Cisco 1812J をメモリ無しで起動する

        ____
      /⌒  ⌒\
     / ( ●)  (●)\    「Ciscoルータをflash抜きで起動すると
   / ::::::⌒(__人__)⌒:::::\    どうなるの?」っと
    |      |r┬-|     |
   \     `ー’´    /
   ノ            \
. /´                 ヽ                 カ
 |    l   l||l 从人 l||l      l||l 从人 l||l   カ   タ
 ヽ    -一””””~~``’ー–、   -一”””’ー-、.     タ
  ヽ ____(⌒)(⌒)⌒) )  (⌒_(⌒)⌒)⌒))
   ┌ ┌┬┬┐┌┬┬┬┐┌┬┬┬┐┌┬┬┬┐
  ,. – ””| ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ρ ̄`l
   ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ノ ̄ ̄
こうなった。
System Bootstrap, Version 12.3(8r)YH9, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2006 by cisco Systems, Inc.
C1800 platform with 131072 Kbytes of main memory with parity disabled
Readonly ROMMON initialized
boot: cannot open “flash:”
boot: cannot determine first file name on device “flash:”
System Bootstrap, Version 12.3(8r)YH9, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2006 by cisco Systems, Inc.
C1800 platform with 131072 Kbytes of main memory with parity disabled
Readonly ROMMON initialized
boot: cannot open “flash:”
boot: cannot determine first file name on device “flash:”
System Bootstrap, Version 12.3(8r)YH9, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2006 by cisco Systems, Inc.
C1800 platform with 131072 Kbytes of main memory with parity disabled
Readonly ROMMON initialized
rommon 1 >
rommon 1 >
rommon 1 >
rommon 1 >
rommon 1 > ?
alias set and display aliases command
boot boot up an external process
break set/show/clear the breakpoint
confreg configuration register utility
cont continue executing a downloaded image
context display the context of a loaded image
cookie display contents of cookie PROM in hex
dev list the device table
dir list files in file system
dis display instruction stream
frame print out a selected stack frame
help monitor builtin command help
history monitor command history
iomemset set IO memory percent
meminfo main memory information
repeat repeat a monitor command
reset system reset
rommon-pref Select ROMMON
set display the monitor variables
showmon display currently selected ROM monitor
stack produce a stack trace
sync write monitor environment to NVRAM
sysret print out info from last system return
tftpdnld tftp image download
unalias unset an alias
unset unset a monitor variable
xmodem x/ymodem image download
rommon 2 > memi
monitor: command “memi” not found
rommon 3 > memingo
monitor: command “memingo” not found
rommon 4 > meminfo
Main memory size: 128 MB.
Available main memory starts at 0x80012000, size 0x1ffb8 KB
IO (packet) memory size: 10 percent of main memory.
NVRAM size: 192 KB
rommon 5 >
rommon 5 >
rommon 5 >
拡張DRAMも抜いた状態。
flashが見つからないと2回言われてROMMONで起動。
128MBはオンボードで搭載されてるようです。
NVRAMのサイズが192KBだというのが貴重なデータでした。
私はてっきりflash内にNVRAMの領域があるものかとばかり
思っていましたが、どうやら別付けでオンダイしてるようです。
192KBを超える行数を入れると圧縮されるって寸法だ。

コメントを残す