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Optical Network Control: Architecture, Protocols, and Standards by Debanjan Saha, Bala Rajagopalan, Greg Bernstein

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10.9. Issues

One of the consequences of defining different OSPF TE extensions is that the frequency and the volume of routing updates may increase significantly as compared with regular OSPF. With traffic engineering extensions, link state advertisements capture resource availability. This information must be refreshed frequently enough to maintain fidelity. At the same time, they should not be generated too frequently, for instance, to reflect minor changes in resource status. A configurable thresholding scheme can be used whereby a node would generate an LSA update only if the resource information changes “significantly.” This modification reduces the number of TE LSA updates.

In the absence of any change in the network state, the TE LSAs are ...

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