[silverhairbp]

Thanks. I'll give it a try.

 

[plshlpme]

wr mem
just saves your config..

if you have already done that though i wouldnt do it because it will erease whatever is stored in your startup config..

the problem with your config register right now is that it is telling the router to ignore the startup config.. that is why you are booting up to a blank config every time...

 

[silverhairbp]

So are you saying that if I wanted to, I could re-key the set-up script again and copy it to start without worrying about what is there now?

Its my intent to get the router going enough to run SDM. I'll do a more detailed set-up through the GUI. (I know, its probably not the optimal way, but I'm not that Cisco-savvy.)

 

[plshlpme]

ya if you boot it up as it is now.. and enter your config
and then do a wr mem
it will save this new config to the startup..
it will overwrite whatever is there now..
just be sure to then change the config register back to 0x2102 so that it will load that config going forward..

 

[silverhairbp]

I like it. Will give it a try tomorrow.

Thanks to all for the assistance.

 

[burtsbees]

Configuration register is 0x2142
This is the main problem. "wr mem" is the same as "copy run start", but "copy run start" gives you the option of naming the configuration. Not necessary to name it, so "wr mem", or simply "wr" will do the same thing...
router>en
router#conf t
Then configure the router...when finished
router(config)#config-reg 0x2102
router(config)#exi
router#copy run start
Or
router#wr
Once the config register is set, you won't have to set it every time, but you must do a "wr" in order to save it.

Burt

 

[brianinms]

This thing is rigged ... Burt gets a star for saying the same thing I said ... hahaha just kidding.

 

[plshlpme]

lol thats that way this thing works..
and just to add a note to above..

Burt.. once the config register is changed.. you do not need to wr mem to save it. the config register is not part of the startup config.

youll notice that if you go

r2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
r2(config)#confi
r2(config)#config-register 0x2142
r2(config)#end
r2#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-I-L), Version 12.0(21a), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sat 02-Feb-02 04:22 by nmasa
Image text-base: 0x0302F5F0, data-base: 0x00001000

ROM: System Bootstrap, Version 4.14(9.1), SOFTWARE

r2 uptime is 4 days, 7 hours, 29 minutes
System restarted by power-on
System image file is "flash:c2500-i-l.120-21a.bin"

cisco 2500 (68030) processor (revision D) with 16384K/2048K bytes of memory.
Processor board ID 01527033, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2102 (will be 0x2142 at next reload)

r2#
4d07h: %SYS-5-CONFIG_I: Configured from console by consolereload

System configuration has been modified. Save? [yes/no]: no
Proceed with reload? [confirm]

and

blah blah after reload

--- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: no


Press RETURN to get started!


00:00:21: %LINK-3-UPDOWN: Interface Ethernet0, changed state to up
00:00:21: %LINK-3-UPDOWN: Interface Serial0, changed state to down
00:00:21: %LINK-3-UPDOWN: Interface Serial1, changed state to down
00:00:22: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to up
00:00:22: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down
00:00:22: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state to down
00:01:55: %SYS-5-RESTART: System rest
Router>arted --
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-I-L), Version 12.0(21a), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sat 02-Feb-02 04:22 by nmasa
00:01:57: %LINK-5-CHANGED: Interface Ethernet0, changed state to administratively down
00:01:57: %LINK-5-CHANGED: Interface Serial0, changed state to administratively down
00:01:57: %LINK-5-CHANGED: Interface Serial1, changed state to administratively down
00:01:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to down
Router>
Router>
Router>
Router>sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-I-L), Version 12.0(21a), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Sat 02-Feb-02 04:22 by nmasa
Image text-base: 0x0302F5F0, data-base: 0x00001000

ROM: System Bootstrap, Version 4.14(9.1), SOFTWARE

Router uptime is 2 minutes
System restarted by reload
System image file is "flash:c2500-i-l.120-21a.bin"

cisco 2500 (68030) processor (revision D) with 16384K/2048K bytes of memory.
Processor board ID 01527033, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2142

 

[brianinms]

That is true, however most of us have just gotten in the habit of doing a wr mem after any change. =)

 

[burtsbees]

Whoops...pays to pay attention, eh? Sorry brian...

Burt

 

[silverhairbp]

It was a bit of an ordeal, but both the routers are back to normal operation. (I have two 831s.)

I have a follow-up question about Cisco and DHCP for a different thread.

Thanks all for your help. As they say at the office, "Priceless..."