10-14-2009 04:03 PM - edited 03-04-2019 06:22 AM
Hi
I have a 2511 Cisco router which I should downgrade it's IOS version to support IS-IS from c2500-is-l.123-26.bin to version c2500-js-l.122-24a.bin
when I used copy tftp flash command the router successfully reload and try to start the copy process, this copy process always failed.
I set the register value to 0x2101 to start in romom
Router(boot)>
I issued enable command
Router(boot)#
from this prompt no erase command is look like available
Router(boot)#?
clear Reinitialization functions, type "clear ?" for list
configure Configure from terminal or over network
connect <host> Connect to host - same as typing just a host name
copy copy flash tftp or tftp flash
debug Enable debugging functions, type "debug ?" for list
disable Turn off privileged commands
disconnect <cn> Break the connection specified by name or number
enable Turn on privileged commands
exit, quit, logout Exit from the EXEC
name-connection Give a connection a logical name
ping Send echo messages
reload Halt and reload system
resume Make the named connection be current
setup Initialize system configuration
show <cmd> Information commands, type "show ?" for list
systat Show terminal lines and users
telnet <host> Connect to host using telnet protocol
terminal Change terminal's parameters, type "terminal ?"
test Run hardware tests, type "test ?"
trace <address> Trace route to <address>
undebug Disable debugging functions, type "undebug ?" for list
where Show open connections
--More--
which-route Display CLNS route table lookup
write Write configuration memory, type "write ?" for list
<cr> To resume connection
when I issued sh version command
Router(boot)#sh vers
3000 Bootstrap Software (IGS-RXBOOT), Version 9.14(9.b), MAINTENANCE INTERIM SOF
TWARE
Patchlevel = 9.1(12.6)
Copyright (c) 1986-1995 by cisco Systems, Inc.
Compiled Fri 03-Feb-95 07:11 by chansen
System Bootstrap, Version 4.14(9.1), SOFTWARE
Router uptime is 42 minutes
System restarted by power-on
Running default software
cisco 2500 (68030) processor (revision C) with 16380K/2048K bytes of memory.
Processor board serial number 01760615
DDN X.25 software, Version 2.0, NET2 and BFE compliant.
1 Ethernet/IEEE 802.3 interface.
2 Serial network interfaces.
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Device not programmable)
Configuration register is 0x2101
I see device not programmable
if I tried copy tftp flash command I received : ERR: Device in READ-ONLY state
I was upgrade it's flash memory in the pass to a newer IOS software, now I need an older one version someone could help me ??
10-15-2009 11:02 AM
hello Christien,
try to see if you can boot from tftp and try to load the image for isis.
I don't understand this part at the beginning of your post:
>> when I used copy tftp flash command the router successfully reload and try to start the copy process, this copy process always failed.
a copy tftp flash shouldn't cause a reload.
Have you been able to write the new IOS image in flash and the the router fails to boot with the isis image, or really it rebooted during file copy?
refer to following doc for recovery from rommon
http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a008009464c.shtml
I hope you have saved a copy of old image.
Have you also checked the RAM needs of isis image?
Hope to help
Giuseppe
10-15-2009 11:22 AM
Hi Giuseppe,
I have 2 2500 routeurs configure with same flash and memory quantity. The router with which I have problem have an older version of bootstrap than the other.... Tu upgrade the bootstrap what I read we need to change one chip on the board and this router serie is End of life End of support on Cisco.... may be I can finnd newer chip on E-bay, but I was able to upgrade this router to the current IOS with same flash chip...
on both router when we using copy tftp flash command we received a prompt message advertiszed the router will reload (when the router as start normally the flash memory is in read only mode) during the reload the file transfers should work at this time (what I had with the working one) but on which I have problem I received error message copy flash failed....
My router have maximum memory RAM and flash possible 16Mb of flash and 16 Mb of RAM.
I have to downgrade the IOS but in 12.3 IS-IS is not in the image for this serie of router and it is in the 12.2 version series....
10-15-2009 10:41 PM
Hello Christian,
I'm realizing that I've probably never upgraded a C2500 otherwise I would remember this different behaviour of reloading after giving copy tftp flash...
or I'm simply becoming too old to remember?
Best Regards
Giuseppe
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