News
Articles, sustainability work, and the occasional take on what it means to keep critical systems running.
Filters
Tags
Year
What are NNI and UNI ports on access switches?
These distinctions are common in metro area networking were an ISP needs to keep track of their uplink and downlink ports. NNI ports = Network Interface Port = Uplink port = WAN ports. NNI port characteristics include…
What is localhost, 127.0.0.1 and loopback-address ? Hint: Different ways to reference your computer
tldr: the dns name Localhost or ip address 127.0.0.1 is a reserved network address that always mean YOUR OWN COMPUTER/HOST/NODE, these addreses are assigned to the loopback interface. Localhost or 127.0.0.1 are by…
KVM vs ILO/IDRAC/IPMI for out of band management
tldr: ILO is integrated and requires more configuration, KVM can be installed a top of rack switch but not give power on/off functionality like KVM more here soon
What is "Cut-through", "store and forward" and "fragment free" switching methods?
Switching methods forward layer 2 frames in different ways * Cut through * Store and forward * Fragment free Cut-through switching reads only the the destination part of mac header which means that the switch will begin…