Bfd Object Tracking; How To Configure Bfd; Bfd Configuration Guidelines - Cisco ASR 9000 Series Routing Configuration Manual

BFD Object Tracking

BFD Session
IPv4, IPv6
IPv4, IPv6
IPv4, IPv6
IPv4, IPv6
IPv4, IPv6
IPv4, IPv6
Restrictions
• Echo mode is not supported for hardware offloaded sessions.
• Only seven timer intervals for BFD sessions are supported.
BFD Object Tracking
Object Tracking is enhanced to support BFD to track the reachability of remote IP addresses.This will enable
complete detection and HSRP switch over to happen within a time of less than one second as BFD can perform
the detection in the order of few milliseconds

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
• The maximum number of BFD sessions supported on any one card is 1440.
• The maximum number of members in a bundle is 64.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
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Timer Interval
15 milliseconds
50 milliseconds
300 milliseconds
1 second
2 seconds
30 seconds
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.
◦ The maximum rate for BFD sessions per linecard is 9600 pps.
Sessions supported on Sessions supported on
Line Card Network Processing Unit
2000 1000
8000 3000
8000 3000
8000 3000
8000 3000
8000 3000
Implementing BFD