Network engineering and administration used to not need much programming skill. All you needed to know was how to run commands on switches and routers and how to configure networking devices. These days a network engineer has to know how to write code. Otherwise he or she risks becoming outdated and useless in their job….
A BGP transit provider will often send their customer a ‘full table.’ A full table is a table of all the routes and prefixes that the transit provider can connect to. This should be a table of all the IP address blocks available on the public Internet. Different transit provider’s ‘full table’ or Internet global routing table…
On a network, link is established when two devices are able to communicate through layer 1 and layer 2 of the OSI Layer model. When link is not established, the two devices involved in the connection are not able to communicate with one another. There are numerous reasons why two devices would not be able to…
IT people have certain types of jargon or words that are not really defined anywhere. “Bouncing a port” or “bouncing an interface” is one such phrase. There is no where to really look up what this means. You can search Google, but the first result I get (experts exchange) is completely wrong. “Bouncing a port”…
Level 3 Communications is a huge network provider. They sell all kinds of networking services, including IP transit, VOIP, and cloud services. Their primary ASN is AS3356. A network as large as Level 3’s is going to suffer outages from time to time. There are a number of tools you can use to see if Level…