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

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7.5. GMPLS Extensions to RSVP-TE

At a first glance, the GMPLS extensions to RSVP-TE consist of a few new objects, a new message, and associated procedures. If we look deeper, it becomes apparent that GMPLS brings significant changes to the usage of RSVP-TE. These are:

  • Enforcement of the separation between the data plane and the control plane. In particular, the RSVP model where the control messaging is tied to specific data plane interfaces (see section 7.4.1.3) is eliminated.

  • The dilution of the soft state model. As described in sections 7.4.1.4 and 7.4.2.3, failures or miscommunication in the control plane lead to data plane actions under RSVP and RSVP-TE. GMPLS extensions aim to ensure that control plane failure events do not affect the fate ...

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