2500 router freezes after power on.

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I am reposting this question. There are a couple of typos in previous one.

I have a 2500 router. It freezes after it starts/reboots every time. I can't even get into its ROMMON, it won't respond to the key. I copied the message here. Thanks in advance.

Han,

System Bootstrap, Version 11.0(10c), SOFTWARE

Copyright (c) 1986-1996 by cisco Systems

2500 processor with 16384 Kbytes of main memory

F3: 9286440+846656+770252 at 0x3000060

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) 2500 Software (C2500-IO-L), Version 12.2(26), RELEASE SOFTWARE (fc2)

Copyright (c) 1986-2004 by cisco Systems, Inc.

Compiled Sat 31-Jul-04 03:32 by eaarmas

Image text-base: 0x03050A44, data-base: 0x00001000

cisco 2500 (68030) processor (revision A) with 16384K/2048K bytes of memory.

Processor board ID 01207578, 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.

16384K bytes of processor board System flash (Read ONLY)

Press RETURN to get started!

00:00:07: %LINK-3-UPDOWN: Interface Ethernet0, changed state to up

00:00:08: %LINK-3-UPDOWN: Interface Serial0, changed state to up

00:00:08: %LINK-3-UPDOWN: Interface Serial1, changed state to down

00:00:09: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state

to up

00:00:18: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed sta

te to down

00:00:20: %SYS-5-CONFIG_I: Configured from memory by console

00:00:21: %LINK-5-CHANGED: Interface Serial0, changed state to administratively

down

00:00:23: %LINK-5-CHANGED: Interface Serial1, changed state to administratively

down

00:00:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state

to down

00:00:26: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed state

to down

00:01:04: %SYS-5-RESTART: System restarted --

Cisco Internetwork Operating System Software

IOS (tm) 2500 Software (C2500-IO-L), Version 12.2(26), RELEASE SOFTWARE (fc2)

Copyright (c) 1986-2004 by cisco Systems, Inc.

Compiled Sat 31-Jul-04 03:32 by eaarmas

00:01:04: %SNMP-5-COLDSTART: SNMP agent on host Router is undergoing a cold star

tˇ

=================================================================

FREEZES

I have this problem too.
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Kevin Dorrell Tue, 12/11/2007 - 05:41

Couple of things to check. First, try re-seating the DRAM and flash modules.

Secondly, I presume you have tested your console terminal on another router. That is, I presume you terminal is working correctly.

Also, if your terminal is a laptop, try using a desktop PC instead. The voltages used by laptops on the serial port are sometimes not enough for reliable communication. The 2500 series seems to be particularly sensitive to incorrected levels on the serial line.

Kevin Dorrell

Luxembourg

ccbootcamp Tue, 12/11/2007 - 06:07

Change the flow control from hardware to software or vice versa. That seems to fix this issue. It's different serial chipsets on motherboards that causes this problem with older 2500s.

-brad

www.ccbootcamp.com

(please rate the post if this helps!)

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