10G Ethernet (10GbE) is a very popular interconnect technology in today’s data center. It’s widely used for servers/storage devices connecting to top-of-rack (leaf) switches, as well as connecting those leaves to the aggregation (spine) switches. According to a Dell’Oro Ethernet Switch Market report published in 2014, 80% of server connections will be 10GbE-based by 2018.
In general, two types of physical media are used in 10GbE interconnects: fiber and copper. For intra-rack (server/storage to leaf switch) connections, most deployments use copper cabling as it is the most cost effective for short distances within the rack.
There are two copper cable types: twinax and twisted pair. Twinax is used in the 10GBASE-CR standard in the DAC (direct attached cable) format, which is a fixed length cable with SFP+ plugs integrated into both ends. Twisted pair, on the other hand, is something that should be very familiar to every IT person. Remember CAT cables and RJ-45? The 10GbE interconnect standard that uses twisted pair is 10GBASE-T, which is officially defined in the IEEE 802.3an standard.
10GBASE-CR with DAC is great and used in many deployments. However 10GBASE-T over twisted pair offers some unique benefits:
10GBASE-T over twisted pair Continue reading
Today I take a gentle swoop away from networking into the world of documentation. Specifically, I’m looking at a bug in Microsoft Office Word for Mac that drives me bonkers.
The management of custom properties in Microsoft Word has never been the most elegant part of Word’s interface. The mechanism by which the property values are managed has always been a bit clunky and unfriendly, but at least in the Windows version of Word, it at least functioned as stated.
In Office for Mac however, there’s a bug when you select a property to edit. Since it’s easier to show than tell, here’s a quick video demonstrating the issue.
Now isn’t that a silly bit of coding? Yes, I thought so too! Microsoft just announced availability of the Office 2016 Mac Preview, but sadly Document Properties is not yet available:
If you find out before I do, please let me know!
If you liked this post, please do click through to the source at Office Word 2011 – An Annoying Little Bug and give me a share/like. Thank you!