Chapter 9.  MPLS Design and Migration

This chapter covers the following topics:

  • MPLS VPN Design and Topologies—. The various design approaches to practical MPLS VPN deployment are described in this section. MPLS VPNs can be implemented in a variety of ways, using a combination of packet-based and ATM MPLS Label-Switched Routers (LSRs).

  • Migrating MPLS into an ATM network—. This section describes how MPLS can be deployed into a traditional ATM network gradually, starting with just a single pair of ATM LSRs in an otherwise purely ATM network. MPLS can be deployed across non-MPLS-capable switches using VP connections over traditional ATM switches. Core ATM switches may be phased out or converted to ATM LSRs, leading to full deployment of ATM MPLS.

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