The simplified block diagram below shows the basic software architecture of the DC-OSPF stack.
For an overview of the DC-OSPF software and its features, see DC-OSPF Product Overview.
Components
In the above architecture diagram, the components shown within the shaded boxes form the core portable DC-OSPF source code components.
OSPF Protocol Manager
The OSPF Protocol Manager component supports the core OSPF protocol function.
- Management of interfaces and Hello protocol
- Management of neighbors and database synchronization
- Maintenance of link state database
- Calculation of best OSPF routes using Dijkstra
- Distribution of next hop routes to Routing Table Manager and traffic engineering link state information to CSPF calculator
- Support for separation of data bearing and control links for optical networks
- Multiple instances of OSPF supports Virtual Routers
Routing Table Manager
The Routing Table Manager selects a single active route for each destination and uses this information to program the Forwarding Tables. DC-OSPF can work with DC-RTM or a third party routing table manager.
CSPF Calculator
The CSPF Calculator deals with Quality of Service queries (finding the best route to a destination that meets specified constraints, such as a specified minimum bandwidth). DC-CSPF provides a flexible CSPF calculator designed for use with DC-ISIS and DC-OSPF.
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