1
00:00:07,410 --> 00:00:15,400
This is one of multiple videos discussing SPF designated Rada and back of the designated Rada elections.

2
00:00:15,540 --> 00:00:23,220
Have a look at this segment connected to this layer to switch which Rada will become the designated

3
00:00:23,220 --> 00:00:24,050
Rada.

4
00:00:24,060 --> 00:00:31,910
Will it be Rada one with this IP address 10 1 1 1 priority 100 or will it be right at 2 using the default

5
00:00:31,910 --> 00:00:35,170
priority an IP address 10 1 1 2.

6
00:00:35,300 --> 00:00:43,270
Or will it be rather 3 with a party of 20 IP addresses 10 1 1 3 or will it be write a 4 with a party

7
00:00:43,270 --> 00:00:51,760
of 0 IP address 10 1 1 4 which Rada will become the designated Rada on this segment.

8
00:00:51,760 --> 00:00:52,450
What do you think.

9
00:00:53,540 --> 00:00:56,690
So let's see if you can answer some additional questions.

10
00:00:56,760 --> 00:01:00,000
What is the default priority in 0 SPF.

11
00:01:00,000 --> 00:01:05,250
What happens when a Rada has a property of zero is it highest or lowest priority.

12
00:01:05,310 --> 00:01:08,520
That makes a hard to win an election.

13
00:01:08,520 --> 00:01:10,890
Is property even used.

14
00:01:10,890 --> 00:01:12,740
Is it highest or lowest IP address.

15
00:01:13,770 --> 00:01:22,460
In this topology of shut down all the interfaces on the switch and what I'll do now is enable them so

16
00:01:22,460 --> 00:01:29,470
that all right interfaces come up at the same time and an election is held.

17
00:01:29,560 --> 00:01:33,210
So here's Rada for sure.

18
00:01:33,220 --> 00:01:43,370
IP SPF interface gigabit Foster Ethan 00 we can see that this Rada has a party of 0.

19
00:01:43,390 --> 00:01:51,350
Its state is your other neighbor relationships are being established so show IP of SPF neighbor we have

20
00:01:51,350 --> 00:01:54,770
a serial interface which we can ignore for this discussion.

21
00:01:54,770 --> 00:01:56,230
That's this interface here.

22
00:01:56,510 --> 00:02:05,140
We are concentrating on the Ethernet segment so we can see the properties of the neighbors right if

23
00:02:05,150 --> 00:02:07,370
one has a property of 100.

24
00:02:07,430 --> 00:02:13,250
It's become the designated router it to has a party of one.

25
00:02:13,350 --> 00:02:17,610
It's become a deal or other route a 3 has a party of 20.

26
00:02:18,000 --> 00:02:28,180
It's become the BTR and once again on the local Rada Foster Ethan at 0 0.

27
00:02:28,290 --> 00:02:35,610
It's become a D or other so the first criteria for determining who the designated Rada is on a segment

28
00:02:35,970 --> 00:02:40,150
is priority highest priority wins default.

29
00:02:40,160 --> 00:02:44,260
Property is one when the property is set to zero.

30
00:02:44,310 --> 00:02:51,580
The Rada will not become a designated Rada or a backup designated Rada hope you enjoyed this video.

31
00:02:51,580 --> 00:02:55,530
If he did please like it and please subscribe to my YouTube channel.

32
00:02:55,600 --> 00:02:57,280
I wish you all the very best.