Metro Ethernet

Chapter 6. RSVP for Traffic Engineering and Fast Reroute

This chapter covers the following topics:

• Understanding RSVP-TE

• Understanding MPLS Fast Reroute

Traffic engineering allows the service provider to manipulate the traffic trajectory to map traffic demand to network resources. You have seen in Chapter 5, “MPLS Traffic Engineering,” that traffic engineering can be achieved by manipulating Interior Gateway Protocol (IGP) metrics or, better yet, by using a signaling protocol such as RSVP-TE. RSVP-TE offers the ability to move trunks away from the path selected by the ISP's IGP and onto a different path. This allows a network operator to route traffic around known points of congestion in the network, thereby making more efficient use of the available ...