Simple L2L IPsec VPN on Cisco
This is simple Lab environment I built when was working on IPsec VPN tunnel between our internal network environment and 3rd party vendor systems. As we had some issues with establishing IPsec communication, to make sure that everything is fine on my side I start replicating live environment in Lab. To build test environment quick I use GNS3 as platform to run Dynamips hypervisor for IOS. That speeds up whole process of preparation and testing.