Chapter 5. Forwarding Traffic Down Tunnels

Chapter 3, “Information Distribution,” covered information distribution through OSPF and IS-IS. Chapter 4, “Path Calculation and Setup” covered path calculation (CSPF) and path setup (RSVP).

If you have done everything in Chapters 3 and 4 successfully, at this point, any tunnel interface you have created comes up. But after a tunnel is up, what do you do with it?

You can use three methods to forward traffic down a tunnel interface:

This chapter covers these three methods, as well as information about load sharing across MPLS TE tunnels. Included is one of MPLS TE's more attractive properties—the capability to do fine-grained unequal-cost load sharing of traffic.

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