Limitations 204
BGP Flowspec Conceptual Architecture 204
Information About Implementing BGP Flowspec 205
Flow Specifications 206
Supported Matching Criteria and Actions 206
Traffic Filtering Actions 209
BGP Flowspec Client-Server (Controller) Model and Configuration 211
How to Configure BGP Flowspec 212
Enable Flowspec on BGP Side 213
Define Class 214
Define Policy Map 215
Link Flowspec to PBR Policies 217
Verify BGP Flowspec 219
Preserving Redirect Nexthop 221
Validate BGP Flowspec 222
Disabling BGP Flowspec 223
Disable Flowspec Redirect and Validation 223
Configuration Examples for Implementing BGP Flowspec 225
Flowspec Rule Configuration 225
Drop Packet Length 226
Remark DSCP 226
Additional References for BGP Flowspec 227
CHAPTER 4
Implementing BFD 229
Prerequisites for Implementing BFD 231
Restrictions for Implementing BFD 232
Information About BFD 233
Differences in BFD in Cisco IOS XR Software and Cisco IOS Software 233
BFD Multipath Sessions Support on nV Edge System 234
BFD Modes of Operation 234
BFD Packet Information 235
BFD Source and Destination Ports 235
BFD Packet Intervals and Failure Detection 235
BFD Packet Intervals on Physical Interfaces 235
BFD Packet Intervals on Bundle Member Links 236
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
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