I previously discussed using LISP to optimize your client-server traffic so today I’ll discuss the reverse direction: Egress Path Optimization from the Server to the Client. Let’s go over the need for Path Optimization in the direction from Server-to-Client with some pictures and explanations.
The Virtual Machine (VM) server is configured with a default gateway IP address, 192.168.1.1, which is the next hop IP address that the VM will forward packets towards as the traffic returns to the client outside the data center. In this data center environment, we’ve deployed the default gateway using the First Hop Redundancy Protocol (FHRP). In reality, FHRP is an umbrella technology term that includes Hot Standby Routing Protcol (HSRP) and Virtual Router Redundancy Protocol (VRRP), two main technologies that provide transparent failover and redundancy at the first hop IP router. Please see info on FHRP here.
Also notice that the VM default gateway is the same as the HSRP Virtual IP Address (VIP). The HSRP VIP binds itself to one of the physical HSRP Routers via an HSRP election process using Layer 2 control packets between the two physical HSRP Routers and this means that the VM default gateway, since it points to a VIP, may move between physical HSRP Routers, and of course which is then intent and design when using any type of FHRP.
In the above picture, the Path is Optimized from Server to Client, so now let’s take a look at what happens when we migrate the VM to the new data center.
This month, Cisco Chairman and CEO is attending his 12th World Economic Forum (WEF) in Davos, Switzerland. In this video he prepared for WEF, he answers the following questions.
What great transformation will the world see in the next decade?
What new models will drive change in your industry?
How can organizations build competitive innovation for the next generation?
How can your industry work with other stakeholders to improve the state of the world?
John states that the internet and business “innovation will drive GDP growth, job creation and productivity” in the next decade. He says that any device will be connected to any content and that video will be everywhere. Twitter, Facebook and YouTube, he says, will be in the enterprise, in their current form or in a more business-friendly form (note: such as Cisco Quad). He says that mobility will continue to grow in importance and the proliferation of devices will make the network and its security and policies even more important.
Solving the worlds problems, he says, takes bringing diverse people together…both physically, but more and more through collaborative platforms.
Watch the video and let us know what you think technology’s impact will have on our lives in the next decade.
Cisco kicked off the New Year with a significant milestone: we’ve reached over 50,000 users of personal mobile devices in the enterprise. In fact, while we’ve seen an upward trajectory of personal devices over the past two years, the major growth spurt was in the last calendar year – our total mobile device count grew 52% in 12 months. And no surprise: this was primarily seen in Apple devices. Read More »
I arrived at a recent networking event in London, known as “Digital Sizzle,” which was buzzing with activity. I looked around and wondered how this group came to fruition. Seriously, how do you get 300+ people — most who do not know each other — into a room together on a promise of free beer and BBQ? Read More »