1 00:00:00,500 --> 00:00:03,800 So Ken wrote a one ping rate of five. 2 00:00:03,800 --> 00:00:05,900 So ping tended one to 2 to 2. 3 00:00:08,970 --> 00:00:10,470 At the moment, the pings are failing. 4 00:00:10,470 --> 00:00:14,040 So let's do a traceroute to 10.1 or 2 to 2. 5 00:00:14,160 --> 00:00:20,820 So we get to 10.101 or two, which is rather two, and then things seem to stop working. 6 00:00:21,780 --> 00:00:24,150 Let's do a debug IP ICMP. 7 00:00:25,430 --> 00:00:26,750 And try and ping. 8 00:00:28,530 --> 00:00:29,850 REPORTER five again. 9 00:00:32,800 --> 00:00:34,390 Nothing seems to be happening. 10 00:00:34,540 --> 00:00:39,190 So let's check on rather to what the IP routing table looks like. 11 00:00:39,580 --> 00:00:42,730 We can see network 4.1.1.0. 12 00:00:42,760 --> 00:00:47,740 We can in other words, this network we can see network 10.1 or 3.0. 13 00:00:47,770 --> 00:00:52,270 In other words, this network we can see network ten .1.1.0. 14 00:00:52,300 --> 00:00:57,790 In other words, this network, we have a default route to router three. 15 00:00:58,090 --> 00:01:02,350 But remember that rather three doesn't have visibility of this network. 16 00:01:02,980 --> 00:01:07,210 If rather two forwards of that traffic to router three, it's going to go nowhere. 17 00:01:07,540 --> 00:01:13,180 So what we need to do is we need to run a routing protocol on router two and router four so that this 18 00:01:13,180 --> 00:01:16,390 network is advertised to router two through the tunnel. 19 00:01:16,390 --> 00:01:22,420 So that router two forwards traffic to router five through the tunnel of via router four. 20 00:01:23,850 --> 00:01:26,240 So we should enable it some kind of writing protocol. 21 00:01:26,250 --> 00:01:28,860 I'm going to enable ERP to keep it simple. 22 00:01:29,760 --> 00:01:32,430 The network that I'll enable is Network ten. 23 00:01:32,460 --> 00:01:36,810 So in other words, I'm not going to enable IGP on the serial interface. 24 00:01:36,810 --> 00:01:41,010 It's going to be enabled on the first Ethernet and tunnel interfaces only. 25 00:01:42,060 --> 00:01:48,120 I'll disable auto summarization to show IP IGP interfaces. 26 00:01:48,450 --> 00:01:54,240 Shows me that IGP is running on Fast Ethernet zero zero and the tunnel interface. 27 00:01:54,240 --> 00:01:56,520 It's not running on the serial interface. 28 00:01:57,210 --> 00:02:07,200 On Router four, we can do something similar cerrado IGP 100 Network 10.02020 no order summary and notice 29 00:02:07,200 --> 00:02:14,310 as soon as I did that a neighbor relationship was established to neighbor 10.1 to 3.1. 30 00:02:14,670 --> 00:02:19,500 A resync was made after I enabled no order summary to that neighbor. 31 00:02:19,590 --> 00:02:29,280 So once again, show IP ERP interfaces shows that IGP is enabled on fast Ethernet zero zero as well 32 00:02:29,280 --> 00:02:34,500 as the tunnel interface show IP dropping neighbors. 33 00:02:35,220 --> 00:02:42,510 We can see an IGP neighbor ten .1.3.1 directly connected through tunnel zero. 34 00:02:42,690 --> 00:02:46,920 The point is, and forgive the pun, this is a point to point link. 35 00:02:46,920 --> 00:02:54,690 So logically router two and router four are directly connected to each other and IGP sees them as directly 36 00:02:54,690 --> 00:02:55,920 connected neighbors. 37 00:02:56,430 --> 00:02:58,710 So in order to show IP route. 38 00:02:59,330 --> 00:03:07,160 We now see a route to 10.1 or 2.0 slash 24 via tunnel zero. 39 00:03:07,400 --> 00:03:13,040 This was learnt through escape from neighbour 10.1 or 3.2. 40 00:03:13,340 --> 00:03:20,960 Rather to now has visibility of this network so can write a one ping route of five. 41 00:03:23,820 --> 00:03:30,300 There was a slight time out, but notice the ping now succeeds and we can see the output in the debug. 42 00:03:30,660 --> 00:03:39,720 We received an echo reply en route of five just to make the point debug ip, icmp or ping from router 43 00:03:39,720 --> 00:03:43,950 one once again and notice the ping succeeds, we can see the output. 44 00:03:44,760 --> 00:03:51,150 So we've now successfully configured a jury tunnel from router to two out of four and router one can 45 00:03:51,150 --> 00:03:53,250 ping root of five. 46 00:03:53,250 --> 00:03:58,560 But remember router three has no visibility of the networks. 47 00:03:59,600 --> 00:04:07,460 Rather three only sees Network 4.1.1.0 and Network 4.122.0. 48 00:04:07,730 --> 00:04:13,940 It has no visibility of this network ten 110 or this network ten 120. 49 00:04:14,600 --> 00:04:21,050 So let's look at some of the show commands available for grid tunnels and do some additional Wireshark 50 00:04:21,050 --> 00:04:21,800 captures.