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Router 4500 HW problems

Hello, I've got a Cisco 4500 router in my lab.

I'm not using it much, but I remember it was working fine last time I've used it a coule of months ago.

Now when I boot it up it seems to use the boot image.

Router(boot)#dir flash:

Directory of flash:/

1 -rw- 6952332 <no date> c4500-is-mz.122-2.T.bin

16777216 bytes total (9824820 bytes free)

Router(boot)#dir bootflash:

Directory of bootflash:/

1 -rw- 2994404 <no date> c4500-boot-mz.122-17.bin

4194304 bytes total (1199836 bytes free)

That register says 0x0 (??)

So I've set it manually to 0x2102.

It seems to like the command but still no luck in booting up from the IOS image.

Also, if I switch the Router off for a while it doesn't keep the values

This is the show version after a cold bootstrap

Router(boot)#sh ver

Cisco Internetwork Operating System Software

IOS (tm) 4500 Software (C4500-BOOT-M), Version 12.2(17), RELEASE SOFTWARE (fc3)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Thu 15-May-03 17:20 by srani

Image text-base: 0x60008948, data-base: 0x60546000

ROM: System Bootstrap, Version 5.2(7) [rchiao 7], RELEASE SOFTWARE (fc1)

Router uptime is 4 minutes

System returned to ROM by power-on

Running default software

cisco 4500 (R4K) processor (revision B) with 32768K/16384K bytes of memory.

Processor board ID 02598700

R4600 CPU at 100Mhz, Implementation 32, Rev 2.0

G.703/E1 software, Version 1.0.

X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s)

1 Token Ring/IEEE 802.5 interface(s)

4 Serial network interface(s)

128K bytes of non-volatile configuration memory.

16384K bytes of processor board System flash (Read/Write)

4096K bytes of processor board Boot flash (Read/Write)

Configuration register is 0x101 (will be 0x0 at next reload)

Any advice?



Re: Router 4500 HW problems


I'm not 100% certain of this, but if you pull the right-hand network module (the one closest to the power supply), you'll see two 28 pin socketed IC's. One of them will have the cisco boot ROM version and copyright on it. I *think* the other is the NVRAM. The socket looks "thicker" than normal, and I suspect it's a Dallas Semiconductor (or equivalent) socket with a battery built-in. This battery has a finite lifetime. Or maybe that SRAM chip is itself bad.

The low-hanging fruit may be to find another 4500 that works OK and swap it out. :o/


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