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How to Configure BFD
How to Configure BFD
BFD Configuration Guidelines
Before you configure BFD, consider the following guidelines:
• FRR/TE, FRR/IP, and FRR/LDP using BFD is supported on POS interfaces and Ethernet interfaces.
• To establish a BFD neighbor in Cisco IOS XR software, BFD must either be configured under a dynamic
• The maximum rate in packets-per-second (pps) for BFD sessions is linecard-dependent. If you have
• When using BFD with OSPF, consider the following guidelines:
Configuring BFD Under a Dynamic Routing Protocol or Using a Static Route
Enabling BFD on a BGP Neighbor
BFD can be enabled per neighbor, or per interface. This task describes how to enable BFD for BGP on a
neighbor router. To enable BFD per interface, use the steps in the
Note
BFD neighbor router configuration is supported for BGP only.
SUMMARY STEPS
1. configure
2. router bgp autonomous-system-number
3. bfd minimum-interval milliseconds
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
142
routing protocol, or using a static route.
multiple linecards supporting BFD, then the maximum rate for BFD sessions per system is the supported
linecard rate multiplied by the number of linecards.
• BFD establishes sessions from a neighbor to a designated router (DR) or backup DR (BDR) only
when the neighbor state is full.
• BFD does not establish sessions between DR-Other neighbors (for example, when their OSPF states
are both 2-way).
Caution
If you are using BFD with Unicast Reverse Path Forwarding (uRPF) on a particular
interface, then you need to use the echo disable command to disable echo mode
on that interface; otherwise, echo packets will be rejected. For more information,
see the
Disabling Echo
IPv4 interface, use the [no] ipv4 verify unicast source reachable-via command
in interface configuration mode.
Mode. To enable or disable IPv4 uRPF checking on an
Enabling BFD for OSPF on an
Implementing BFD
Interface.
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