Section 15 cisco device management Flashcards
What 4 built in memory locations do cisco routers and switches have?
R.R.F.N. RAM -Random Access memory ROM - Read Only Memory Flash - Newer Devices use removable CompactFlash NVRAM Non-Volatile RAM
when a device is powered on what is loaded first and What two functions are performed
first: it load’s ROM. Read Only Memory
Two Functions: POST and Load Bootstrap.
What does POST do?
Look for problems with the hardware upon startup.
What does loading bootstrap on startup do?
looks in Flash for a IOS startup image to load next.
ROMMON prompt at cmd line
Device saying it can’t find the IOS image.
What does ROMMON stand for and what does it do
ROM Monitor
Can be used to recover a missing or corrupted software image.
How can ROM Monitor be used?
can be used to boot from a USB or external TFTP server
Flash Mempry
Loads first IOS image found in flash by default.
How can a IOS flash memory be overridden
boot system command
How to copy additioanl IOS system images to flash
Via TFTP or USB.
NVRAM
stores the startup-config
What happens to the saved startup-config when you load it
it becomes the current running config in RAM
What happens when no startupconfig is found?
device will load setup wizard
do commands you enter go into the running config immediately?
yes
how to save change to device?
wr
copy running-config startup-config
What happens if you have a catastrophic error
pull the plug and it will boot up with old startup config
FLASh loads what?
start up config and ios system image.
RAM
used a normal working memory of the device
Is ram volatile?
yes
VLAN database
file is vlan.dat
on switch
saves vlan info
How to factory reset a router or switch
write erase
what will write erase do
rease startup config
reloads to boot up with a blank config
setup wizard will run
what is config register
can be used to change way the router boots
whats are the three examples of config-register
0x2102 boot normally (default)
0x2120 boot into rommon
0x2142 ignore contents of NVRAM (startup-config)
