GNS3: ICMP Destination port unreachable - Cisco Learning Network Another three UDP messages are now sent, each with the TTL value set to 2, which causes the second router to return ICMP TEMs This process continues until the packets actually reach the other destination Since these datagrams are trying to access an invalid port at the destination host, ICMP Port Unreachable Messages are returned, indicating an unreachable port; this event signals the
GNS3 How to. pdf - Cisco Learning Network A lot of people, specially when they start studying the entry levels certifications have many problems on how to install and configure GNS3 for running their study labs This is a simple manual on how to install and setup GNS3 configuration
CSR 1000V on GNS3 with free IOS-XE 3. 14 image - Cisco Learning Network You'll need latest GNS3 version, latest Qemu Linux(available on my Ubuntu PPA) or latest VirtualBox and a free CSR 1000V IOS XE image, a powerful machine and plenty of RAM if you intend to build large topologies (3 GB per VM)