7/30/2019 Casar

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7/30/2019 Casar

3/3

FlashRecovery

Herearetherequiredstepstorecoverfromamissingorcorruptbootimage:

ConnectaconsolecablefromtheASAtoyourcomputerandopenupaserialconnectionusingPutty

Disableanysoftwarefirewallonyourcomputer InstallTFTPserversoftwareonyourcomputer PlacetheCiscosoftwareimageintheTFTPRootfolder(asa821k8.bin)andstartthe

TFTPservice

AssignastaticIPaddresstoyourcomputerIused192.168.20.1(anaddressoutsideofmyexistingsubnet)

ConnectanEthernetcablebetweenyourcomputerandport0/0ontheASA PowerofftheASAthenpoweritbackon Press

the

escape

key

to

boot

into

ROMMON

mode

EnterthefollowingcommandsintheASA(thefirstpartofthesecommandsmustbeincaps)

rommon#1>ADDRESS=192.168.20.10

rommon#2>SERVER=192.168.20.1

rommon#3>GATEWAY=192.168.20.1

rommon#4>IMAGE=asa821k8.bin

rommon#5>PORT=Ethernet0/0

Thesecommands

assign

an

IP

address

of

192.168.20.10

to

port

0/0

on

the

ASA

and

tell

it

tolookatyourTFTPserver192.168.20.1andtoselecttheASAsoftwareimage.

Next,executethecommandtotransfertheimagefromtheTFTPservertotheASArommon#6>tftp