1 00:00:09,550 --> 00:00:13,070 This is one of multiple SPF troubleshooting videos. 2 00:00:13,390 --> 00:00:21,690 In this scenario we've been told that rider 1 is not able to pain brought a full let's test that Ken 3 00:00:21,690 --> 00:00:31,920 wrote a paying the loot back brought a full answer is no show IP wrote We are receiving who is France. 4 00:00:31,930 --> 00:00:38,320 So we are receiving a raft for the looped back of routed to we are receiving a raft for Network 10 1 5 00:00:38,320 --> 00:00:39,370 2 0. 6 00:00:39,580 --> 00:00:46,320 But we are not receiving other runs show IP or SPF neighbor confirms that we have a neighbour relationship 7 00:00:46,350 --> 00:00:55,290 to brought it to so as an example we can ping the loop back of right to disable IP domain lookup to 8 00:00:55,290 --> 00:01:06,700 make trace raft complete quicker and let us see if we can trace to Rob for the trace in this example 9 00:01:06,700 --> 00:01:14,390 will not leave the local Rada because we don't have a gateway of last resort and we don't have a specific 10 00:01:14,390 --> 00:01:16,380 brought to quadruple full. 11 00:01:16,790 --> 00:01:21,150 So the traces simply dropped at the local Rada. 12 00:01:21,180 --> 00:01:27,250 Now what about trotted to show IP a whisper from neighbor rather to his neighbour relationship to RADA 13 00:01:27,250 --> 00:01:35,120 a one but doesn't have a neighbour relationship to RADA a three can run it to ping router three. 14 00:01:35,190 --> 00:01:36,550 Yes it can. 15 00:01:36,570 --> 00:01:40,540 So it doesn't look like it's an IP connectivity problem. 16 00:01:40,590 --> 00:01:47,400 It looks like it's something else Ken wrote a three ping right to yes it can show IP of SPF neighbor 17 00:01:48,210 --> 00:01:54,510 rather three has a neighbour relationship to write a for but not to write it too so we definitely have 18 00:01:54,510 --> 00:02:06,420 a problem between wrote a tune a three so in it to show IP or SPF interface brief or SPF is enabled 19 00:02:07,690 --> 00:02:16,880 on gigabit to 00 and gigabit 0 1 shows GDP neighbours shows us that rather a three is connected to gigabit 20 00:02:16,880 --> 00:02:28,370 to 0 1 so SPF is enabled on that interface the local Rod is a designated Rata back on not a 3 show IP 21 00:02:28,540 --> 00:02:38,800 SPF interface brief SPF is enabled on gigabit 00 and gigabit 0 1 we can see that crowd too is connected 22 00:02:38,850 --> 00:02:48,150 to gigabit 0 1 so 0 SPF is enabled on this interface and the local Rada believes that it's the designated 23 00:02:48,150 --> 00:02:58,370 Rada so we have to Rodders on the same segment thinking that they are the designated roads let's have 24 00:02:58,370 --> 00:03:07,390 a look at the interface without brief so show IPO SPF interface gigabits 0 1 we can see the IP address 25 00:03:07,450 --> 00:03:08,440 of the router. 26 00:03:08,470 --> 00:03:14,500 The area is area zero router ideas this network top is broadcast. 27 00:03:14,500 --> 00:03:16,340 Cost is 1. 28 00:03:16,340 --> 00:03:19,620 There's no backup designated rudder on the segment. 29 00:03:19,840 --> 00:03:25,960 We can see the hollow and other timers we can see a lot of other information here. 30 00:03:25,960 --> 00:03:27,090 What about on this side. 31 00:03:27,120 --> 00:03:31,770 So show IP SPF interface gigabit 0 1. 32 00:03:31,830 --> 00:03:34,080 Can you spot the problem. 33 00:03:34,080 --> 00:03:42,970 What's the problem between Roddick to and wrote a three here's a two. 34 00:03:43,060 --> 00:03:44,860 He has wrought three. 35 00:03:45,010 --> 00:03:47,540 What's the problem OK. 36 00:03:47,540 --> 00:03:51,950 Look at the timer's 4 0 SPF to form neighbor relationships. 37 00:03:51,980 --> 00:04:00,270 The timers must be the same the hollow timer on Ryder 3 is 30 seconds whereas it's 10 seconds on right 38 00:04:00,320 --> 00:04:05,370 to dead interval on the side is 40 the side at 220. 39 00:04:05,630 --> 00:04:13,410 Wait is 40 hundred and twenty reruns but it's five and five also have a look at the network type. 40 00:04:13,410 --> 00:04:14,670 That's a broadcast. 41 00:04:14,670 --> 00:04:21,550 This is a non broadcast if you want SPF routers to form a neighbor relationship. 42 00:04:21,580 --> 00:04:23,050 The time is need to be the same. 43 00:04:24,300 --> 00:04:34,200 Timers can be influenced by the network command Ethernet is a broadcast multi access environment not 44 00:04:34,230 --> 00:04:42,310 a non broadcast environment that would be used for frame relay as an example. 45 00:04:42,310 --> 00:04:51,900 So we need to set the 0 SPF network type to broadcast and notice as soon as I've done that neighbor 46 00:04:51,910 --> 00:05:00,560 relationships are formed if you look at the time is noticed the timers here are now the same 47 00:05:04,310 --> 00:05:05,840 as Roger two. 48 00:05:06,020 --> 00:05:11,270 Time is a set the same show IP of SPF neighbors. 49 00:05:11,410 --> 00:05:18,590 We have two neighbor relationships set back on right of one is rather one able to trace two could ripple 50 00:05:18,590 --> 00:05:19,060 for. 51 00:05:19,780 --> 00:05:20,490 Yes it is. 52 00:05:20,500 --> 00:05:21,550 That looks a lot better. 53 00:05:21,640 --> 00:05:25,070 So we can ping could ripple for as an example. 54 00:05:26,260 --> 00:05:28,700 That was an SPF troubleshooting scenario. 55 00:05:28,780 --> 00:05:31,470 Make sure that your time is all the same. 56 00:05:31,480 --> 00:05:42,600 Check your network times no SPF it's important that the 0 SPF and network types be the same for CCMA. 57 00:05:42,710 --> 00:05:48,530 There are some weird and wonderful implementations that you can have with over SPF but that's not important 58 00:05:48,530 --> 00:05:51,530 for CCMA check your network types. 59 00:05:51,530 --> 00:05:55,970 Check your timers ensure that they the same between Rodders. 60 00:05:55,970 --> 00:05:57,370 Hope you enjoyed this video. 61 00:05:57,470 --> 00:06:00,670 If it was of benefit to you please like it. 62 00:06:00,980 --> 00:06:03,490 And please subscribe to my YouTube channel. 63 00:06:03,560 --> 00:06:05,180 I wish you all the very best.