On GNS3 3.1.5

Go to Edit > Preferences > QEMU >QEMU VMs > New > Create a new HDD: qcow2


On Network tab, set “Adapters” to you like.

Advanced setting:

Initial RAM disk(initrd): the .initrd.gz file, don’t extracted the file:

Kernel command line:

-append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536 ide1=noprobe no-hlt -net nic


untick “Activate CPU throttling”

       Additional settings:

options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32

  1. problem 1: stuck in checking ‘hlt’ instruction… :increase the memory from 1024 to 2048, solved.
  2. Problem2: <0>Kernel panic – not syncing: bad gzip magic numbers   : I unziped the file “-initrd.gz “, so edit the “Initial RAM disk (initrd)” and use the gz file, do not extract it!!!.


After first boot.

you will get the message:

This is your first boot, please wait about 1 min and then type the following commands:
cd /mnt/disk0

So issue these two command separately.

or you can try following command:

# sh
asa/      dev/      init      linuxrc   proc/     sbin/     usr/
bin/      etc/      lib/      mnt/      root/     sys/
# cd /asa
# ls
bin      scripts
# cd scripts/
# ls
first_start.sh   format_flash.sh  fsck_flash.sh
# ./first_start.sh

Type help or ‘?’ for a list of available commands.

Password issue:

you may be prompted to enter password if you try to enter the privilege mode, just hit <enter> to try if you can access.


Flash no space issue:

copy running-config flash:/.private/startup-config

ciscoasa# copy running-config flash:/.private/startup-config

Source filename [running-config]?

Destination filename [/.private/startup-config]?
Cryptochecksum: c066a7ab b5b9071e bb5ee1f6 2d93be53

%Error copying system:/running-config (Not enough space on device)

boot config disk0:/.private/startup-config

ciscoasa(config)# boot config disk0:/.private/startup-config
WARNING: BOOT variable added, but unable to find disk0:/.private/startup-config
ciscoasa(config)# write
Building configuration…
Cryptochecksum: 7abb929e a3615d5a 63830339 c0d50fee

%Error copying system:/running-config (Not enough space on device)
Error executing command



In windows:

To create a flash file
cd “C:\Program Files\GNS3\qemu-2.4.0”
qemu-img.exe create c:\User\usuario\GNS3\FLASH 256M

Formatting ‘D:\flash’, fmt=raw size=268435456


format disk0:

show flash

ASA 931 (ASAv)


asa1When you turn on the VM, choose “I moved the VM” options.

The Default password is empty.

The network adaptors mapping to “manmagement0/0;GigabitEthernet0/0、GigabitEthernet0/1″ and so on.


Reference: http://www.mamicode.com/info-detail-1075705.html