120Chapter 6: Metro Mobility: Client-Based Mobile IP
asymmetric routing problems because of firewalls and ingress filtering that can be addressed
with reverse tunneling. Network Address Translation (NAT) traversal, as seen in the public hot
spot at the coffee shop, also presents a problem and requires a new type of tunneling. Virtual
private network (VPN) integration and public and private roaming is also explored. Finally, the
chapter discusses the Registration Revocation mechanism that efficiently manages mobility
bindings.
Figure 6-1High-Level Metro Roaming Topology
Reverse Tunneling
As you saw in Chapter 2, “Understanding Mobile IP,” Mobile IP ...
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