1. Queue Management FIFO v.s. RED
佇列管理

2. Question Does RED has shorter queue length?
Does RED drop more packets?
Does RED lead to shorter E2E delay?

3. Overview Set the Queue Manager of bottleneck Interface FIFO and RED

4. Step 1 Setup topology Set bottleneck interface
6 nodes, 5 links, 4 FTP-Gens
Set bottleneck interface
Bandwidth: 100kbps
Delay: 10 ms

5. Step 2 Set the bottleneck Interfaces Set the other Interfaces
Number of IP Queues =1
IP Queue Size= B
IP Queue Type: FIFO
Set the other Interfaces

6. Step 2
RED Parameters

7. Step 3
Set 4 FTP-GENs

8. Step 4
View>Display Setting
Turn On “Queue”

9. Results
Packet drops from queue of the bottleneck interface

10. Results: Total Pkts Drop
FIFO: 121
RED: 448

11. Results: Ave Time in Queue
FIFO:
RED

12. Results: CBR Server Throughput
FIFO:
RED