# Constraint Based Routing

![](https://3569593095-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlzYYx9HGcPr04JhNJmIC%2Fuploads%2FDMTcw5a2amPxf2AwPLP6%2Fa.png?alt=media\&token=3700ada8-5c7e-463d-8718-678a7207fb6a)

## Resource Reservation + Label Distribution

![](https://3569593095-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlzYYx9HGcPr04JhNJmIC%2Fuploads%2FQGoinSepVQ7mrdnVLVve%2Fa.png?alt=media\&token=31c07472-080b-468b-9d95-efad984bfe7d)

## Traffic Engineering (RSVP-TE)

Evolução do RSVP

Para mapear fluxos de tráfego para a topologia fisica de rede, através de caminhos com mudanças de etiquetas, requer informação acerca de recursos e constrangimentos

* Fornecidos por *Extend Link State Protocols* (IS-IS ou OSPF com extensões TE)
  * RFC 3630: Traffic Engineering (TE) Extensions to OSPF Version 2. (9/2003)
  * RFC 5305: IS-IS Extensions for Traffic Engineering. (10/2008)
