pcap file on disk, and launch Wireshark to display the contents of that file. GNS3 will begin dumping packets from the simulated network to a. A magnifying glass should appear signifying that the link is being inspected. Accept the default file name where the captured packets are saved, and ensure that 'Start the capture visualization program' is checked. Now, to begin packet capture and analysis, right-click on the link between PC1 and the router (the wire should highlight briefly in red), and choose 'Start Capture'. Let's use one more feature of GNS3 in this lab - the ability to capture packets on any wire and send them to Wireshark for analysis.įirst, if you don't have Wireshark installed in your native OS (i.e. What is the value of your ether1 interface? What commands did you use? Use system clock print to verify your success.

Using the response for system clock ?, set the current date and time.

Explore RouterOSĭocument your answers to these questions in the Canvas lab assignment This should succeed.īack at the router, exit Safe Mode via CTRL-X when you're happy with your router configuration.

Ping PC2 through the router: ping 172.16.20.1.

Ping the router's Ether2 interface, which is on the 'other side' (so to speak.) of the router: ping 172.16.20.254.

You should see something to the effect of 84 bytes from 172.16.10.254 icmp_seq=1 ttl=63 time=2.699 ms indicating that the router is responding to PC1. Ping the router's Ether1 interface, which PC1 is directly connected to: ping 172.16.10.254.This sets up a subnet of 172.16.20.0/24, assigns the PC the IP address 172.16.20.1, with a default gateway of 172.16.20.254 (which is the router)įinally, demonstrate the network is functional:.Save the configuration to persist after power cycling: save.This sets up a subnet of 172.16.10.0/24, assigns the PC the IP address 172.16.10.1, with a default gateway of 172.16.10.254 (which is the router).Show the help menu for available command (recall that this is a rudimentary simulated PC): help.Set a new router name: system identity set name=WHATEVER-YOU-WANT.

Check the current router name: system identity print.Give your router a hostname to identify it in larger networks:.Print the configuration to confirm: ip address print.Configure two interfaces (corresponding to the two wires plugged in).Enter 'Safe Mode' via CTRL-X, as a good habit while experimenting with configuration.Select N when prompted to view the license file.Enter the default MikroTik login of admin with a blank password.Note: We are configuring the router first, because we can’t configure the PC network fully until the default gateway (the router) exists.The simple switch provided by GNS3 does not have a console. (You could right-click on each and choose Console as well, but we need to configure all three). Press the Console Connect to All Nodes button to pull up a terminal to both PCs and the Router devices.All the links should turn from RED to GREEN. Press the Start button to launch your two virtual PCs, router, and switch.Note: Wondering why your diagram doesn’t show port labels? Press the “Show/Hide Interface Labels” button.In future labs, when you’re more comfortable, you can make port decisions on your own. For now, just carefully match the diagram. The ports you plug your network wires into must be consistent with the way you configure your router in software. Note: For a generic switch, the ports don't matter - The switch will automatically learn the location of connected devices.Note: The PCs only have 1 interface, so you can’t connect the wire to the wrong port there.Make your network look like the network above. Using the “Add a link” button on the left panel, wire up the network using virtual Ethernet cables.Drag an 'Ethernet Switch' onto the network diagram from the panel at left.Drag a “Mikrotik 6.x” router onto the network diagram from the panel at left.If prompted to 'Choose a server', select 'GNS3 VM'. Drag two “VPCS” (Virtual PCs) onto the blank network diagram from the panel at left.Create a “New Blank Project” and call it lab02.Contains the 'Ether2' port of the Router with IP address 172.16.20.254.Contains one VPC with IP address 172.16.20.1.

CIDR address notation for subnet: 172.16.20.0/24.

Gns3 mikrotik