Well, not exactly Fishin', but I'll be on a month long vacation starting today. I won't be posting (much) new content, so we'll all have a break. Disappointing, I know. Please use this time for quiet contemplation and other inappropriate activities. Au revoir!
By matching compute, storage, and networking resources for optimal utilization, the cluster-in-a-box wastes nothing.
We all make mistakes. We type the wrong command. We use the wrong verb tense in an article. We leave out a critical step when explaining a process. It’s something that happens all the time. It’s avoidable through careful planning, but how do you handle things when the avoidable becomes unavoidable?
Once a mistake is out in the open and noticeable, it’s done. You can’t pretend it didn’t happen or that it’s not affecting things. That’s when you need to own up to what happened and fix it. Sometimes that’s not always easy. Even the best person is reticent to admit to being fallible. So the process for fixing a mistake isn’t always easy. But it is important.
Mitja Robas started his PowerShell for Networking Engineers presentation with a brief introduction to PowerShell and a few simple hands-on examples. Enjoy the videos ;)
NetCraftsmen's Peter Welcher offers his take on the networking skills that will be critical in the future.
We collect the top expert content in the infrastructure industry and fire it along the priority queue.
Been a while since my last update, been quite busy! but I thought I’d do a post on something BGP related, as everyone loves BGP!
There’s an interesting addition to BGP route-reflection that’s found it’s way into a few trains of code on Juniper and Cisco, (I assume it’s on others too) that attempts to solve one of the annoying issues that occurs when centralised route-reflectors are used.
It all boils down to the basics of path selection, in networks where the setup is relatively simple and identical routes are received, at different edge routers within the network – similar to anycast routing.
Consider the below lab topology;
The core of the network is super simple, basic ISIS, basic LDP/MPLS with ASR-9kv as an out-of-path route-reflector, with iBGP adjacencies configured along the green arrows, the red arrows signify the eBGP sessions, between AS 100-200 and AS 100-300, where IOSv-7 and IOSv-8 advertise an identical 6.6.6.6/32 route. IOSv-3 and IOSv-4 are just P routers running ISIS/LDP only, for the sake of adding a few hops.
With everything configured as defaults, lets look at the path selection;
iosv-1#show ip bgp
BGP table version is 6, local router ID is Continue reading
The post Worth Reading: Nosy neighbors and cloud privacy appeared first on rule 11 reader.
Antenna Characteristics
Different antennas are needed for different applications. An open office space is very different to to a strip of closed offices. How do you cover a large open area such as a lobby? Covering an outdoor area is different than an indoor one and so on.
Radiation Patterns
Antenna gain is normally measured against an isotropic antenna, measured in dBi. This antenna only exists in theory though. It’s shaped like a tiny round point that when alternating current is applied, radiates a signal equally in all directions, in the form of an ever-expanding sphere.
The relative signal strength around an antenna, showed on a plot, is known as the radiation pattern.
The radiation pattern can be shown in a three-dimensional plot in form of a sphere where XY plane lies flat along the horizon and the XZ plane lies vertically along the elevation of the sphere. The first plane is referred to as H plane, horizontal, or also as the azimuth plane. The second one is known as the E plane, elevation.
Polar plots can also be used where concentric circles represent relative changes in signal strength as measured at a constant distance from Continue reading