1 00:00:00,770 --> 00:00:06,530 Another definition of software defined networking is software defined networking via API ease or application 2 00:00:06,530 --> 00:00:08,310 programming interfaces. 3 00:00:08,330 --> 00:00:15,470 In this vision rather than being tied to configuring a network device via a command line interface which 4 00:00:15,470 --> 00:00:16,900 is very restrictive. 5 00:00:17,090 --> 00:00:22,070 Why didn't we have richer programmatic interfaces on networking devices. 6 00:00:22,070 --> 00:00:28,890 An example would be let's use a RESTful API rather than a basic SEO lie. 7 00:00:29,030 --> 00:00:35,780 Other protocols like Ovi SDP a net conf could be used to programmatically change the configuration of 8 00:00:35,780 --> 00:00:37,460 a networking device. 9 00:00:37,460 --> 00:00:42,760 Now you may be thinking well I'll just use simple network management protocol or S&P. 10 00:00:43,030 --> 00:00:49,370 S&P has some restrictions and doesn't work particularly well when you want to change the configuration 11 00:00:49,370 --> 00:00:50,900 of a device. 12 00:00:50,900 --> 00:00:58,850 Another definition would be using ASX and I've put this as a separate vision of SDM and there will be 13 00:00:58,850 --> 00:01:04,190 a separate course on Cisco ECI using a protocol called a plex. 14 00:01:04,190 --> 00:01:13,160 Cisco purchased a startup called in semi and they have developed a vision of SD in using hardware or 15 00:01:13,390 --> 00:01:14,200 ASX. 16 00:01:14,270 --> 00:01:20,420 So the Cisco solution is very reliant on an async implementation and ties in with their nexus product 17 00:01:20,420 --> 00:01:21,300 line. 18 00:01:21,440 --> 00:01:26,690 Other terms you may come across include cloud automation using open stack. 19 00:01:26,690 --> 00:01:32,420 One of the visions with open stack is that we should be able to manage all our networking devices servers 20 00:01:32,510 --> 00:01:35,810 and storage from a single management console. 21 00:01:35,840 --> 00:01:38,840 We'll talk more about Open stack in a separate course. 22 00:01:38,840 --> 00:01:42,950 What about in a V or network function virtualization. 23 00:01:42,950 --> 00:01:50,750 I'd recommend that you visit the OPI in a V Web site for more details about in a V but to give you a 24 00:01:50,750 --> 00:01:58,580 very quick overview of NFP is why do you run specific operating systems on specific hardware to provide 25 00:01:58,580 --> 00:02:00,740 a function as an example. 26 00:02:00,740 --> 00:02:05,940 Why do you have a hardware firewall that just provides that function. 27 00:02:06,200 --> 00:02:12,590 In the past you had servers that had specific functions installed on specific hardware. 28 00:02:12,590 --> 00:02:20,450 As an example you may have had an Exchange server or a database server or a file server every server 29 00:02:20,450 --> 00:02:22,720 was running on dedicated hardware. 30 00:02:22,790 --> 00:02:25,840 Then a few years ago servers got virtualize. 31 00:02:26,270 --> 00:02:27,890 So you no longer run. 32 00:02:27,890 --> 00:02:34,070 For instance some server platforms on hardware you run them within virtual machines and typically you 33 00:02:34,070 --> 00:02:38,450 would run many virtual machines on a single hardware device. 34 00:02:38,630 --> 00:02:43,580 And there are many advantages to the virtualization of servers in the same way. 35 00:02:43,580 --> 00:02:46,870 Why don't we virtualize networking devices. 36 00:02:46,940 --> 00:02:56,240 So as an example we might virtualize a Cisco router using the CSR or an HP router using a VCR or a switch 37 00:02:56,540 --> 00:02:59,500 using obvious or open v switch. 38 00:02:59,510 --> 00:03:05,420 Many of us have encountered virtual switching in a VM way environment VM Where have virtual switches 39 00:03:05,420 --> 00:03:07,280 running in their hyper visors. 40 00:03:07,280 --> 00:03:13,790 So taking this a step further why don't we virtualize networking devices rather than having a dedicated 41 00:03:13,790 --> 00:03:16,180 rudder or a dedicated firewall. 42 00:03:16,190 --> 00:03:22,970 Why didn't we just run a VM with that function so we could virtualize a firewall or virtualize a router 43 00:03:23,470 --> 00:03:25,820 that we could take it a step further. 44 00:03:25,890 --> 00:03:32,570 So as an example rather than running a Windows operating system just to give me a specific application 45 00:03:32,570 --> 00:03:39,740 like a web server why don't we virtualize the operating system as well and run multiple applications 46 00:03:39,980 --> 00:03:47,270 separated from each other as if they're in different VMs or containers is a term that's often used today 47 00:03:47,660 --> 00:03:53,990 and separate the applications from each other but have multiple applications running on a single server 48 00:03:54,710 --> 00:04:01,310 in the same way why didn't we virtualize a function such as VR or P or a firewall function rather than 49 00:04:01,310 --> 00:04:04,220 running a full blown operating system per function. 50 00:04:04,250 --> 00:04:10,730 Why don't we run one operating system and just instantiate network functions and many of them on a single 51 00:04:10,730 --> 00:04:12,050 operating system. 52 00:04:12,080 --> 00:04:15,820 We'll talk more about in a V in a separate course. 53 00:04:15,880 --> 00:04:20,180 For now I'm going to introduce open SD and add a bit of open flow. 54 00:04:20,200 --> 00:04:27,360 Have a look at more detail courses available on genius 3 I will hopefully be discussing the details 55 00:04:27,360 --> 00:04:29,790 of all of these in upcoming courses.