GNS3 0.7rc1 supports JUNOS… Lets try it out (Part 2)

In my previous post we creating Qemu & olive-base. Let us now continue with installing JUNOS. Also we will see how GNS3 integrates Qemu to run JUNOS.

First, we will make sure we have the following files before proceding further.

• Patched Qemu (Why patched? to support Multicast)
• olive-base.img (Free BSD with partitioning), download olive-base.img(linux) to skip linux emutor
• GNS3 (used: GNS3 v0.7RC1 all-in-one)
• Olive (used: jinstall-8.5R1.14-domestic-signed.tgz) Again, don’t ask me how to get it.
• OpenVPN (to share connection between Pc and Qemu & transfer Olive to Free BSD)
• Filezilla FTP server (you can use any Ftp server, Filezilla is freeware)
• Few download files as mentioned during install.

Please visit my previous post for more details about patched Qemu and olive-base.img. Some of you will notice the images loading faster, it’s because I have hotlinked them from Picasa web albums. Expect a post for it in future. Lets proceed further with JUNOS installation.

Installing JUNOS:

Before installing Olive we have to make sure we share the connection between PC and Qemu. this is required to transfer Olive fia FTP.

• Install OpenVPN. Go to network adaptor settings.
• In TAP-Win32 Adapter and specify ip address (10.0.2.254) and gateway (for internet).
• Disable Netbios in TAP adapter, it’s junk traffic can slow FTP connectivity.
• The ip-address of  TAP should be in the same subnet as in free BSD (10.0.2.0/8).
• Rename TAP-Win32 Adapter to TAP (case-sensitive).

Once extracting Patched Qemu & olive-base.img to c:\qemu we will follow below steps.

• Boot Qemu & attach Intel e1000 virtual network card as well as Tap Adapter.

qemu -m 256 -hda olive-base.img -boot c -localtime \ -net nic -net tap,ifname=TAP -net nic,macaddr=00:aa:00:60:01:01 ,model=e1000 -net user

• Free BSD bootsup and asks for user & password.
• After entering username and password, Free BSD authenticates and allow you to enter commands.

• Type ifconfig -a. This will allow you to view connected interfaces.
• Type dhclient <interface> (em0), route add default 10.0.2.254.
• After learing ip address via DHCP, type netstat -r to find the default gateway.
• Ping default gateway as well as PC ip and check connectivity.

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dhclient em0 route add default 10.0.2.254 netstat -r ping 10.0.2.2 ping 10.0.2.254

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Everyting looks good . Now I can download JUNOS via FTP and install it.

After downloading Filezilla FTP server, install it. Login to the server, setup user account, shared directory also specify passive mode ip as 10.0.2.254. (I shared my C: drive and placed jinstall-8.5R1.14-domestic-signed.tgz inside C:/Olive folder.). Change the directory permissions to full.

• Download the file via FTP to /var/tmp directory as shown below.
• Specify transfer type as binary otherwise it will end up getting corrupted due to ASCII conversion.

The jinstall file after 7.4 version has a binary called checkpic. This binary will fail and the image cannot be installed. Replacing this binary with /usr/bin/true fixes the issue. Also, it is needed to recalculate MD5 and SHA1 checksums before archiving them back.

cd /var/tmp mkdir jinst-signed cd jinst-signed tar zxvf ../jinstall-8.5R1.14-domestic-signed.tgz mkdir jinst cd jinst tar zxvf ../jinstall-8.5R1.14-domestic.tgz mkdir pkgtools cd pkgtools tar zxvf ../pkgtools.tgz cd bin cp /usr/bin/true ./checkpic cd .. tar zcvf ../pkgtools.tgz * cd .. rm -rf pkgtools tar zcvf ../jinstall-8.5R1.14-domestic.tgz * cd .. rm -rf jinst md5 -q jinstall-8.5R1.14-domestic.tgz > jinstall-8.5R1.14-domestic.tgz.md5 sha1 -q jinstall-8.5R1.14-domestic.tgz > jinstall-8.5R1.14-domestic.tgz.sha1 tar zcfv /var/tmp/jinstall-8.5R1.14-domestic-olive.tgz *

Before proceeding further upload the jinstall-8.5R1.14-domestic-olive.tgz file to FTP server. This is your new Juniper Olive PKG . You can delete other files from /var/tmp folder except jinstall-8.5R1.14-domestic-olive.tgz.

If you have downloaded olive-base.img(linux) , skip installation of linux emutor & go to pkg_add.

• To avoid ELF Binary Type 0 Not Known error when installing, Free BSD has toload Linux kernel modules.

Follow below steps to add linux emulation inside Free BSD.

• Add  linux_enable=”YES” line in /etc/rc.conf .  Save the file and reload Free BSD.

• After reboot type kldstat,check if linux.ko is listed.
• Copy /usr/lib/libc.so to usr/compat/linux/lib/libc.so. Download linux_base-fc4.
• Get the file via FTP and untar it to /usr/ports/emulators directory.
• Edit /etc/make.conf by adding X11BASE=/usr/local. Save the file on exit.

• From /usr/ports/emulators/linux_base-fc4 run the command make all install to install Linux emulator.
• When its done, olive-base.img(linux) is ready for installing JUNOS.

• Finally we will install JUNOS with pkg_add .

pkg_add -f /var/tmp/jinstall-8.5R1.14-domestic-olive.tgz

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Once the jinstall package installed, stop FreeBSD by using the halt command init 0, quit qemu. Jinstall has installed a bootstrap environment we need not boot up FreeBSD one more time to finish the installation. Juniper router does not have VGA out and redirects everything to the serial port. QEMU can redirect the serial port to either stdio or a telnet port. To do so, launch Qemu with the stdio parameter:  then when booting press CTRL+ALT+3 simultaniously for serial console output.

qemu -m 256 -hda olive-base.img -boot c -localtime

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• After the installation it will reboot again, login with root user.

Shutdown JUNOS.  If you wish you do some housekeeping by compressing  the  unused space from the image file. Type the following syntax as mentioned below. This will save some space in your hard drive. Make sure the Image boots properly after compression.

qemu-img.exe convert -c -f qcow2 olive-base.img -O qcow2 olive-router.img

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Save the new olive-base.img securely it’s an important. When running in multiples instances, Qemu optimizes file usage by using a common base image, writing only the changes to “slave” images to save on disk space. It also uses less memory for each Qemu instance. How the slave image is created is demonstrated below.

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qemu-img.exe create -b olive-base.img -f qcow2 R<n>.img

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Where <n> can be any number. Multiple instances can be created depending upon the routers you wish to add. The new slave image can be booted as shown below. This is managed in back-end by qemuwrapper.

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qemu R1.img -m 96 -localtime \ -net nic,macaddr=00:aa:00:60:01:01,model=e1000 -net user

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Networking:

Our Juniper router works, but it’s of no use unless we are able to network properly. We need to create a virtual network to link them together. Dynamips & GNS3 use UDP tunnels to connect emulated routers. They can be used more reliably to connect two Olive routers together. This can also result in lower latency. All these functions will be done by qemuwrapper.exe.-

qemu R1.img -m 96 -serial telnet::2001,server,nowait \-localtime -net nic,vlan=1,macaddr=00:aa:00:60:01:01,model=e1000 \-net udp, vlan=1,sport=10000,dport=10001,daddr=127.0.0.1 qemu R2.img -m 96 -serial telnet::2002,server, nowait \-localtime -net nic,vlan=1,macaddr=00:aa:00:60:01:02,model=e1000 \-net udp, vlan=1,sport=10001,dport=10000,daddr=127.0.0.1

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Olive to GNS3:

Bugs…….. I hate em ………

There seems to be a problem with windows version of  qemuwrapper. It is an important file which does all the back-end stuff like creating slave images, networking different devices via UDP, and managing other functions of Qemu. The problem I’m facing is that whenever I try to start any Juniper router i get the following error

Dynagen management console for Dynamips (adapted for GNS3) Copyright (c) 2008 GNS3 Project => Error: could not communicate with qemuwrapper server 127.0.0.1 It may have crashed. Check the qemuwrapper server output. Exiting...

It appears to be with a bug in cli for qemu version 0.11.0 as well as other versions. It’s unable to create FLASH and SWAP files in the temp directory. Even after disabling UAC and giving full access permissions I am getting the same output. To fix this, I tried created the files manually and was able to start the router, but could not gain telnet access.

c:\GNS3>cd %temp% C:\Users\Sushant\AppData\Local\Temp>cd JUNOS1 C:\Users\Sushant\AppData\Local\Temp\JUNOS1>c:\qemu\qemu-img.exe create -b c:\qemu\olive-base.img -f qcow2 FLASH 4G C:\Users\Sushant\AppData\Local\Temp\JUNOS1>c:\qemu\qemu-img.exe create -f qcow2 SWAP 1G C:\Users\Sushant\AppData\Local\Temp\JUNOS1>cd .. C:\Users\Sushant\AppData\Local\Temp\cd JUNOS2 C:\Users\Sushant\AppData\Local\Temp\JUNOS2>c:\qemu\qemu-img.exe create -b c:\qemu\olive-base.img -f qcow2 FLASH 4G C:\Users\Sushant\AppData\Local\Temp\JUNOS2>c:\qemu\qemu-img.exe create -f qcow2 SWAP 1G

One more issue is that Qemuwrapper uses -serial telnet::3000,server command for telnet, however it doesn’t work as documented. The only way to get console access to work is to use -serial telnet:127.0.0.1:3000,server. On linux/Mac this is easy, simply edit the qemuwrapper.py script to use explicit loopback address. On Windows however, without recompiling qemuwrapper I’m not sure how to get this to work.

Since it’s a Release Candidate, you cannot expect it to be perfect. There are workarounds by which you can edit qemuwrapper.py script and recompile it using python & py2exe. However I prefer to wait till the final release arrives  and continue later.

EDIT:  GNS3 0.7 is available for download and features integrated Qemu .

New post WIP..

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