Cisco ASR 9000 Series Configuration Guide

CHAPTER 3
Implementing BFD
This module describes the configuration of bidirectional forwarding detection (BFD) on the Cisco ASR 9000
Series Router.
Bidirectional forwarding detection (BFD) provides low-overhead, short-duration detection of failures in the
path between adjacent forwarding engines. BFD allows a single mechanism to be used for failure detection
over any media and at any protocol layer, with a wide range of detection times and overhead. The fast
detection of failures provides immediate reaction to failure in the event of a failed link or neighbor.
Feature History for Implementing Bidirectional Forwarding Detection
ModificationRelease
BFD was introduced.Release 3.7.2
•
Support for these applications with BFD was added:
◦
Hot Standby Router Protocol (HSRP)
◦
Virtual Router Redundancy Protocol (VRRP)
•
The dampening command was added to minimize BFD session flapping
and delay session startup.
•
The echo ipv4 source command was added to specify a source IP address
and override the default.
•
The ipv6 checksum command was added to enable and disable the IPv6
UDP checksum computation and BFD interface configuration modes.
Release 3.9.0
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
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Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model