Lab Setup with GNS3#

GNS3 is used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. GNS3 allows you to run a small topology consisting of only a few devices on your laptop, to those that have many devices hosted on multiple servers or even hosted in the cloud.

../_images/lab.png

Lab#

GNS3 is open source, free software that you can download from http://gns3.com

Basic settings for GNS3#

We start with some basic knowledge about how to set up GNS3, download Cisco images and create new template in GNS3. There are a lot of tutorial videos from David Bombal on YouTube channel.

Lab Setup#

Download the Network Automation appliance from GNS3 marketplace and create the simple Lab topology as above in GSN3.

  • Network Automation docker container

IP address configurations setup:

# Static config for eth0
#auto eth0
#iface eth0 inet static
#       address 192.168.0.2
#       netmask 255.255.255.0
#       gateway 192.168.0.1
#       up echo nameserver 192.168.0.1 > /etc/resolv.conf

# DHCP config for eth0
auto eth0
iface eth0 inet dhcp

# Static config for eth1
auto eth1
iface eth1 inet static
        address 192.168.10.2
        netmask 255.255.255.0
#       gateway 192.168.10.1
#       up echo nameserver 192.168.10.1 > /etc/resolv.conf

# DHCP config for eth1
#auto eth1
#iface eth1 inet dhcp

  • Router Configuration

Now configure the router R1 in the same subnet as the container network address.

config ter
hostname R1
int fa0/0
ip address 192.168.10.11 255.255.255.0
no shut
end

Configure the router R2

config ter
hostname R2
int fa0/1
ip address 192.168.10.12 255.255.255.0
no shut
end

  • Switch Configuration

Configure the IP address (192.168.10.10) on VLAN1, and check interface with sh ip int brief.

config ter
int vlan 1
ip address 192.168.10.10 255.255.255.0
no shut
end
wr

See also

Download Network Automation docker container