1
00:00:00,760 --> 00:00:05,350
At the moment, rather one is able to ping or out of five acting as PC two.

2
00:00:05,590 --> 00:00:08,800
And that's because we've configured a tunnel.

3
00:00:11,590 --> 00:00:16,320
But we've also configured ERP to learn remote routes.

4
00:00:16,329 --> 00:00:23,500
So ERP has learnt about network ten 120 via ten 132 through Tunnel zero.

5
00:00:24,310 --> 00:00:32,800
So if we removed ERP, rather, one would no longer be able to ping right of five.

6
00:00:33,630 --> 00:00:40,260
Because rather to has no route to get to that network.

7
00:00:40,260 --> 00:00:46,980
It can send the traffic of via rider three, but rather three also has no visibility of that network.

8
00:00:47,190 --> 00:00:52,290
So on router three, show IP route shows us only directly connected interfaces.

9
00:00:52,710 --> 00:01:00,900
So in this example, it's enable OSPF so rather OSPF one network.

10
00:01:01,890 --> 00:01:09,810
And I'll once again only enable OSPF on network ten, not on network four.

11
00:01:10,920 --> 00:01:13,380
Show IP OSPF interface.

12
00:01:14,450 --> 00:01:15,720
And let's do a brief.

13
00:01:18,780 --> 00:01:23,730
OSPF is enabled on tunnel zero and on Fost Ethernet zero zero.

14
00:01:24,030 --> 00:01:27,150
Notice the cost is very high and it's a point to point link.

15
00:01:27,690 --> 00:01:32,130
We need to configure router for router four.

16
00:01:32,130 --> 00:01:37,170
So the neighbor relationship go down to router two when we remove the IGP.

17
00:01:38,150 --> 00:01:40,460
So now let's remove Ethiopia and rather for.

18
00:01:41,860 --> 00:01:56,620
And enable OSPF so network ten 000 with the relevant mask show ip ospf interface brief before presenter

19
00:01:56,620 --> 00:01:58,870
notice the neighbor relationship has already come up.

20
00:02:00,000 --> 00:02:05,370
You can see tunnel zero and Foster Ethernet zero zero have OSPF enabled on them.

21
00:02:06,400 --> 00:02:13,870
So IP OSPF neighbor neighbor relationship to ten 131 is full notice.

22
00:02:13,870 --> 00:02:21,190
It's a point to point link so we don't see any election taking place but rather for now has a relationship

23
00:02:21,190 --> 00:02:25,210
directly to rather two through tunnel zero.

24
00:02:25,330 --> 00:02:27,160
So show IP route.

25
00:02:28,220 --> 00:02:37,580
We have now learnt about a Route ten 110 through OSPF from this neighbor rather to through tunnel zero.

26
00:02:37,940 --> 00:02:42,470
So can router one now ping router five and the answer is yes.

27
00:02:42,650 --> 00:02:51,560
So we've successfully changed the writing protocol used across the jury tunnel from IP to OSPF rather

28
00:02:51,560 --> 00:02:55,400
one can trace as an example to router five.