8.10. CONCLUSION
In this chapter we have explored some of the advanced topics that arise in the context of L3VPN: the use of route reflectors, VPN scaling numbers, security issues, QoS and IPv6. However, the discussion so far has been restricted to setups where the VPN spanned a single AS and where the VPN customers were enterprises (implying that each customer has only a small number of routes). In the next chapter we will look at more advanced setups, where VPN customers may themselves be either Internet service providers or VPN providers and where a single VPN may span across several ASs.
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