Let’s take a trip down memory lane. I last learned about OSPF basics when studying for my ICND 2 exam in 2008. How do I know and or remember this? Well, 1, it was when I earned my CCNA, my first-ever associate Cisco certification. The more plausible answer is that I kept all my notes […]
When I say OSPF route filtering, I know what some of you think: “Mike, did you bang your head on something? LSDBs have to be consistent across the entire area for OSPF to calculate SPF properly, so how can you filter routes?” There are three ways to filter routes in OSPF, they are: Each of
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“Insanity: doing the same thing over and over again and expecting different results.” Albert Einstein This is an appropriate way to start this post because over the last three nights, I have done the same BGP lab a few times, and I keep doing the same configuration and am getting the same result when I
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BGP allows you to distribute traffic over paths that have different bandwidth. This is different from the unequal cost load balancing that EIGRP can perform, as it is not based on the route’s metric. Instead, it is based on a calculation of your neighbor’s link bandwidth that is configured to use this feature. Let’s take
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Wow, it’s been a while, blogging universe, but I am back with a topic that has eluded me for a long time, and it seems like I was overthinking it as usual. EIGRP is the only protocol that can do unequal cost load balancing; you can have two paths with two different costs, and EIGRP
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This blog is coming from sunny and humid Jacksonville, Florida. Today, we will look at controlling the RIP routing domain using Offset-Lists and Administrative Distance. We must remember that RIP is a distance-vector routing protocol with no idea what the network topology looks like. With this, we can trick RIP into thinking a network is
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EIGRP Feature Summary EIGRP Updates Once routers are adjacent, they can exchange EIGRP update messages, which follow; EIGRP uses Reliable Transport Protocol (RTP) to send multicast EIGRP updates. EIGRP sends updates and waits for a unicast ACK reply from the neighbor the update was sent. If an ASK is not received in the Retransmission Timeout
IP forwarding is how packets go from one side of the network to the other. It is also known as IP routing. So we can have a base understanding, let’s look at the diagram below. How does the R3 know how to forward the telnet packet to R1? Fast Switching and Cisco Express Forwarding (CEF)
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When an error or anomaly happens on a BGP network, BGP will generate a “Notification Message.” As a Network Engineer, this is one message that you do not want to see. This message indicates a problem on your network that caused your BGP peering to fail or stops your BGP peers from forming a neighborship.
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Well, I know it”s been a long time since my last post, but I have been hard at studying for the BGP test. What is BGP? There are two applications for BGP: The options with BGP are endless. Being the protocol that runs the internet, you can imagine that you would need the protocol to