Cisco Systems OL-7396-01 Manual De Usuario
16-21
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 16
Configuring Tag Switching and MPLS
MPLS Overview
atm_A6-4(config-if)# ip address 189.24.14.12 255.255.0.0
atm_A6-4(config-if)# tag-switching ip
atm_A6-4(config-if)# exit
The configuration of ATM switch router A6-4, interface atm 0/0/3, follows:
atm_A6-4# configure terminal
atm_A6-4(config)# interface atm 0/0/3
atm_A6-4(config-if)# no shutdown
atm_A6-4(config-if)# ip address 189.26.14.11 255.255.0.0
atm_A6-4(config-if)# tag-switching ip
atm_A6-4(config-if)# exit
MPLS Overview
MPLS Label Distribution Protocol (LDP), as standardized by the Internet Engineering Task Force
(IETF) and as enabled by Cisco IOS software, allows the construction of highly scalable and flexible IP
Virtual Private Networks (VPNs) that support multiple levels of services. MPLS offers the following
benefits:
(IETF) and as enabled by Cisco IOS software, allows the construction of highly scalable and flexible IP
Virtual Private Networks (VPNs) that support multiple levels of services. MPLS offers the following
benefits:
•
IP over ATM scalability—Enables service providers to keep up with Internet growth
•
IP services over ATM—Brings Layer 2 benefits to Layer 3, such as traffic engineering capability
•
Standards—Supports multi-vendor solutions
•
Architectural flexibility—Offers choice of ATM or router technology, or a mix of both
This section describes the Multiprotocol Label Switching (MPLS) distribution protocol. MPLS
combines the performance and capabilities of Layer 2 (data link layer) switching with the proven
scalability of Layer 3 (network layer) routing. This chapter includes the following sections:
combines the performance and capabilities of Layer 2 (data link layer) switching with the proven
scalability of Layer 3 (network layer) routing. This chapter includes the following sections:
•
Additional MPLS Documentation
•
MPLS Overview
•
MPLS Network Packet Transmission
•
Configuring Label Edge Routing
•
Configuring VPN Networks on Fast Ethernet Interfaces
Obtaining Additional MPLS Documentation
This chapter contains early field test MPLS configuration information for label edge routing (LER) and
VPN networks on Fast Ethernet interfaces. For additional MPLS configuration documentation, refer to
the sources in
VPN networks on Fast Ethernet interfaces. For additional MPLS configuration documentation, refer to
the sources in
.