Router on a Stick – with real simulated routers running Cisco IOS including a Router with an Ethernet Switch module. This is LIKE a real network on a boat using Kerio Connect Firewall. But instead I use a Cisco router to emulate that. It originally had 5 VLANS 4 to simulate the User VLANS on the boat and 1 Management Computer. I ended up also simulating plugging an Internet Source into the Switch and making a VLAN to tunnel that to the router as well. I added Virtual PC’s to see if they could ping each other, the router, and the Internet. I had to set their IP, Gateway Router, and DNS. So I also ended up configuring NAT (or else the Internet router couldn’t get back to them because they were on separate IP Subnetworks.) and DHCP to assign those settings automatically. I also wanted to get a real PC (well a virtual Windows 8 box in VMware) to actually surf the web across this infrastructure. So I added a link as another VLAN to my computer VMNET 8 interface. I put Windows 8 on VMNET 8 and wallah! it gets DHCP IP settings as well … and has full Internet Access. I could have just connected the cloud of VMNET 8 to the VLAN 11 little Ethernet Switch. But why not light up another interface in the Main (Maestro SW) Switch and demonstrate putting an existing VLAN (VLAN11) on another interface port. Lets say that the Windows 8 box was somewhere else away the little switch with the VPCS’s … it demonstrates that PC on a LAN Subnet (VLAN) could be located anywhere. On the actual boat … All the VLANS are in the Wireless Access Points. So you connect to the VLAN based on which wireless network you connect to.
This is a screen shot of the GNS3 Lab up and running … including the router console windows showing the router an switch (and 1 VPC) is actually working.
Windows 8 Release Preview up and running with Internet access through the GNS3 lab infrastructure.
Packet Capture in Wire Shark of Windows 8 PC traffic … This is interesting because the capture was done on the MAESTRO-KERIO-FW-ROUTER, on the FE 0/0 which is the TRUNK connection (everything goes through that) … You can see the NAT happening. The Windows 8 box will send something and 192.168.1.69 will repeat it FROM its IP Address. When a reply comes back it will spoof it / repeat it back to the Windows 8 box as if it came from the 192.168.1.254 router itself. When it comes from an INTERNET host it will repeat it back to Windows 8 as if it came from the real Internet host.
Some of my clients or potential clients might think that I just sell equipment. But I am capable of much more than that …
Alan Spicer Marine Telecom
+1 954 683 3426
communications @ marinetelecom.net