IBM 6 MPLS manual The CR-LDP simulation attribute must be set to CSPF

Specialized Models User Guide 6 MPLS Model User Guide

Constrained OSPF (CSPF) is used to implement constraint-based routing of LSPs. You can configure dynamic LSPs to use constraint-based routing in the LSP’s TE Parameters attribute by setting the Bandwidth, Delay, and Hop Count constraints. When using TE constraints, the model must be configured to use (CSPF) as follows:

•The CR-LDP simulation attribute must be set to CSPF

•The IP routing protocol must be set to OSPF (You can set the dynamic routing protocol to OSPF using the IP Dynamic Routing Protocol simulation attribute.)

With static LSPs, you can specify the exact route used by the LSP. Static LSPs allow more routing control, but offer less resiliency to node and link failures. For this reason, you should always specify at least one backup route when configuring static LSPs in your network.

Procedure 6-3 Creating Static LSPs

1Click on the MPLS_E-LSP_STATIC object in the MPLS object palette.

2In the project workspace, click on the LSP’s ingress LER.

3Click on the next link or router in the LSPs route.

➥The tooltips indicate which links and routers can be added to the route. Hold the cursor over a link or router for details about adding it to the LSP.

4Continue clicking on each link or router in the route until all have been added.

5Right-click in the project workspace and select Finish Path Definition to finish drawing the LSP.

6If you are finished creating static LSPs, right-click in the project workspace and select Abort Path Definition. Otherwise, draw the next static LSP.

7From the Protocols > MPLS menu, choose Update LSP Details to configure label switching information on the LSP(s).

End of Procedure 6-3

Modeler/Release 10.0 SPM-6-15