WEBVTT 1 00:00.000 --> 00:04.880 All right, it's time to now configure the same port channel with LACP. 2 00:04.880 --> 00:08.720 I have gotten onto those interfaces, I have wiped the configurations, and I've 3 00:08.720 --> 00:09.000 placed 4 00:09.000 --> 00:10.560 them into a shutdown state. 5 00:10.560 --> 00:14.210 We're going to configure them for LACP, and from there we'll look at a couple 6 00:14.210 --> 00:14.880 of additional 7 00:14.880 --> 00:16.360 configurations. 8 00:16.360 --> 00:20.360 So on switch one here, I'm going to do a config T, interface range gig zero 9 00:20.360 --> 00:21.320 slash zero through 10 00:21.320 --> 00:26.840 three, and I'm just going to say channel group mode, whoops, for at the number. 11 00:26.840 --> 00:28.600 This time we'll just say port channel 10 each time. 12 00:28.600 --> 00:34.850 So channel group 10 mode, and then I see I can pick active and passive for LACP WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 12 00:28.600 --> 00:34.850 So channel group 10 mode, and then I see I can pick active and passive for LACP 13 00:34.850 --> 00:34.880 . 14 00:34.880 --> 00:39.300 So what I'm going to do is just set as I've got up here already active and 15 00:39.300 --> 00:40.080 passive on 16 00:40.080 --> 00:42.160 the diagram. 17 00:42.160 --> 00:45.920 And we just need active on one side in real world networks. 18 00:45.920 --> 00:50.610 Oftentimes we just use active everywhere, but we might as well go ahead and do 19 00:50.610 --> 00:51.160 active 20 00:51.160 --> 00:52.680 and passive make sure it comes up. 21 00:52.680 --> 00:55.280 So I'm going to say mode active on switch one. 22 00:55.280 --> 00:58.040 Same thing, it creates port channel 10's interface. 23 00:58.040 --> 01:03.360 Now I'm going to come over to switch to interface range zero slash zero through WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 23 00:58.040 --> 01:03.360 Now I'm going to come over to switch to interface range zero slash zero through 24 01:03.360 --> 01:04.760 three, and then 25 01:04.760 --> 01:07.880 channel group 10 mode. 26 01:07.880 --> 01:09.880 We said we do passive on this side. 27 01:09.880 --> 01:13.320 Now while I'm here, I'm going to say no shut to shut down the or do no shut on 28 01:13.320 --> 01:17.680 these interfaces. 29 01:17.680 --> 01:22.920 And then I'll do a show ether channel summary as these interfaces come online. 30 01:22.920 --> 01:24.920 We should see that this bundle comes up. 31 01:24.920 --> 01:26.280 All right, very good. 32 01:26.280 --> 01:31.800 So we see now that our port channel is listed with a protocol LACP. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 32 01:26.280 --> 01:31.800 So we see now that our port channel is listed with a protocol LACP. 33 01:31.800 --> 01:35.000 We see that our four parts are all online with capital P's. 34 01:35.000 --> 01:36.000 So that's a good thing. 35 01:36.000 --> 01:41.310 If I go to switch to and do a show either channel summary, one of the most 36 01:41.310 --> 01:42.720 common commands we 37 01:42.720 --> 01:47.730 use with ether channel, ether channel support, we see that all four of these 38 01:47.730 --> 01:48.920 ports are online 39 01:48.920 --> 01:49.920 as well. 40 01:49.920 --> 01:52.500 At this point, I know that there's no misconfiguration on the other side 41 01:52.500 --> 01:53.480 because it wouldn't have 42 01:53.480 --> 01:55.160 come up without LACP. 43 01:55.160 --> 01:58.920 If I were to do a config T and get onto one of these interfaces, let's say gig 44 01:58.920 --> 02:00.160 zero three WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 44 01:58.920 --> 02:00.160 zero three 45 02:00.160 --> 02:06.040 and do a no channel group 10 mode on. 46 02:06.040 --> 02:08.920 Take a quick look at the configuration to make sure that worked. 47 02:08.920 --> 02:09.920 Yeah. 48 02:09.920 --> 02:10.920 All right. 49 02:10.920 --> 02:13.560 So we don't have LACP configured anymore on that port. 50 02:13.560 --> 02:19.000 So show ether channel summary tells me that I only have three ports. 51 02:19.000 --> 02:21.000 So what's switch one going to say? 52 02:21.000 --> 02:27.880 Well, it already said that LACP is not enabled show ether channel summary. 53 02:27.880 --> 02:31.040 And we see that it's placed into a suspended state. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 53 02:27.880 --> 02:31.040 And we see that it's placed into a suspended state. 54 02:31.040 --> 02:33.160 So this is very important. 55 02:33.160 --> 02:38.420 I could have just created a loop by accidentally not including the fourth port 56 02:38.420 --> 02:39.640 ID, but because 57 02:39.640 --> 02:43.680 it's LACP, switch one simply places it into a suspended state. 58 02:43.680 --> 02:48.730 If I do a show interface gig zero slash three, we see that it's in this up down 59 02:48.730 --> 02:49.440 state, which 60 02:49.440 --> 02:54.140 doesn't happen very often, but we are told why in this case it has been 61 02:54.140 --> 02:55.080 suspended and 62 02:55.080 --> 02:58.320 it's referring to the ether channel suspension. 63 02:58.320 --> 03:00.160 So let's go ahead and fix that. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 63 02:58.320 --> 03:00.160 So let's go ahead and fix that. 64 03:00.160 --> 03:07.640 I'm going to get back onto int gig zero slash three channel group 10 mode. 65 03:07.640 --> 03:10.680 Actually, on this side, we said it was passive. 66 03:10.680 --> 03:12.400 There we go. 67 03:12.400 --> 03:14.200 So what if it's passive on both sides? 68 03:14.200 --> 03:19.840 Well, we could do that over here in range gig zero slash zero through three 69 03:19.840 --> 03:20.760 channel group 70 03:20.760 --> 03:22.240 10 mode passive. 71 03:22.240 --> 03:25.920 Let's just go ahead and shut these ports down. 72 03:25.920 --> 03:30.560 We'll do a no shot in the virtual world. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 72 03:25.920 --> 03:30.560 We'll do a no shot in the virtual world. 73 03:30.560 --> 03:35.640 Sometimes it helps to just give the interfaces of kicking the pants like that. 74 03:35.640 --> 03:39.840 So show ether channel summary. 75 03:39.840 --> 03:43.120 And we're going to see that they're all in the suspended state. 76 03:43.120 --> 03:46.610 Because as these error messages just scroll down by, let's see if we can find 77 03:46.610 --> 03:47.160 them there 78 03:47.160 --> 03:48.440 they are. 79 03:48.440 --> 03:50.720 They're all suspended because LACP is not enabled. 80 03:50.720 --> 03:52.640 But we know LACP is enabled. 81 03:52.640 --> 03:55.200 It's just also in the passive state. 82 03:55.200 --> 03:57.720 So two passive ports aren't going to come up here. 83 03:57.720 --> 04:02.260 We see the same errors on switch to where it says LACP is not enabled over WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 83 03:57.720 --> 04:02.260 We see the same errors on switch to where it says LACP is not enabled over 84 04:02.260 --> 04:03.000 there. 85 04:03.000 --> 04:07.760 So that is where we need to make sure that we have active on at least one side. 86 04:07.760 --> 04:10.200 So let's get back onto that range of interfaces. 87 04:10.200 --> 04:11.840 I'll do a shutdown on it. 88 04:11.840 --> 04:19.560 I'll change it to say channel group 10 mode active and then do a no shot. 89 04:19.560 --> 04:23.120 And that should bring our ether channel back online. 90 04:23.120 --> 04:24.120 So let's see here. 91 04:24.120 --> 04:30.100 If I do a show ether channel summary now, we should see that it is back online WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 91 04:24.120 --> 04:30.100 If I do a show ether channel summary now, we should see that it is back online 92 04:30.100 --> 04:30.720 all four 93 04:30.720 --> 04:34.720 ports here and show ether channel summary. 94 04:34.720 --> 04:36.040 I will say this. 95 04:36.040 --> 04:39.530 When you're running LACP, if it's up on one side, it's going to be up on the 96 04:39.530 --> 04:40.120 other. 97 04:40.120 --> 04:44.120 So LACP won't allow a port to be up on one side if it's not on the other. 98 04:44.120 --> 04:46.440 So there's probably redundant to check this. 99 04:46.440 --> 04:47.440 Okay. 100 04:47.440 --> 04:51.110 So let's go ahead and see what happens when we want to use that hot standby 101 04:51.110 --> 04:51.840 concept. 102 04:51.840 --> 04:58.040 What we're going to do is we're going to use the concept of a max bundle. 103 04:58.040 --> 05:03.240 The max bundle allows me to set a number, in our case, we're going to use two, WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 103 04:58.040 --> 05:03.240 The max bundle allows me to set a number, in our case, we're going to use two, 104 05:03.240 --> 05:03.400 to say 105 05:03.400 --> 05:07.160 that this is the max number of ports that should be bundled together. 106 05:07.160 --> 05:12.230 So we're going to do is we're going to create a situation where I've got two of 107 05:12.230 --> 05:12.880 them bundled 108 05:12.880 --> 05:17.320 together and the others are going to be known as hot standby. 109 05:17.320 --> 05:19.320 So they're going to we're going to see an H here. 110 05:19.320 --> 05:24.720 In fact, if we look just to the left, we see hot standby being a thing. 111 05:24.720 --> 05:26.880 Notice LACP only. 112 05:26.880 --> 05:29.640 So let's go ahead and do that. 113 05:29.640 --> 05:31.760 We're just going to clean up a little bit there. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 113 05:29.640 --> 05:31.760 We're just going to clean up a little bit there. 114 05:31.760 --> 05:32.760 There we go. 115 05:32.760 --> 05:35.440 So I'm going to use this max bundle command. 116 05:35.440 --> 05:37.840 It goes right on the port channel interface. 117 05:37.840 --> 05:40.920 So it can fig T interface port channel 10. 118 05:40.920 --> 05:48.840 And then I can say LACP max bundle two. 119 05:48.840 --> 05:49.840 There we go. 120 05:49.840 --> 05:50.840 Switch one. 121 05:50.840 --> 05:52.480 Let's do the same thing. 122 05:52.480 --> 05:54.880 Interface port channel 10. 123 05:54.880 --> 05:57.880 We need to make sure this goes on the LACP master. 124 05:57.880 --> 06:01.400 And you know, at this point, we'll just put it on both just in case. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 124 05:57.880 --> 06:01.400 And you know, at this point, we'll just put it on both just in case. 125 06:01.400 --> 06:06.320 T max bundle and we'll say two. 126 06:06.320 --> 06:08.280 All right. 127 06:08.280 --> 06:12.100 So what we should see is that they negotiate which of these ports is going to 128 06:12.100 --> 06:12.800 be excluded 129 06:12.800 --> 06:13.800 from the bundle. 130 06:13.800 --> 06:18.160 So let's go ahead and just do our show ether channel summary command. 131 06:18.160 --> 06:21.280 And we see that two of these ports have been placed in the hot standby. 132 06:21.280 --> 06:24.760 Now notice which ports were selected. 133 06:24.760 --> 06:29.240 Like zero slash zero and zero slash one were placed into primary operation, 134 06:29.240 --> 06:30.160 whereas zero WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 134 06:29.240 --> 06:30.160 whereas zero 135 06:30.160 --> 06:32.440 to zero three replaced in the hot standby. 136 06:32.440 --> 06:34.240 This was not an accident. 137 06:34.240 --> 06:38.660 This was very predictable because remember, we have the concept of port IDs and 138 06:38.660 --> 06:40.240 port priorities. 139 06:40.240 --> 06:41.960 And all the port priorities are the same. 140 06:41.960 --> 06:43.520 So what breaks the tie? 141 06:43.520 --> 06:45.360 The lower ports win. 142 06:45.360 --> 06:49.600 Usually if it's a layer two protocol, in our case, LACPs, I know we can make 143 06:49.600 --> 06:50.640 layer three 144 06:50.640 --> 06:54.580 port channels, but usually at that point, the bundle is still considered layer 145 06:54.580 --> 06:55.120 two, either 146 06:55.120 --> 06:59.490 way layer two, usually the lower priority wins layer three, usually the higher 147 06:59.490 --> 07:00.080 priority WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 147 06:59.490 --> 07:00.080 priority 148 07:00.080 --> 07:02.040 wins, something we can do to keep track. 149 07:02.040 --> 07:06.040 So in our case, the lower priority or lower port ID in this case wins. 150 07:06.040 --> 07:10.610 And therefore gig zero zero and gig zero one were placed into the bundle, 151 07:10.610 --> 07:11.000 whereas gig 152 07:11.000 --> 07:15.100 zero two and gig zero three were placed into hot standby. 153 07:15.100 --> 07:17.800 So that's a pretty cool way to see that. 154 07:17.800 --> 07:22.500 And if for any reason, let's just get onto an interface here and gig zero zero, 155 07:22.500 --> 07:22.960 we'll 156 07:22.960 --> 07:27.240 do a shut, we're going to quickly go to the other side as well into gig zero 157 07:27.240 --> 07:27.800 zero and 158 07:27.800 --> 07:31.390 shut because as a virtual environment, shutting one side doesn't immediately WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 158 07:27.800 --> 07:31.390 shut because as a virtual environment, shutting one side doesn't immediately 159 07:31.390 --> 07:32.120 shut the other 160 07:32.120 --> 07:33.120 side. 161 07:33.120 --> 07:34.360 So we want to shut both of these. 162 07:34.360 --> 07:39.480 And now if I run that same command on switch one, or really either one of these 163 07:39.480 --> 07:40.760 show ether 164 07:40.760 --> 07:43.960 channel summary. 165 07:43.960 --> 07:50.250 We will see that gig zero two, the next lowest port was placed into the bundle 166 07:50.250 --> 07:50.640 because gig 167 07:50.640 --> 07:52.280 zero zero is down. 168 07:52.280 --> 07:55.200 So how about that gig zero zero comes back online. 169 07:55.200 --> 07:58.940 This port will be placed back into the hot standby state and it keeps us cr 170 07:58.940 --> 07:59.640 anking with 171 07:59.640 --> 08:05.880 the number of the number of ports that we want in that bundle. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 171 07:59.640 --> 08:05.880 the number of the number of ports that we want in that bundle. 172 08:05.880 --> 08:08.560 So that is how we configure LACP. 173 08:08.560 --> 08:11.930 I will say that, you know, as far as verification is concerned, show ether 174 08:11.930 --> 08:12.840 channel summary is 175 08:12.840 --> 08:14.320 going to be one of our best friends. 176 08:14.320 --> 08:17.120 We're going to use this command an awful lot to see what's happening. 177 08:17.120 --> 08:21.300 We can do a show ether channel without the summary and get some interesting 178 08:21.300 --> 08:22.240 information. 179 08:22.240 --> 08:26.390 You'd almost think that this is a shortened form up here of what we'd get 180 08:26.390 --> 08:27.200 without the 181 08:27.200 --> 08:28.200 summary. 182 08:28.200 --> 08:31.000 Let me go ahead and wipe the drawing. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 182 08:28.200 --> 08:31.000 Let me go ahead and wipe the drawing. 183 08:31.000 --> 08:32.000 There we go. 184 08:32.000 --> 08:35.200 So, but it's really a bunch of different types of information. 185 08:35.200 --> 08:37.440 So it's not a bad command to run. 186 08:37.440 --> 08:41.800 And then we can also do a show interface port channel 10 and then tag on ether 187 08:41.800 --> 08:42.360 channel 188 08:42.360 --> 08:43.720 in the end. 189 08:43.720 --> 08:46.920 And we'll get some information about port channel 10. 190 08:46.920 --> 08:49.800 Tells us a little bit about the load on the individual interfaces, the amount 191 08:49.800 --> 08:50.280 of time it's 192 08:50.280 --> 08:53.120 been up, the protocol and so on and so forth. 193 08:53.120 --> 08:56.080 So some good verification commands here that we can run. 194 08:56.080 --> 08:59.510 But in the end, what we care about a lot, let's go back to that show spanning 195 08:59.510 --> 09:00.200 tree VLAN WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 195 08:59.510 --> 09:00.200 tree VLAN 196 09:00.200 --> 09:01.680 one command. 197 09:01.680 --> 09:06.510 Remember from a layer two perspective, we had all kinds of these gig zero zero 198 09:06.510 --> 09:07.320 interfaces 199 09:07.320 --> 09:08.320 up here. 200 09:08.320 --> 09:10.880 I know this is a bunch of interfaces. 201 09:10.880 --> 09:14.960 But notice gig zero zero through zero three doesn't show up in this list. 202 09:14.960 --> 09:20.110 What does show up is now they are unified behind a single logical layer two 203 09:20.110 --> 09:21.040 connection 204 09:21.040 --> 09:25.660 and that port channel can be placed individually as a whole into forwarding and 205 09:25.660 --> 09:26.600 blocking states 206 09:26.600 --> 09:28.280 and so on and so forth. 207 09:28.280 --> 09:31.750 So that's the value of ether channels and this is how we configure LACP WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000 207 09:28.280 --> 09:31.750 So that's the value of ether channels and this is how we configure LACP 208 09:31.750 --> 09:32.600 specifically.