Contents
32
Software Configuration Guide—Release IOS XE 3.9.xE and IOS 15.2(5)Ex
Identifying a Port with DHCP Option 82 39-4
ANCP Guidelines and Restrictions 39-5
Configuring Bidirection Forwarding Detection 40-1
Finding Feature Information 40-1
Contents 40-2
Prerequisites for Bidirectional Forwarding Detection 40-2
Restrictions for Bidirectional Forwarding Detection 40-2
Information About Bidirectional Forwarding Detection 40-3
BFD Operation 40-3
Neighbor Relationships 40-3
BFD Detection of Failures 40-4
BFD Version Interoperability 40-5
BFD Session Limits 40-5
BFD Support for Nonbroadcast Media Interfaces 40-5
BFD Support for Nonstop Forwarding with Stateful Switchover 40-5
BFD Support for Stateful Switchover 40-6
BFD Support for Static Routing 40-6
Benefits of Using BFD for Failure Detection 40-7
Hardware Support for BFD 40-7
How to Configure Bidirectional Forwarding Detection 40-8
Configuring BFD Session Parameters on the Interface 40-8
Configuring BFD Support for Dynamic Routing Protocols 40-9
Configuring BFD Support for BGP 40-9
Configuring BFD Support for EIGRP 40-10
Configuring BFD Support for OSPF 40-11
Configuring BFD Support for Static Routing 40-13
Configuring BFD Echo Mode 40-15
Prerequisites 40-15
Restrictions 40-15
Configuring the BFD Slow Timer 40-16
Disabling BFD Echo Mode Without Asymmetry 40-16
Monitoring and Troubleshooting BFD 40-17
Configuration Examples for Bidirectional Forwarding Detection 40-17
Example: Configuring BFD in an EIGRP Network with Echo Mode Enabled by Default 40-17
Example: Configuring BFD in an OSPF Network 40-22
Example: Configuring BFD Hardware-Offload support in a BGP Network Network 40-25
Example: Configuring BFD Support for Static Routing 40-27
Additional References 40-28
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