Hello everyone,
I've been wrestling on and off with a Cisco 3620 (3600 Series) Router for the past 3 days.
I flashed the IOS from the router thinking it shouldn't be too difficult reinstalling an image on it:
As you may know, without a working IOS, I am only able to access rommon>
When I run the command meminfo, I receive the following information:
Main memory size: 32 MB in 32 bit mode.
Available main memory starts at 0xa000e000, size 32712KB
IO (packet) memory size: 25 percent of main memory.
NVRAM size: 32KB
When I run dev, I receive the following:
Devices in device table:
id name
flash: flash
slot0: PCMCIA slot 0
slot1: PCMCIA slot 1
eprom: eprom
When I run dir flash, I receive the following:
rommon 11 > dir flash
bad device name
usage: dir <device>
The version of rommon I have does not support tftpdnld.
It supports dnld and x/ymodem
I have tried running xmodem -c <imagename> and xmodem -r <imagename> on the following images:
c3620-ik2s-mz.121-27b.bin , c3620-ik9o3s7-mz.123-22.bin , c3620-ik9s-mz.122-40a.bin , and c3620-jk2o3s-mz.121-27b.bin .
When I run xmodem on c3620-ik2s-mz.121-27b.bin , c3620-ik9s-mz.122-40a.bin , and c3620-jk2o3s-mz.121-27b.bin , I get the following error and cannot download them: "Do not start the sending program yet...
device does not contain a valid magic number
dir: cannot open device "flash:"
c3620-ik9o3s7-mz.123-22.bin is the only IOS I can install, BUT when it finishes, I receive the following error:
rommon 19 > xmodem -c -r c3620-ik9o3s7-mz.123-22.bin
Do not start the sending program yet...
Invoke this application only for disaster recovery.
Do you wish to continue? y/n [n]: y
Ready to receive file /? ...
C
Download Complete!
program load complete, entry point: 0x80008000, size: 0xe6b5c8
Error : memory requirements exceed available memory
Memory required : 0x0263674C
*** System received a Software forced crash ***signal= 0x17, code= 0x4, context= 0x8000eb20
PC = 0x800080d4, Cause = 0x20, Status Reg = 0x3041f003
The c3620-ik9o3s7-mz.123-22.bin image is only 15MB. As you saw earlier from my meminfo, the router has a 32MB capacity with 25% (8.18MB) used for a routing table. 15MB + 8.18MB = 23.18MB. How can memory requirements exceed available memory when I should have 32MB-23.18MB (9MB) left over?
I am connected directly to the modem via serial connection in the console port
I will not be transferring from router to router.
I do not have a PCMCIA card / External Flash Card
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My questions for you all are:
"Why am I receiving the memory exceeded error?"
Do I need to clean/format/erase the DRAM in order to install the IOS?"
"Can I install install the c3620-ik9o3s7-mz.123-22.bin directly to DRAM without first installing it to Flash? (I thought that's what xmodem -r was for...)
Would anyone know how to resolve this issue of my inability to load this IOS on my Cisco 3620 router?
Your help is VERY much appreciated.
Thank you,
