Tag: IOS
Verifying Cisco IOS File Integrity
Moving files on Cisco devices is important to know how to do but knowing the files are free of errors is also important. If you have every upgraded a device and find that it won’t boot because the image file corrupted you certainly know what I’m talking about. While this happens very rarely it’s important […]
Route Summarization Basics
With the advent of Variable Length Subnet Masks (VLMS) and classless networking keeping track of where exactly IP address space physically resides on the network has become a bit more complicated simply because we have the options and the flexibility to break networks into smaller subnets. Chances are you are probably at least somewhat familiar […]
Cisco Layer 2 Tunneling
To a student of networking the OSI model can be a little hard to appreciate until its application is actually seen a few times in the real world. Likewise understanding that you can grab frames or packets and encapsulate them inside other higher layer protocols is also confusing to the newbie. An Ethernet pseudo-wire is […]
Basic Routing Protocol Configuration in VRF Lite
You may recall me posting a basic conceptual article about VRF’s and VRF lite implementation. Well, I am finally back with some more advanced concepts. What good are separate routing instances without the ability to use routing protocols and share routes between routers? Let’s dive right in and see how it’s done!