1 00:00:00,000 --> 00:00:01,630 [No audio] 2 00:00:01,630 --> 00:00:02,586 Hello everyone. 3 00:00:02,768 --> 00:00:06,030 Since we are on a network configuration part 4 00:00:06,080 --> 00:00:09,322 of the Linux, we'll talk about NIC bonding. 5 00:00:09,466 --> 00:00:12,018 What exactly the NIC bonding is? 6 00:00:12,164 --> 00:00:14,454 Just to let you know, NIC bonding is 7 00:00:14,492 --> 00:00:17,206 one of the very important and critical aspect 8 00:00:17,338 --> 00:00:20,238 in Linux number configuration and this type of 9 00:00:20,264 --> 00:00:23,790 questions are asked oftentimes in an interview. 10 00:00:24,590 --> 00:00:28,846 So let's see a NIC. A NIC stands for Network 11 00:00:28,918 --> 00:00:33,200 Interface Card that is attached to your computer. 12 00:00:33,590 --> 00:00:36,934 So if you look at your laptop or behind your PC, 13 00:00:36,982 --> 00:00:39,498 you will see a little port in there and that port 14 00:00:39,524 --> 00:00:43,674 is your NIC. With NIC, which is Network Interface Card 15 00:00:43,772 --> 00:00:47,554 bonding is also known as network bonding. 16 00:00:47,722 --> 00:00:51,526 It can be defined as the aggregation or combination 17 00:00:51,598 --> 00:00:56,010 of multiple NIC into a single bond interface. 18 00:00:56,330 --> 00:00:57,894 Its main purpose is to 19 00:00:57,932 --> 00:01:00,538 provide high availability and redundancy. 20 00:01:00,694 --> 00:01:02,494 So let's look at our picture. 21 00:01:02,602 --> 00:01:06,019 We have this four NIC cards on our computer. 22 00:01:06,769 --> 00:01:10,422 So what we do in NIC bonding is we take two 23 00:01:10,496 --> 00:01:16,734 ports, we combine them together and the reason we combine them 24 00:01:16,772 --> 00:01:21,500 because what if one port dies, we still have another port. 25 00:01:21,890 --> 00:01:24,094 So this is for the redundancy. 26 00:01:24,262 --> 00:01:30,030 So another way to make two ports redundant or to 27 00:01:30,080 --> 00:01:33,330 have them high availability is you combine them together. 28 00:01:33,500 --> 00:01:35,874 If a port is one gig and the other 29 00:01:35,912 --> 00:01:38,946 port is one gig, you combine them together to 30 00:01:39,068 --> 00:01:42,490 aggregate them and get the throughput of two gigs. 31 00:01:42,610 --> 00:01:44,178 This is achieved for high 32 00:01:44,204 --> 00:01:46,470 availability and link aggregation. 33 00:01:47,090 --> 00:01:50,586 So NIC bonding procedure is that you type 34 00:01:50,648 --> 00:01:54,834 modprobe bonding, which is to get the 35 00:01:54,872 --> 00:01:57,262 configuration of your driver, info bonding 36 00:01:57,286 --> 00:01:59,086 to get the information of your bonding. 37 00:01:59,218 --> 00:02:02,934 Then you create a file called ifcfg-bond0. 38 00:02:03,032 --> 00:02:06,846 You edit the first ethernet1, you edit the second 39 00:02:06,908 --> 00:02:09,978 ethernet, and you combine them and point to bond0. 40 00:02:10,064 --> 00:02:12,642 If you have nic1 file, you create another 41 00:02:12,716 --> 00:02:15,738 nic2 file for the second NIC, and then 42 00:02:15,764 --> 00:02:18,306 you create a third file called bond0. 43 00:02:18,488 --> 00:02:20,634 You point your nic1 and 44 00:02:20,672 --> 00:02:24,620 nic2 files toward bond0. 45 00:02:25,130 --> 00:02:26,538 And then what do you do at the end? 46 00:02:26,564 --> 00:02:30,258 You restart the network of your computer. 47 00:02:30,404 --> 00:02:33,406 So the command is systemctl restart network. 48 00:02:33,538 --> 00:02:36,918 So without further ado, I will log into my system and 49 00:02:36,944 --> 00:02:40,400 I'll tell you exactly how NIC bonding can be done. 50 00:02:41,930 --> 00:02:43,926 And before we start this VirtualBox, 51 00:02:43,988 --> 00:02:46,138 I want you to take a snapshot. 52 00:02:46,234 --> 00:02:48,906 The reason I'm taking a snapshot is so we could 53 00:02:48,968 --> 00:02:52,554 work back to its state, which is where it is 54 00:02:52,592 --> 00:02:55,078 right now after we do all the configuration. 55 00:02:55,174 --> 00:02:57,694 So right here you see Snapshots. 56 00:02:57,742 --> 00:03:01,782 Click on Snapshot and right here it says Take. 57 00:03:01,856 --> 00:03:04,890 Click on the Take, leave the snapshot number 58 00:03:04,940 --> 00:03:07,640 1 as a name default and click OK, 59 00:03:08,150 --> 00:03:09,910 now it has taken the snapshot. 60 00:03:09,970 --> 00:03:13,470 Now I want you to click on Setting. 61 00:03:13,470 --> 00:03:15,410 [No audio] 62 00:03:15,410 --> 00:03:22,542 Go to Network, click on Network Adapter to check. 63 00:03:22,676 --> 00:03:28,590 Enable Network Adapter, and select Bridged Adapter. 64 00:03:29,210 --> 00:03:33,042 Now we will have two NICs on a computer 65 00:03:33,176 --> 00:03:36,606 which is one here Adapter 1 and Adapter 2. 66 00:03:36,788 --> 00:03:38,134 If you want more adapters, 67 00:03:38,182 --> 00:03:40,530 we could go to Adapter 3 and 4, and 68 00:03:40,580 --> 00:03:43,350 check on Enable Network Adapter, but we will work 69 00:03:43,400 --> 00:03:46,040 only Adapter 1 and Adapter 2 at this time. 70 00:03:46,970 --> 00:03:50,142 And I want you to click OK. So once the 71 00:03:50,156 --> 00:03:53,120 setting is done, go ahead and click on Start. 72 00:03:53,120 --> 00:04:00,270 [No audio] 73 00:04:00,270 --> 00:04:01,920 Go ahead and login as yourself. 74 00:04:01,920 --> 00:04:07,210 [No audio] 75 00:04:07,210 --> 00:04:10,262 Okay, when you have the Desktop, right click 76 00:04:10,336 --> 00:04:12,890 on your Desktop, and open up your terminal. 77 00:04:12,890 --> 00:04:14,830 [No audio] 78 00:04:14,830 --> 00:04:17,954 I would like to make the 79 00:04:17,992 --> 00:04:20,209 console, the terminal a little bigger. 80 00:04:21,850 --> 00:04:24,101 Okay, go ahead and type ifconfig, 81 00:04:24,245 --> 00:04:27,510 and do more on the output. 82 00:04:27,690 --> 00:04:30,266 And here you will see now 83 00:04:30,388 --> 00:04:33,318 we have two network interfaces. 84 00:04:33,414 --> 00:04:40,253 One is enp0s3, and the second one is enp0s8. 85 00:04:40,253 --> 00:04:46,602 enp0s8 is the one that we just added to our Oracle VirtualBox. 86 00:04:46,796 --> 00:04:49,554 Now what we want to do is we want to 87 00:04:49,592 --> 00:04:54,498 combine these two, 3 and 8 together and make a 88 00:04:54,524 --> 00:04:57,355 bond out of these two interfaces. 89 00:04:57,355 --> 00:04:59,458 [No audio] 90 00:04:59,458 --> 00:05:07,360 Become root first, let's clear the screen. 91 00:05:08,950 --> 00:05:13,262 Now I will open up a document that I have 92 00:05:13,336 --> 00:05:16,890 that has all the commands and configuration in my document. 93 00:05:17,070 --> 00:05:21,810 This document is also added as part of your handouts. 94 00:05:21,930 --> 00:05:25,298 So before you do this exercise, I want you 95 00:05:25,324 --> 00:05:27,978 to also open up this document from your handouts. 96 00:05:28,074 --> 00:05:29,678 Have it side by side while 97 00:05:29,704 --> 00:05:31,566 you do the configuration of bonding. 98 00:05:31,698 --> 00:05:34,010 So I have already opened this document. 99 00:05:34,010 --> 00:05:37,250 [No audio] 100 00:05:37,250 --> 00:05:40,270 Okay, so now it says just follow the directions. 101 00:05:40,330 --> 00:05:43,342 It says, Add a new NIC if it does not exist. 102 00:05:43,486 --> 00:05:47,194 Install bonding driver = modprobe bonding. 103 00:05:47,302 --> 00:05:49,254 You need to install this if 104 00:05:49,292 --> 00:05:51,094 you don't have bonding enabled. 105 00:05:51,142 --> 00:05:53,430 But let's say if you do have it or not, so do 106 00:05:53,480 --> 00:05:59,060 modinfo bonding, and I want you to do more on it. 107 00:05:59,510 --> 00:06:01,938 And once you do more, and if you 108 00:06:01,964 --> 00:06:08,142 get the output and description says Ethernet Channel Bonding Driver, v3.7.1, 109 00:06:08,276 --> 00:06:11,338 that means you already have the driver installed, 110 00:06:11,434 --> 00:06:13,702 which is the modprobe in Linux, 111 00:06:13,786 --> 00:06:16,050 so you don't have to worry about installing it. 112 00:06:16,100 --> 00:06:18,140 So you can move on to the next step. 113 00:06:19,070 --> 00:06:21,642 Okay, the next step is to create a 114 00:06:21,656 --> 00:06:27,414 new file called ifcfg-bond0 right here. 115 00:06:27,572 --> 00:06:30,270 And I have to create this file 116 00:06:30,770 --> 00:06:34,462 in this directory, in this path. 117 00:06:34,606 --> 00:06:37,134 So if I copy and paste it's not going to work. 118 00:06:37,172 --> 00:06:38,610 So I have to type it. 119 00:06:38,780 --> 00:06:41,730 So I go back into our machine 120 00:06:42,110 --> 00:06:47,550 and I'll do vi /etc/sysconfig/network 121 00:06:49,562 --> 00:06:56,086 -scripts/ifcfg-bond0. 122 00:06:56,086 --> 00:06:58,290 [No audio] 123 00:06:58,290 --> 00:07:00,074 Now you are in vi mode. 124 00:07:00,122 --> 00:07:02,602 Hit i to insert, and I want you 125 00:07:02,616 --> 00:07:07,320 to start typing exactly what's written in there. 126 00:07:07,710 --> 00:07:09,850 Please make sure don't make a mistake. 127 00:07:09,850 --> 00:07:13,390 [No audio] 128 00:07:13,390 --> 00:07:14,810 TYPE is Bond. 129 00:07:15,790 --> 00:07:19,894 Name of this bond is bond0. 130 00:07:19,894 --> 00:07:22,572 [No audio] 131 00:07:22,572 --> 00:07:28,050 BONDING_MASTER, meaning who's the master of this bonding? 132 00:07:28,610 --> 00:07:29,406 It's a self, 133 00:07:29,468 --> 00:07:34,306 so yes. So BOOTPROTO, 134 00:07:34,306 --> 00:07:41,790 [No audio] 135 00:07:41,790 --> 00:07:45,478 so when you type none or static, it means the same thing. 136 00:07:45,504 --> 00:07:51,894 So type none. ONBOOT yes. 137 00:07:51,894 --> 00:07:59,068 [Author typing] 138 00:07:59,068 --> 00:08:00,937 IPADDRESS 139 00:08:00,937 --> 00:08:04,530 [Author typing] 140 00:08:04,530 --> 00:08:06,422 I'm sorry, there's a little mistake. 141 00:08:06,566 --> 00:08:11,280 It should be just IPADDR. 142 00:08:12,090 --> 00:08:20,294 The IP that I have picked is 192.168.1.80 143 00:08:20,402 --> 00:08:23,482 because I have already typed this IP before and I 144 00:08:23,556 --> 00:08:27,682 know this IP does not exist, nobody has taken it. 145 00:08:27,756 --> 00:08:31,042 But if you wanted to confirm if this IP is not taken, 146 00:08:31,176 --> 00:08:34,798 you could just go into, you could open up another terminal and 147 00:08:34,823 --> 00:08:39,634 do ping 192.168.1.80, and you will 148 00:08:39,672 --> 00:08:43,390 see you are not getting a response back on that IP. 149 00:08:43,950 --> 00:08:47,542 So it means it's not taken. 150 00:08:47,676 --> 00:08:49,046 So I'll use IP. 151 00:08:49,118 --> 00:08:50,977 I'm assigning the static IP. 152 00:08:50,977 --> 00:09:00,490 NETMASK 255.255.255.0. GATEWAY, 153 00:09:01,590 --> 00:09:06,130 Gateway is the IP address of your modem. 154 00:09:07,590 --> 00:09:16,272 And then BONDING_OPTS equal mode = 5. 155 00:09:16,416 --> 00:09:17,686 I'm picking mode five. 156 00:09:17,748 --> 00:09:21,960 And what exactly mode five is or miimon is? 157 00:09:22,470 --> 00:09:26,520 This is speed and the state. 158 00:09:27,030 --> 00:09:29,770 I have also included that in my 159 00:09:29,820 --> 00:09:32,542 document exactly what these options mean. 160 00:09:32,676 --> 00:09:34,282 And I want you to review them and 161 00:09:34,296 --> 00:09:35,722 you will know exactly what it means. 162 00:09:35,796 --> 00:09:39,070 So now you could just save and exit the file. 163 00:09:39,070 --> 00:09:42,070 [No audio] 164 00:09:42,070 --> 00:09:45,198 Okay. Once you have that, it says bonding 165 00:09:45,294 --> 00:09:47,174 options detail can be found here. 166 00:09:47,212 --> 00:09:50,238 You see right here, it has all the options we picked. 167 00:09:50,274 --> 00:09:51,662 If you remember, we picked option 168 00:09:51,736 --> 00:09:54,606 five, which is transmit load balancing. 169 00:09:54,798 --> 00:09:56,380 You could read about it. 170 00:09:57,550 --> 00:10:02,210 And thenmiimon, which is a monitoring link, 171 00:10:02,260 --> 00:10:05,306 monitoring frequency in milliseconds we picked 100. 172 00:10:05,488 --> 00:10:10,386 Okay, so next step is it says, Edit 173 00:10:10,518 --> 00:10:14,378 the first NIC file, which is enp0s3. 174 00:10:14,524 --> 00:10:17,394 So I am in root directory. 175 00:10:17,442 --> 00:10:20,030 I'll go into /etc/sysconfig. 176 00:10:21,550 --> 00:10:23,438 Just drag this a little more so 177 00:10:23,464 --> 00:10:24,940 you could see it a little better. 178 00:10:25,390 --> 00:10:28,542 sysconfig cd network-script. 179 00:10:28,626 --> 00:10:30,998 And in this directory I already have 180 00:10:31,024 --> 00:10:36,718 a file called ifcfg-enp0s3. Do vi, 181 00:10:36,874 --> 00:10:40,530 and now I have here I said delete the entire content. 182 00:10:40,580 --> 00:10:42,778 So how do you delete it? In the vi 183 00:10:42,814 --> 00:10:44,990 you do dd, dd, dd, dd. 184 00:10:44,990 --> 00:10:48,174 Keep doing dd until you go to the bottom. 185 00:10:48,332 --> 00:10:50,938 You are at the bottom and it says, No lines in buffer. 186 00:10:50,974 --> 00:10:52,722 That's good. Now hit Enter. 187 00:10:52,856 --> 00:10:55,530 Sorry, hit insert. 188 00:10:56,570 --> 00:10:58,026 You probably have to hit insert a 189 00:10:58,028 --> 00:10:59,334 couple of times to get it. 190 00:10:59,432 --> 00:11:02,010 So now keep typing what exactly it's in there? 191 00:11:02,120 --> 00:11:10,596 So TYPE = Ethernet, BOOTPROBE = none, 192 00:11:11,596 --> 00:11:12,596 DEVICE 193 00:11:12,596 --> 00:11:14,816 [No audio] 194 00:11:14,816 --> 00:11:17,435 enp0s3. 195 00:11:17,435 --> 00:11:20,672 [No audio] 196 00:11:20,672 --> 00:11:26,066 ONBOOT = yes, you want to have that boot. HWADDR, 197 00:11:26,128 --> 00:11:27,338 this is a new one. 198 00:11:27,484 --> 00:11:33,730 Now this is the Mac address of your enp0s3. 199 00:11:33,730 --> 00:11:36,700 So what is my hardware Mac address? 200 00:11:37,630 --> 00:11:41,178 You have to open up another terminal in the back, drag 201 00:11:41,214 --> 00:11:46,300 it, and then just type ifconfig, and do more. 202 00:11:47,410 --> 00:11:52,480 And you will see enp0s3 has a Mac address of this. 203 00:11:52,480 --> 00:11:55,070 [No audio] 204 00:11:55,070 --> 00:11:59,574 So what I will do is, I'll drag this a little bit on 205 00:11:59,612 --> 00:12:03,980 top, I'll bring the other window in the back. 206 00:12:05,450 --> 00:12:24,003 And now I could type the address 08:00:27:c3:0e:28. 207 00:12:24,270 --> 00:12:28,200 Verify it, 27:c3:0e:28. Yes 208 00:12:29,130 --> 00:12:33,250 And then hit enter. MASTER, 209 00:12:34,770 --> 00:12:36,638 it's asking you who's your master? 210 00:12:36,734 --> 00:12:39,034 The master is bond0, which is the other 211 00:12:39,072 --> 00:12:42,662 file that we created before that, hit Enter, SLAVE. 212 00:12:42,746 --> 00:12:43,694 Are you a SLAVE? 213 00:12:43,802 --> 00:12:46,118 Meaning this interface, is it a slave? 214 00:12:46,214 --> 00:12:47,340 We'll say yes. 215 00:12:48,450 --> 00:12:52,620 Check again. BOOTPROTO, we missed one. 216 00:12:53,550 --> 00:12:55,078 Oh, no, we did not. It's there. 217 00:12:55,164 --> 00:13:00,262 TYPE, BOOTPROTO, DEVICE, ONBOOT, HWADDR which is 218 00:13:00,276 --> 00:13:03,758 the Mac address, MASTER bond0, and SLAVE. 219 00:13:03,914 --> 00:13:05,470 Now save and exit. 220 00:13:06,750 --> 00:13:11,290 Okay, now follow the directions. 221 00:13:12,870 --> 00:13:15,286 Okay, now it says create the second 222 00:13:15,348 --> 00:13:17,770 NIC file for emp0s8. 223 00:13:17,880 --> 00:13:20,234 I could create a second one, or I could just copy 224 00:13:20,282 --> 00:13:24,610 this, enp0s3 and change the name and Mac address 225 00:13:24,660 --> 00:13:25,762 so it would be easier, I could 226 00:13:25,776 --> 00:13:39,073 just copy enp0s3, and I name it icfcg-enp0s3, and take out, 227 00:13:39,073 --> 00:13:40,666 replace 3 with 8. 228 00:13:40,788 --> 00:13:41,918 Now it's copied. 229 00:13:42,074 --> 00:13:46,879 Now vi ifcfg-enp0s8, 230 00:13:46,879 --> 00:13:49,181 now it's 0s8, 231 00:13:49,181 --> 00:13:52,952 you have to change this 3rd line which says DEVICE, 232 00:13:52,952 --> 00:13:55,522 0s3 with 8, 233 00:13:56,223 --> 00:13:57,386 yes, yes. 234 00:13:57,448 --> 00:13:59,714 And now the Mac address would be different. 235 00:13:59,872 --> 00:14:03,340 Go back to your other command that is open, 236 00:14:03,670 --> 00:14:05,858 drag it up and you will see here, the 237 00:14:05,884 --> 00:14:09,974 Mac address for enp0s8 is this one. 238 00:14:10,012 --> 00:14:12,042 So once you have it highlighted, drag 239 00:14:12,066 --> 00:14:13,660 it down so you could see it. 240 00:14:14,050 --> 00:14:15,580 And now change it. 241 00:14:16,210 --> 00:14:18,710 It is changed after the three optics. 242 00:14:18,710 --> 00:14:24,983 So 0d:17:9b. 243 00:14:24,983 --> 00:14:29,510 Okay, bond0, master is the bond0. Slave, 244 00:14:29,510 --> 00:14:33,066 yes, I am a slave for bond0. 245 00:14:33,248 --> 00:14:36,754 Then write quit, and save the file. 246 00:14:36,862 --> 00:14:38,158 The file is saved. 247 00:14:38,314 --> 00:14:46,654 Now I want to restart the service systemctl, restart the network 248 00:14:46,702 --> 00:14:48,526 service, network restart, 249 00:14:48,658 --> 00:14:50,660 hit enter, by running 250 00:14:51,470 --> 00:14:55,410 ifconfig do the more on it. And you'll see 251 00:14:55,460 --> 00:14:57,210 now the IP that I have 252 00:14:57,260 --> 00:15:01,426 assigned says right here 192.168.1.80. 253 00:15:01,558 --> 00:15:04,506 It's master and the other ports, sorry, 254 00:15:04,568 --> 00:15:08,010 other NICs enp0s3 and s8, 255 00:15:08,060 --> 00:15:09,222 you see here, right here, it 256 00:15:09,236 --> 00:15:12,210 says these are SLAVE and SLAVE. 257 00:15:12,530 --> 00:15:17,110 So IP assigned is given 192.168.1.80. 258 00:15:17,230 --> 00:15:19,854 I'm going to take this IP, plug it into my 259 00:15:19,892 --> 00:15:22,460 PuTTY session and see if I could connect to it. 260 00:15:22,790 --> 00:15:28,100 192.168.1.80. Hit enter. 261 00:15:28,970 --> 00:15:30,030 Yes, I could connect. 262 00:15:30,080 --> 00:15:32,706 This is just the SSH key warning sign. 263 00:15:32,768 --> 00:15:35,034 You could just accept it to save it 264 00:15:35,192 --> 00:15:41,218 and log in and yes, there you go. 265 00:15:41,244 --> 00:15:45,250 So now you know that your interface is 266 00:15:45,420 --> 00:15:50,580 combined together and pointing it to bond0. 267 00:15:51,210 --> 00:15:54,550 Any other instructions that we have, you could go down. 268 00:15:54,660 --> 00:15:57,298 You can also see here, it's telling me 269 00:15:57,324 --> 00:16:02,786 that I could verify the setting by doing 270 00:16:02,848 --> 00:16:09,302 cat /proc/net/bonding/bond0. 271 00:16:09,436 --> 00:16:14,630 When I do that, let me make this bigger, 272 00:16:15,970 --> 00:16:19,120 and now you'll see here when I did the cat 273 00:16:19,510 --> 00:16:23,834 you see it says Currently Active Slave is this one. 274 00:16:23,992 --> 00:16:26,774 It is load balancing. Slave Interface is 275 00:16:26,812 --> 00:16:29,258 this, and second Slave Interface is this. 276 00:16:29,344 --> 00:16:31,862 Now, once it is done, I want you 277 00:16:31,876 --> 00:16:35,190 to revert back to your original VM. 278 00:16:35,250 --> 00:16:38,140 So just close it, power it off. 279 00:16:38,590 --> 00:16:40,970 Close and says power off the machine. 280 00:16:41,290 --> 00:16:42,542 You power it off. 281 00:16:42,676 --> 00:16:45,700 Now go to your Oracle virtual machine right here. 282 00:16:46,270 --> 00:16:49,418 And first once wait for it to power off, 283 00:16:49,444 --> 00:16:52,926 then go to Settings and then come to Network, 284 00:16:53,118 --> 00:16:55,286 go to network Adapter 2. 285 00:16:55,468 --> 00:16:58,970 Unchecked the one we checked before. Click 286 00:16:59,020 --> 00:17:01,914 OK, now it should not have the second adapter. 287 00:17:02,082 --> 00:17:04,718 But I want you to click now to 288 00:17:04,742 --> 00:17:07,962 the Snapshot 1, and click on Restore. 289 00:17:08,106 --> 00:17:09,962 Now this is going to restore to the 290 00:17:09,976 --> 00:17:12,040 original state where we had it before. 291 00:17:12,430 --> 00:17:16,190 Here it will create another snapshot of your 292 00:17:16,240 --> 00:17:18,326 current state which I don't want you to 293 00:17:18,328 --> 00:17:21,470 do, so uncheck this box and click Restore. 294 00:17:22,030 --> 00:17:25,502 Now it is restored to exactly same way 295 00:17:25,576 --> 00:17:28,367 where it was before we started this lesson. 296 00:17:28,750 --> 00:17:30,402 All right guys, I hope you enjoyed 297 00:17:30,425 --> 00:17:32,079 it and please try right on. 298 00:17:32,530 --> 00:17:35,462 This is one of the topic that's very important. 299 00:17:35,536 --> 00:17:38,306 You will be working on a physical machines most of 300 00:17:38,308 --> 00:17:40,650 the time when you have to do network bonding. 301 00:17:40,650 --> 00:17:42,378 [No audio]