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Chapter 16
MPLS Service Configuration
Multiprotocol Label Switching (MPLS) is originally developed to increase forward speed of
routers. Having prominent advantages in the applications of traffic engineering and VPN,
the MPLS protocol plays an important role in
The key point of the MPLS protocol is the concept of labels, which are short,
easy-to-handle, and without topology information. Labels contain information that only
affects in a certain area.
Initially, MPLS focus on IPv4. However, the key techniques of MPLS can be expanded to
multiple protocols, such as IPv6, IPX, Apple-talk, and SNA. MPLS has no limitation on the
link layer techniques and can transport network groups over any media between network
entities.
MPLS packets are forwarded based on labels. When IP packets enter an MPLS network,
the
PE
routers on the MPLS ingress analyze the contents of the packets and select the
proper labels for the packets. The packets are forwarded by nodes in the MPLS network
according to these short labels. When the packets leave the MPLS network, the PE routers
on the MPLS egress remove the labels.
Table of Contents
MPLS Configuration .................................................................................................16-1
VPLS Configuration................................................................................................16-23
Configuring the VPWS ...........................................................................................16-47
PWE3 Configuration...............................................................................................16-54
PW Redundancy Configuration ..............................................................................16-78
16.1 MPLS Configuration
16.1.1 Configuring the Basic MPLS Function
In the basic MPLS application, the MPLS forwarding is based on the LDP sessions between
routers.
Networking Diagram
Figure 16-1
SJ-20130520164529-007|2013-06-30 (R1.0)
shows the networking diagram of the basic MPLS function.
IP
networks.
16-1
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