Bfd Transparency - Cisco NCS 5500 Series Configuration Manuals

Implementing BFD
DETAILED STEPS
Command or Action
Step 1 configure
Step 2 interface Bundle-Ether bundle-id
Example:
RP/0/RP0/CPU0:router(config)# interface
Bundle-Ether 1
Step 3 bfd address-family ipv4 minimum-interval milliseconds
Example:
RP/0/RP0/CPU0:router(config-if)#bfd address-family
ipv4 minimum-interval 2000
Note 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.
Step 4 bfd address-family ipv4 multiplier multiplier
Example:
RP/0/RP0/CPU0:router(config-if)#bfd address-family
ipv4 multiplier 30
Step 5
commit

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).
Purpose
Enters interface configuration mode for the specified bundle
ID.
Specifies a number that is used as a multiplier with the
minimum interval to determine BFD control and echo packet
failure detection times and transmission intervals for IPv4
BFD sessions on bundle member links. The range is from
2 to 50. The default is 3.
Note
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
Although the command allows you to configure
a minimum of 2, the supported minimum is 3.
BFD Transparency
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