Hello,

I'm looking for a contribution. I would like a very fast and small Linux (<=10 MB disk and <=16 MB in memory, something like that) to run under Qemu which supports Intel e1000 NICs (or another NIC supported in Qemu) with basic networking tools (ping, netstat, traceroute etc ...). This image would be integrated in GNS3 to be the virtual host. I think this is a better and extensible solution than creating a virtual host from scratch, moreover the integration will be simple as Qemu is already supported in GNS3.

Hope someone can contribute.

Thanks,

_________________
Jeremy
GNS3 Staff

Hi,

I had tested this linux image (called microcore v2.8.1 from Tiny Core Linux) of around 6.2MB on Qemu 0.9.0 which boots up very fast. It includes all the basic networking tools that is required for basic network troubleshooting etc. , it can act as a DHCP client in a network also.

It also includes the feature of adding new extension to it like various light weight GUI pkg (couple of 100KB) that could come handy later for adding web browser.

If you want i can go further cutting down the kernel features to get 1MB or more off it and also lifting off few changes on boot and other necessary stuff.


Thanks
Shoaib

Hi,

Sounds great! :)



Yes I would really appreciate :)

Many thanks,

_________________
Jeremy
GNS3 Staff

hi grossmj, I am working on virtual host, my software is under development but i hope i will make a stable release in the end of this month. here is some detail about my virtual host.

i have implemented tcp/ip stack.
TFTP and partially telnet service support.
CLI interface is available similar to Cisco IOS you can use tab and ?.
you can use ping traceroute and debug commands.
it can generate traffic at every layer.

Virtual host can connect with dynamips router using following commands:
configure terminal
system connect dyna-hyp 127.0.0.1 lport 10 rpot 11

or you can bridge it to physical interface:
configure terminal
system connect pcap-int 192.168.1.111

you can also invoke a dialog box to connect
system gui connect

I also implemented gui interface for traffic generating use this command:
system gui traf-gen

I'll be happy if you are interested to give a look at it. please download...
http://www.4shared.com/account/file/233 ... TVPC4.html

Do you have the sources or is it Windows only?

Thanks,

currently its only windows based i am using ms visual c. i am using contiki/uip as tcp/ip stack it has already ported on linux, then i am using winpcap to bridge it to physical interface there are many alternatives are available on linux. i can also port CLI part and other component of software on linux but i dont have any idea of gui programming in linux.

Hi,

Here is a small Linux host image to be used in GNS3:

http://downloads.sourceforge.net/gns-3/ ... g?download

Quick how to (example):

In GNS3, go to Preferences -> Qemu -> Qemu host

Identifier: Microcore
Binary image: local path to linux-microcore-2.10.img
Memory: 32 MB
NIC: e1000
Qemu options: -no-acpi

Save, OK, drag & drop Qemu host symbol and a Cisco router on the scene. Connect the 2 nodes with a Ethernet link. Start the devices.

In Microcore:

sudo su
ifconfig eth0 10.0.0.1 netmask 255.0.0.0
ifconfig eth0 up

In Cisco IOS:

interface Ethernet 0/0
ip address 10.0.0.2 255.0.0.0
no shut

ping 10.0.0.1

Any comments is welcome :)

Cheers,

_________________
Jeremy
GNS3 Staff

Hi,
I noticed that IP settings Qemu host are lost after restart. I wanted to save my Qemu host configuration (IP, mask, GW, hostname) so I googled it and I did:

1. Add this line to: /opt/bootlocal.sh
sudo hostname PC1
sudo ifconfig eth0 172.16.5.2/24
sudo route add default gw 172.16.5.254

2. Run: sudo /usr/bin/filetool.sh backup

3. Stop Qemu host: sudo halt

After rebooting host IP setting had been saved.
But if 2 instances Qemu host were in topology only the first started host had saved IP setting. The second one booted only with saved hostname - IP setting were lost.
Does anyone know how to fix it or another way how to set permanent IP on host?

Thanks,

_________________
Brezular

http://brezular.wordpress.com

Hi,

Do not put sudo commands in /opt/bootlocal.sh.

Log as root with sudo su then edit /opt/bootlocal.sh



It worked for me.

Cheers,

_________________
Jeremy
GNS3 Staff

Hi,
I did as you suggest and it seems that it works now...

Oh, I almost forget to say big thank you for Qemu host - it is very fast and easy to use.

Btw. Will be more features e.g. ipv6 and ssh available?

Cheers,

_________________
Brezular

http://brezular.wordpress.com