Case Description:
2004-2-27
Use: Organization Routing Table
Participant: router
Type: Main, basic
Description: After the use of the system network simulation layer is built or changed, the router executes the routing table
Methods Complete the (re -) organization of the routing table.
Use: in line
Participant: packet
Type: Secondary
Description: The current starts at the time of the IP packet to reach the router link interface card in the network transmission. IP packet
Will enter the packet queue by queuing the packet.
Case: Receive packets
Participants: routers, router ports
Type: Secondary
Description: The current time starting with the router from the data packet queue to transfer IP packets to the IP packet
The data form of the router can be handled.
Case: Routing calculation
Participant: router
Type: Main, basic
Description: After the use of the router starts with the router, it will execute the routing algorithm for routing
Calculate, determine which link interface from the IP packet.
Use: Forwarding the packet
Participants: routers, router ports
Type: Secondary
Description: After the use of the router starts with the router, the IP packet will be sent in the appropriate link interface.
send out.
Case: Send a response message
Participants: routers, router ports
Type: Secondary
Description: After the use of the router starts with the router to complete the IP packet, the answer message will be acted in the appropriate link interface.
Send it out.
Condition: Receive Answering Message
Participants: routers, router ports
Type: Secondary
Description: The moment that starts with the router from the router from the packet queue to the answer message, which IP will be judged
The packet is sent successfully.
Use: Processing Failure
Participant: router
Type: Optional
Description: After the use of the router starts with the router, after the network fault (or congestion), perform a fault processing scheme
Treatment.
Use: obtain network information
Participant: Network Builder
Type: Basic
Description: Use the time that starts with the system's initial start, the network generator will read the file or the relevant interface to get the network.
Topological information and physical information.
Use: Generate Topology
Participant: Network Builder
Type: Basic
Description: After the use of the network information, the network generator will generate a topology according to the network topology information.
Structure.
Use: Generate physical structure
Participant: Network Builder
Type: Basic
Description: After the use of the system starts with the system generation topology, the network generator will generate physical information according to the network physical information.
structure.
Routing simulation system concept diagram
2004-2-27
