This post is part of a series of posts about dynamic routing protocols and especially RIP. We’ll try to get a deep understanding of its operation and function as an introductory to dynamic routing logic in general. You’ll see that what we think easy may hide an incrementing complexity… a little introduction Berfore we start

This blog is a part of series of posts about EIGRP routing protocol. Let’s recall that EIGRP is one of the so called IGP routing protocols. IGP stands for interior routing protocols as opposed to EGP or exterior routing protocols. In addition EIGRP is a hybrid as it borrows some similiarities to distance-vector and link-state

What happens when LAN interfaces are configured as point-to-point network type OSPF interfaces instead of default broadcast type? And more than 2 ospf routers are present on this media? Let’s test this on network (R1, R2, R3): Routers are Cisco 7206VXR GNS3 emulated and run C7200 ADVENTERPRISEK9-M IOS version 15.3(3)XB12. They are configured as: R1

Let’s put into play AS-Override feature in BGP: see when it applies and how it works. First, AS-Override feature applies to sites that have the same AS number but are linked by another different domain with different AS number, as in the next figure. In our example AS number 1 has neighborship (E-BGP links) to

In this blog we’ll explore the operation of IGP interior routing protocol EIGRP over vNET trunks (another way to say networking trunking similar to vlan trunks used in L2 network by switches to trunks multiple traffics from different vlans into the same physical link) little introduction New IOS release 15.x introduced Easy Virtual Network (EVN)