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As you may know BGP HAS to pick a best route, and that is the route that will be put into our global routing table. Recall that our IGPs have a maximum-paths command that state how many paths can be in the routing table? BGP supports the “maximum-paths” command, however it behaves differently than it …
Continue reading “BGP – How to configure basic Multipath/Load balancing”
The reason I decided to make this post is because all other MED/Metric changing tutorials out there only include an example of one prefix. I wanted to make one that looked more realistic. Before we begin let’s overview the BGP MED attribute: MED/Metric are synonymous MED influences how your eBGP neighbors should enter your autonomous …
Continue reading “BGP – Changing MED/Metric to Influence Inbound Routing with Lab Examples”
Link between R1-2 is 10.0.0.0/30 link between R1-4 is 10.0.1.0/30 Link between R2-4 is 10.0.2.0/30 Link between R2-3 is 10.0.3.0/30 R1 has a loopback of 1.1.1.1/32 R3 has a loopback of 3.3.3.3/32 We want our traffic to go from router 3 (far right) to router 4, then to router 1. We need to apply this …
yes, I see I spelled Colorado wrong. In this topology: Denver is AS1 Chicago to Colorado is AS 2 Virginia and everything to the right is AS3 First we configure our links with /30s, then I give denver a lo0 of 1.1.1.1 and Chicago a l0 of 2.2.2.2, then configure eBGP between the …
Continue reading “BGP – Using the next-hop-self command to provide Transit”
Although not required by the CCNA it’s good to know how to calculate EIGRP metrics to really understand distance. I haven’t found any great guides on teaching this so I thought I’d take a stab at it. Since the only values we use are K1 and K3 by default (Bw and Delay) Here is how …
Continue reading “Calculating EIGRP Metric with real world examples”
Another very simple concept that confuses the heck out of people is the concept of mismatching VLAN’s and merging broadcast domains. Let’s take the below topology in consideration. We have 2 switches connected together, and we have 2 computers connected to them. If we didn’t configure VLAN’s this would be one broadcast domain. This …