LSR (TSR) stands for Label (Tag) Switched Router. This is where you can see how MPLS can work. An LSR, if it is at the network edge, can impose (Push) or dispose (POP) of a label, while the intermediate LSRs swap labels. We are going to base our discussion on the below diagram. The above […]
As you might have guessed, LSP stands for label-switched path, and TSP stands for tagged-switched path. As shown in the example below, this is the path your label-switched packet will take through your network. Here are a few facts on LSP/TSPs
When I started writing this blog post in Word, I thought I would throw all the MPLS acronyms into one blog post. I have realized it is way too long and would probably make your guys fall asleep, so I have decided to break it down by acronym. We are first going to look at
MPLS stands for MultiProtocol Label Switching. MPLS is a service provider technology that allows fast packet switching based on a label number instead of a MAC address. The MPLS frame sits between the Layer 2 and Layer 3 frames on an IP packet and is 32 bits long. The MPLS label looks like this. The
Over the last few months, I have been studying for the Cisco MPLS exam, and it has been a lot of fun. I already had an idea of MPLS from my ISCW study, but going into more depth and seeing how MPLS operates was a good experience. Over the next few days, I will post
The wonderful world of MPLS Read More »
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.
BGP Notification Error Codes Read More »
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
One of the most critical topics in being a network professional is having the ability to subnet in your head and not rely on programs or calculators to do it for you. We are going to approach this one step at a time. The first is how to convert decimal to binary. The way that