DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Enters interface configuration mode for the specified bundle
ID.
interface Bundle-Ether bundle-id
Example:
Step 2
RP/0/RP0/CPU0:router(config)# interface
Bundle-Ether 1
bfd address-family ipv4 minimum-interval milliseconds
Step 3
Example:
RP/0/RP0/CPU0:router(config-if)#bfd address-family
ipv4 minimum-interval 2000
Specifies the minimum interval, in milliseconds,
for asynchronous mode control packets on IPv4
BFD sessions on bundle member links. The
range is from 15 to 30000.
Note
Specifies a number that is used as a multiplier with the
minimum interval to determine BFD control and echo packet
bfd address-family ipv4 multiplier multiplier
Example:
Step 4
failure detection times and transmission intervals for IPv4
RP/0/RP0/CPU0:router(config-if)#bfd address-family
ipv4 multiplier 30
BFD sessions on bundle member links. The range is from
2 to 50. The default is 3.
Although the command allows you to configure
a minimum of 2, the supported minimum is 3.
Note
commit
Step 5
BFD Transparency
Bidirectional Forwarding Detection(BFD) protocol is a simple hello mechanism that detects failures in a
network in less than one second, depending on the timer value configured.
Both endpoints of a BFD Session periodically send Hello packets to each other. If a number of those packets
are not received, the session is considered down. BFD provides fast BFD peer failure detection times
independently of all media types, encapsulations, topologies, and routing protocols BGP, IS-IS, and OSPF.
BFD Transparency feature enables you to configure BFD Sessions between customer edge devices connected
over an L2VPN network. These BFD sessions are transparent to the core. For example, BFD packets being
exchanged between CEs are neither dropped on any router in the core, nor punted on any core device.
In this section, you will learn how to configure BFD Transparency in Ethernet VPN (EVPN) Virtual Private
Wire Service (VPWS).
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
217
Implementing BFD
BFD Transparency
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