Network Simulation with OPNET

Transcription

1 CS 521 PROJECT 2 Network Simulation with OPNET Submitted by: Manish Mehta (manishmehta@india.com) Date: 04/16/2001

2 Scenario 1: Two file transfer TCP connections using the same link with two routers in between. The diagram below shows the system setup for this scenario: For this scenario, we have considered three different cases: Case 1: WORKSTATIONS: 1. Full : client1 client1 ethernet_wkstn T C P P A R A M E T E R S: Maximum Segment Size Ethernet Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Disabled Fast Recovery Disabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 1.0 Minimum RTO 0.5

3 Maximum RTO 64 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout Full : client2 client2 ethernet_wkstn T C P P A R A M E T E R S: Maximum Segment Size Ethernet Receive Buffer 8760 Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Disabled Fast Recovery Disabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 1.0 Minimum RTO 0.5 Maximum RTO 64 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 SERVER: Full : FTP_Server FTP_Server ethernet_server T C P P A R A M E T E R S: Maximum Segment Size Ethernet Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Enabled Fast Recovery Enabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Time based Initial RTO 1.0 Minimum RTO 0.5

4 Maximum RTO 7.0 RTT Gain 0.1 Deviation Gain 0.1 RTT Deviation Coefficient 2.0 Timer Granularity 0.2 Persistence Timeout 1.0 S U P P O R T E D S E R V I C E S: FTP Description Supported APPLICATION CONFIGURATION: Full : node_2 node_2 application config A P P L I C A T I O N D E F I N I T I O N S: Command Mix 100% Inter-Request Time Constant (3600) File Size Constant ( ) Symbolic Server FTP Server Type of Service Best Effort (0) PROFILE CONFIGURATION: Full : node_3 node_3 profile config P R O F I L E C O N F I G U R A T I O N: Profile f1 Start Time Constant (10) Duration End of simulation Repeatability Once at start time P R O F I L E C O N F I G U R A T I O N.application FTP Start Time Offset Constant (10) Duration End of profile Repeatability Once at start time

5 CISCO 7000 ROUTER: Full : node_1 node_1 and node_4 CS_7000_6s_a_e6_fe2_fr4_sl4_tr4 IP Routing Speed 5000 PPP DS0: Full : node_4 <-> node_0 Transmitter A Receiver A Transmitter B Receiver B node_4 <-> node_0 PPP_DS0 node_4.pt_17_0 node_4.pr_17_0 node_0.output_1 node_0.input_1 Note: A similar link has been used between node_1 and node_0 ETHERNET 10BASET: Full : node_4 <-> FTP_Server Transmitter A Receiver A Transmitter B Receiver B node_4 <-> FTP_Server 10BaseT node_4.eth_port_tx_3_0 node_4.eth_port_rx_3_0 FTP_Server.hub_tx_0_0 FTP_Server.hub_rx_0_0 Note: A similar link has been used between client1/2 and node_1 Packet discarder Settings: All packets from time 200 sec 210 sec, 1100 sec 1110 sec, 2000 sec 2010 sec, 2200 sec 2210 sec are dropped by the packet discarder.

6 Case 1: Using the parameters shown above Fig. 1 The congestion window for the connection between the FTP Server and Client 1 Fig. 2 The congestion window for the connection between the FTP Server and Client 2

7 Fig. 3 The traffic received by client 1 Fig. 4 The traffic received by client 2

8 Case 2: Parameters changed Client 1 receive buffer : 4096 bytes Client 2 receive buffer : 4096 bytes Fig. 5 The congestion window for the connection between the FTP Server and Client 1 Fig. 6 The congestion window for the connection between the FTP Server and Client 2

9 Fig. 7 The traffic received by client 2 Fig. 8 The traffic received by client 1

10 Case 3: Parameters changed. Client 1 receive buffer : bytes Client 2 receive buffer : 200 bytes Fig. 9 The congestion window for the connection between the FTP Server and Client 1 Fig. 10 The congestion window for the connection between the FTP Server and Client 2

11 Fig. 11 The traffic received by client 1 Fig. 12 The traffic received by client 2

12 Scenario 2: Two file transfer TCP connections using the same link with four routers in between. The diagram below shows the system setup for this scenario: For this scenario, we have considered three different cases: WORKSTATIONS: 1. Full : node_5 node_5 ethernet_wkstn T C P P A R A M E T E R S: Maximum Segment Size 536 Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Enabled Fast Recovery Enabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based

13 Initial RTO 0.5 Minimum RTO 0.5 Maximum RTO 4.0 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 Connection Information Do Not Print D E S T I N A T I O N P R E F E R E N C E S ss2 Selection Weight 10 S U P P O R T E D P R O F I L E S Profile FTP 2. Full : node_4 node_4 ethernet_wkstn Client Address Auto Assigned T C P P A R A M E T E R S: Maximum Segment Size 536 Receive Buffer 8760 Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Enabled Fast Recovery Enabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 0.5 Minimum RTO 0.5 Maximum RTO 4.0 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 Connection Information Do Not Print D E S T I N A T I O N P R E F E R E N C E S ss1 Selection Weight 10 SERVERS: 1. Full : ftpserver1 Server Address ftpserver1 ethernet_server ss1

14 T C P P A R A M E T E R S: Maximum Segment Size 8192 Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Enabled Fast Recovery Enabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 0.5 Minimum RTO 0.5 Maximum RTO 7.0 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 Connection Information Do Not Print S U P P O R T E D S E R V I C E S: FTP1 Description Supported 2. Full : ftpserver2 ftpserver2 ethernet_server Server Address ss2 T C P P A R A M E T E R S: Maximum Segment Size 8192 Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Enabled Fast Recovery Enabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 0.5 Minimum RTO 0.5 Maximum RTO 7.0 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 Connection Information Do Not Print

15 S U P P O R T E D S E R V I C E S Profile FTP2 Description Supported CISCO 7000 ROUTER: Full : node_1 node_1 CS_7000_6s_a_e6_fe2_fr4_sl4_tr4 IP Routing Speed 5000 PROFILE CONFIGURATION: Full : ftp_1 ftp_1 Profile Config P R O F I L E C O N F I G U R A T I O N: Profile FTP Operation Mode Serial (Ordered) Start Time Constant (10) Duration End of simulation Repeatability Once at start time P R O F I L E C O N F I G U R A T I O N.application FTP1 Start Time Offset Constant (10) Duration End pf proffile Repeatability Once at start time APPLICATION PROFILE: Full : ftp1 ftp1 Application Config Voice Encoder Schemes All schemes A P P L I C A T I O N D E F I N I T I O N S:ftp1 Command Mix 100% Inter-Request Time Constant (20000) File Size Constant ( ) Symbolic Server FTP Server Type of Service Best Effort (0) RSVP Parameters None A P P L I C A T I O N D E F I N I T I O N S:ftp2 Command Mix 100% Inter-Request Time Constant (20000) File Size Constant ( ) Symbolic Server FTP Server Type of Service Best Effort (0) RSVP Parameters None PPP DS0: Link used between all the routers (64 kbps).

16 10BaseT: Remaining links in the setup.

17 Case 1: Using the parameters shown above Fig. 13 The congestion window diagram for the connection between node_4 and ftpserver1 Fig. 14 The congestion window diagram for the connection between node_5 and ftpserver2

18 Fig. 15 Traffic received by node_4 Fig. 16 Traffic received by node_5

19 Case 2: Parameters Changed: Receive Buffer for node_5 : 8760 bytes Receive Buffer for node_4 : bytes Fig. 17 The congestion window diagram for the connection between node_4 and ftpserver1 Fig. 18 The congestion window diagram for the connection between node_5 and ftpserver2

20 Fig. 19 Traffic received by node_4 Fig. 20 Traffic received by node_5

21 Case 3: Parameters Changed: Receive Buffer for node_5 : 200 bytes Receive Buffer for node_4 : bytes Fig. 21 The congestion window diagram for the connection between node_4 and ftpserver1 Fig. 22 The congestion window diagram for the connection between node_5 and ftpserver2

22 Fig. 23 Traffic received by node_5 Fig. 24 Traffic received by node_4

23 Scenario 3: A file transfer TCP connection and video conferencing traffic between two clients, using the same link with two routers in between. The diagram below shows the system setup for this scenario: WORKSTATIONS: 1. Full : client1 client1 ethernet_wkstn Client Address Auto Assigned T C P P A R A M E T E R S: Maximum Segment Size 536 Receive Buffer 8760 Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Disabled Fast Recovery Disabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 1.0 Minimum RTO 0.5 Maximum RTO 64

24 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 S U P P O R T E D P R O F I L E S: Profile f1 2. Full : client2 client2 ethernet_wkstn Client Address c2 T C P P A R A M E T E R S: Maximum Segment Size 536 Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Disabled Fast Recovery Disabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 1.0 Minimum RTO 0.5 Maximum RTO 64 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 D E S T I N A T I O N P R E F E R E N C E S: Symbollic Video Destination Actual c3 S U P P O R T E D P R O F I L E S: Profile stream 3. Full : client3 Client Address T C P P A R A M E T E R S: Maximum Segment Size 536 Receive Buffer Client3 ethernet_wkstn c3 Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based

25 Maximum ACK Delay Fast Retransmit Disabled Fast Recovery Disabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Attempts based Initial RTO 1.0 Minimum RTO 0.5 Maximum RTO 64 RTT Gain Deviation Gain 0.25 RTT Deviation Coefficient 4.0 Timer Granularity 0.5 Persistence Timeout 1.0 D E S T I N A T I O N P R E F E R E N C E S: Symbollic Video Destination Actual c3 S U P P O R T E D P R O F I L E S: Profile stream SERVER: Full : FTP_Server FTP_Server ethernet_server Server Address Auto Assigned T C P P A R A M E T E R S: Maximum Segment Size Ethernet Receive Buffer Receive Buffer Usage Threshold 0.0 Delayed ACK Mechanism Segment/Clock Based Maximum ACK Delay Fast Retransmit Enabled Fast Recovery Enabled Window Scaling Disabled Selective ACK (SACK) Disabled Nagle s SWS Avoidance Disabled Karn s Algorithm Enabled Retransmission Threshold Time based Initial RTO 1.0 Minimum RTO 0.5 Maximum RTO 9.0 RTT Gain 0.1 Deviation Gain 0.1 RTT Deviation Coefficient 2.0 Timer Granularity 0.2 Persistence Timeout 1.0 S U P P O R T E D S E R V I C E S: FTP Description Supported

26 CISCO 7000 ROUTER: Full : node_1 node_1 CS_7000_6s_a_e6_fe2_fr4_sl4_tr4 IP Routing Speed PROFILE CONFIGURATIONS: 1. Full : node_3 (FTP) node_3 Profile Config P R O F I L E C O N F I G U R A T I O N: Profile f1 Operation Mode Simultaneous Start Time Constant (5) Duration End of simulation Repeatability Once at start time P R O F I L E C O N F I G U R A T I O N.application FTP Start Time Offset Constant (10) Duration End pf proffile Repeatability Once at start time 2. Full : stream Stream Profile Config P R O F I L E C O N F I G U R A T I O N: Profile Stream Operation Mode Serial (Ordered) Start Time Constant (70) Duration End of simulation Repeatability Once at start time P R O F I L E C O N F I G U R A T I O N.application Stream Start Time Offset Constant (10) Duration End pf proffile Repeatability Unlimited APPLICATION PROFILE: 1. Full : node_2 (FTP) node_2 Application Config Voice Encoder Schemes All schemes A P P L I C A T I O N D E F I N I T I O N S:ftp1 Command Mix 100% Inter-Request Time Constant (3600) File Size Constant ( ) Symbolic Server FTP Server

27 Type of Service Best Effort (0) RSVP Parameters None 2. Full : streaapp (Stream) StreaApp Application Config Voice Encoder Schemes All schemes A P P L I C A T I O N D E F I N I T I O N S. Description VIDEO CONFERENCING Frame Size Information 128 * 120 pixels Symbollic Destination Video Destination Type of Service Streaming Multimedia (4) Incoming Stream Interarrival Time Constant (0.2) Outgoing Stream Interarrival Time Constant (0.2) R S V P P A R A M E T E R S RSVP Status Disabled Outbound Flow Default Inbound Flow Default

28 Fig. 25 Congestion window for Client1 Fig. 26 Traffic received by client1

29 Fig. 27 Traffic received by client2 Fig. 28 Traffic received by client3

30 Fig. 29 Traffic sent by client 3 Fig. 30 Traffic sent by client 2