1
00:00:00,960 --> 00:00:07,240
So class based where effect queuing ensures that traffic classes get fair bandwidth guarantees.

2
00:00:07,300 --> 00:00:15,280
In other words you can guarantee a minimum bandwidth to a GDP a minimum bandwidth to FTB minimum bandwidth

3
00:00:15,340 --> 00:00:19,540
to voice traffic video traffic and so on.

4
00:00:19,540 --> 00:00:23,240
But there's no latency guarantees.

5
00:00:23,320 --> 00:00:26,140
In other words there is no priority queue.

6
00:00:26,410 --> 00:00:34,000
Class based waited for queuing is suitable only for data networks so Cisco developed low latency queuing

7
00:00:34,000 --> 00:00:39,380
or low queue which to give you the full name is pretty key.

8
00:00:39,430 --> 00:00:41,820
Class based waited for queuing.

9
00:00:41,830 --> 00:00:43,360
In other words it's class based.

10
00:00:43,360 --> 00:00:47,300
Waited for queuing with an added priority queue.

11
00:00:47,650 --> 00:00:50,440
So it takes the previous model of class based.

12
00:00:50,440 --> 00:00:57,010
Waited for queuing and adds a queue with strict poverty for real time traffic.

13
00:00:57,010 --> 00:01:06,070
So the idea is as when packets arrive based on a class or classification mechanism that you decide traffic

14
00:01:06,070 --> 00:01:08,550
is put into different classes.

15
00:01:08,700 --> 00:01:16,030
Voice traffic is put into the priority queue and is proud to rise to over other traffic types if DP

16
00:01:16,270 --> 00:01:25,020
HDP and other traffic types are put into their own classes with minimum bandwidth guarantees now to

17
00:01:25,020 --> 00:01:28,540
ensure that the priority queue doesn't starve.

18
00:01:28,560 --> 00:01:37,140
The other queues the priority queue has a minimum bandwidth guarantee but is also policed so it also

19
00:01:37,140 --> 00:01:39,740
has a maximum bandwidth limit.

20
00:01:39,930 --> 00:01:48,630
So when you specify the priority of the low latency party queue that is actually a minimum and maximum

21
00:01:50,320 --> 00:01:56,320
which provides a minimum bandwidth guarantee for voice but also ensures that voice doesn't starve the

22
00:01:56,320 --> 00:01:57,670
other traffic types.