Juniper Router IOS for GNS3

GNS3 is an open-source network simulator that allows users to create virtual networks with various devices, including routers and switches. To use Juniper router IOS in GNS3, you need to generate a Cisco IOU license. This article will guide you through the process of generating the license and setting up your Juniper router in GNS3.

Generating the Cisco IOU License

To start, you'll need to create a file named `CiscoKeyGen.py` with the following content:

```

Print 'hostid=' + hostid +', hostname='+ hostname + ', ioukey=' + hex(ioukey)

```

This script is used to calculate the host key based on the host ID and hostname. You can find more information about this script on 'the official website'.

Setting up GNS3

Once you have generated your IOU license, you'll need to set up GNS3. To do this, follow these steps:

1. Install GNS3 using the guide found on the official website.

2. Create a new directory for your projects and copy all your IOS images into an 'images' folder within it.

3. Use the link provided to install all the dependencies required by GNS3.

Using IOU Images with GNS3

GNS3 allows you to use IOU images as virtual routers. To do this, follow these steps:

1. Copy your IOS images to the 'images' folder.

2. Add some routers using the link provided.

3. Once GNS3 is installed, create extra directories (such as 'projects', 'configs', and 'tmp') for better organization.

Setting up Ubuntu Server

If you're setting up Ubuntu Server without a GUI, you'll need to install the GUI using the following commands:

```

sudo apt-get update

sudo apt-get install ubuntu-desktop

```

This will allow you to access GNS3 with a graphical interface.

Configuring the vSRX

To use your Juniper router in GNS3, you'll need to configure it as follows:

1. Install the `vsrx` package using the link provided.

2. Deploy the OVA file (available on the same link) using the vSphere desktop client.

3. Configure the vSRX by executing the following commands:

```

Root# set security forwarding-options family inet6 mode packet-based

Root# set security forwarding-options family iso mode packet-based

Root# set security forwarding-options family mpls mode packet-based

Root# set interfaces ge-0/0/0 unit 0 family inet address x.x.x.x/xx

Root# set system root-authentication plain-text-password

Root# set system host-name NL-RTD01-VSRX01

```

These commands will ensure that the vSRX behaves like a router in packet mode.

In conclusion, generating a Cisco IOU license and setting up your Juniper router in GNS3 requires some configuration and setup. By following these steps, you'll be able to use your Juniper router as a virtual device in GNS3.

Juniper router ios for gns3