CHAPTER 10
Flow-Based Redirect
The traffic from an IP session is redirected based on the destination address (for a simple IP session), and
to a tunnel (for a mobile IP session). However, in some application scenarios, some of the traffic is routed
to a specific system or a specific interface for additional service or processing. Through the Adult Content
Filtering (ACF) capability, web traffic of some sessions can be routed to an ACF appliance that filters the
traffic based on the URL or content. The Flow-Based Redirect (FBR) feature enables applications such as
the ACF to route matching traffic to a specified next hop device.
The FBR feature is Virtual Routing and Forwarding (VRF)-aware. You can map an interface to a VRF or
transfer a VRF as long as the session and the interface connecting the next hop device are within the same
VRF network.
•
Finding Feature Information, page 79
•
Flow-Based Redirect for Adult Content Filtering, page 80
•
Flow-Based Redirect for Selective IP Traffic Offload, page 81
•
Activating and Deactivating the Flow-Based Redirect Feature Through Vendor-Specific Attributes,
page 82
•
Configuring Flow-Based Redirect for a Traffic Class Service, page 82
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Examples, page 85
•
Best Practices for Configuring the NAT on the Cisco ASR 1000 Series Routers, page 87
•
NAT Overloading and Port Parity, page 88
•
NAT Interface Overloading with VRF, page 88
•
Additional References, page 89
•
Feature Information for Flow-Based Redirect, page 89
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this module.
Intelligent Wireless Access Gateway Configuration Guide
OL-30226-03 79
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