slotted_aloha-scenario1.nt.log

网络仿真软件OPNET ALOHA协议模型的文件

[Environment]
duration=3600.000000
seed=128
net_name=slotted_aloha-scenario1
sim_log_delim=TAB

[Run Info]
run_date=13:07:45 Fri Sep 22 2000

[Log Entries]
0	182	Logical network.BaseStation (100 meters)	Results	RIP	Performance	SYMPTOM(S): <NL>  1. No RIP routing updates past a certain <NL>  simulation time. <NL>  2. Lower than expected throughput or <NL>  utilization of the links. <NL>  <NL> CAUSE(S): <NL>  "RIP Sim Efficiency" simulation attribute <NL>  is set to "Enabled". <NL>  <NL> SUGGESTIONS: <NL>  Set "RIP Sim Efficiency" simulation <NL>  attribute to "Disabled". <NL> 
5.00029897073	293	Logical network.Server	Protocol	UDP	Packet Drop	SYMPTOM(S): <NL>  Discarding UDP datagram received (destined <NL>  for port number: 520) <NL>  <NL>  It is typical for end nodes (e.g., wkstn <NL>  and servers) to discard datagrams containing <NL>  RIP messages (i.e., port 520). In that case, <NL>  this message can be igonored. <NL>  <NL> EFFECT(S): <NL>  1. The datagram is discarded by the UDP. <NL>  2. Application data may not be received. <NL>  3. No Effects if the datagram was received <NL>     for port 520 and node is not using RIP. <NL>  <NL> SUGGESTIONS: <NL>  Make sure that the applications are <NL>  sending packets to a port that UDP <NL>  is listening on. <NL>  <NL>  This message will not be repeated. <NL> 
2960.5	78184	Logical network.Remote4	Protocol	TCP	Data_Transmission	SYMTPOM(S): <NL>  TCP is retransmitting data segments <NL>  which will cause additional overhead <NL>  on the lower layers and links <NL>  <NL> CAUSE(S): <NL>  This may be normal behavior on a  <NL>  network which has either: <NL>  1) Slow links <NL>  2) Possibly dropped packets (ATM or FR) <NL>  3) Queuing delays <NL>  <NL> SUGGESTIONS: <NL>  If any of the above listed causes are <NL>  expected, no action is required, as <NL>  this is normal protocol behavior for <NL>  TCP <NL>  <NL>  Otherwise look for problems in the <NL>  lower layers, such as IP dropped  <NL>  packets or other errors in the  <NL>  simulation log <NL>  <NL>  View TCP response time statistics <NL>  for data regarding the delays <NL>  <NL> This message will not be repeated <NL> 
3600	95421	N/A	Config.	Event Manager	Performance	Try setting the 'event_speed_parameter' to (239550). <NL> This is a preference under the category called 'all'. <NL>  <NL> The advanced event management system in the Simulation <NL> Kernel can be tuned to maintain peak performance when <NL> simulating very large systems. Your trade-off is that <NL> higher values of event_speed_parameter require <NL> additional memory. <NL>  <NL> Optimal values depend on the type and size of models, <NL> so the value above is an estimate based on how this <NL> simulation performed. You may wish to experiment <NL> with different values and compare the simulation's <NL> performance. In general, increasing this parameter <NL> will not yield significant performance gains for small, <NL> lightly-loaded systems. <NL> 

[Summary]
Config.	RIP	Attribute Settings	0
Config.	RIP	Neighbor Modules	0
Config.	UDP	Neighbor Modules	0
Config.	RIP	Routing Table Configuration	0
Config.	TCP	Setup	0
Config.	Transport_Interface	Setup	0
Config.	OSPF	Model_Configuration_Error	0
Config.	OSPF	Model_Configuration_Warning	0
Config.	BGP	Model_Configuration_Error	0
Config.	BGP	Model_Configuration_Warning	0
Config.	IP	Model_Configuration_Error	0
Config.	IP	Model_Configuration_Warning	0
Config.	Ethernet	Model Configuration	0
Config.	Application	Setup	0
Config.	IGMP Host	Model_Configuration_Warning	0
Config.	Event Manager	Performance	1
Protocol	RIP	Timeouts	0
Protocol	UDP	Packet Drop	1
Protocol	IP	Higher Layer Protocol Register	0
Protocol	TCP	Data_Transmission	1
Protocol	Transport_Interface	Data_Transmission	0
Protocol	OSPF	Protocol_Error	0
Protocol	OSPF	Protocol_Warning	0
Protocol	BGP	Protocol_Error	0
Protocol	BGP	Protocol_Warning	0
Protocol	IP	Protocol_Error	0
Protocol	IP	Protocol_Warning	0
Protocol	IP	Packet Drop	0
Protocol	IP	Wireless2Intf_Auto_Assignment_Warning	0
Protocol	IP	Static_Auto_Assignment_Warning	0
Protocol	Ethernet	Packet Drop	0
Protocol	Application	Cli-Svr	0
Protocol	RSVP	Model Configuration Error	0
Low-Lev.	Simulation	Error	0
Low-Lev.	UDP	LLM Related	0
Low-Lev.	UDP	Create Local Port	0
Low-Lev.	RIP	Create UDP Receive Port	0
Low-Lev.	TCP	Kernel_Error	0
Low-Lev.	OSPF	KP_Invocation_Error	0
Low-Lev.	IP	Address_Mapping_via_NATO	0
Low-Lev.	IP	KP_Invocation_Error	0
Low-Lev.	IGMP Host	Model_Internals_Error	0
Results	RIP	Performance	1
Results	Transport_Interface	No_Results	0
Results	OSPF	Unexpected_Results	0
Results	BGP	Unexpected_Results	0
Results	IP	Unexpected_Results	0
Results	Ethernet	Performance	0
Results	Ethernet	No Results	0
Results	Application	No Results	0
Results	Application	Invalid Results	0
Results	Application	Traffic Generation	0
Results	ICMP	Performance	0