
114 Chapter 4: Secure MPLS VPN Designs
Finally, high availability requires a number of different technologies in parallel: quality-of-
Service, fast rerouting and convergence, device and line redundancy, management, and
finally security. Therefore, a complete architecture must take many more considerations
into account to achieve a highly available solution.
Following these recommendations, a standard RFC 2547 network can be secured and VPNs
be made highly available, even with Internet provided on the same core. The next challenge
for the service provider is how to interconnect securely to another service provider network,
using one of the Inter-AS ...