In today's network, just about every network device you are working with is remote to where you are. located. When making some types of changes to network devices, you always run the risk that the change may cause the device to go unreachable, which then triggers an uncomfortable series of events to get the device back online. Bringing the device back online may require you … [Read more...] about ProTip: How to protect yourself from config flubs with the Cisco “reload in” command.
HowTo: Configure an AUX port on a Cisco Router
The AUX port, or auxiliary port, has been a fixture on the back of Cisco access routers for almost 30 years. It was also used on other distribution and core routers as well. Although these ports have sat right next to their sibling, the console port, they are not functionally used much anymore and have become almost forgotten, especially in the Cisco Network Academy … [Read more...] about HowTo: Configure an AUX port on a Cisco Router
HowTo: Backup your VMs off an ESXi Server
One of the biggest challenges that I have had using VMWare's ESXi server in my home lab is efficiently backup up a VM Image. At times I want to take a snapshot of a machine to back it up or take it to another machine that I might be working with. The most obvious way to move a machine is to use the the Datastore Browser through the web interface into the ESXi host. Select … [Read more...] about HowTo: Backup your VMs off an ESXi Server
Q: Packet Tracer: crypto key generate command does not work
If you are trying to complete Cisco Network Academy labs in Packet Tracer versus using physical equipment, you may find that there are a few things that do not work as they on physical equipment. One of these if the crypto key generate command. The Cisco Network Academy labs ask you to enter a command like this: In Packet Tracer, this command will give you an error. … [Read more...] about Q: Packet Tracer: crypto key generate command does not work
HowTo: Understand Cisco DTP
It can be very confusing to understand how Ethernet switch trunks get setup on a switch when using Cisco's Dynamic Trunking Protocol. Understanding how the different modes is critical to designing how you want the ports to behave. Here is a table that represents the different modes a link can come up in based on the DTP/port settings on each end. I have added the Cisco IOS … [Read more...] about HowTo: Understand Cisco DTP