3Com Switch 8800 Configuration Guide
Chapter 37 BGP/MPLS VPN Configuration
37-1
Chapter 37 BGP/MPLS VPN Configuration
37.1 BGP/MPLS VPN Overview
Traditional VPN, for which layer 2 tunneling protocols (L2TP, L2F and PPTP, and so on.)
or layer 3 tunnel technology (IPSec, GRE and so on.) is adopted, is a great success
and is therefore widely used. However, along with the increase of the size of VPNs , the
deficiency of traditional VPN in such aspects as expansibility and manageability
becomes more and more obvious. In addition, QoS (Quality of Service) and security
are also the difficult problem for traditional VPN.
Using the MPLS technology, service providers can implement the IP-based VPN
services easily and enable their networks to meet the expansibility and manageability
requirement for VPN. The VPN constructed by using MPLS also provides the possibility
for the implementation of value-added service. Multiple VPNs can be formed from a
single access point, and each VPN represents a different service, making the network
able to transmit services of different types in a flexible way.
Product currently provides comparatively complete BGP/MPLS VPN networking
capabilities:
z
Address isolation, allowing the overlap of address of different VPNs and public
networks.
z
Supporting MBGP advertising VPN routing information through public network,
establishing BGP/MPLS VPN.
z
Forwarding VPN data stream over MPLS LSP.
z
Providing MPLS VPN performance monitoring and fault detecting tools.
