Summary
This chapter covered many advanced IPSec features, some of which are specific to Cisco IOS, which help IPSec VPNs scale better and be more fault tolerant. You also explored how to use GRE in combination with IPSec to work around implicit limitations of native IPSec. Finally, you looked at how to solve IPSec issues with NAT. The concepts covered in this chapter lay the foundation for future chapters on IPSec scalability and fault tolerance. Subsequent chapters include case studies to help you understand the features within the context of design and deployment scenarios. |
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