Users Guide

BFD commands
bfd
Enables BFD sessions with specified neighbors.
Syntax
bfd
Parameters None
Default Not configured
Command Mode
ROUTER-NEIGHBOR
ROUTER-TEMPLATE
Usage Information
• Use the bfd command to configure BFD sessions with a specified neighbor or neighbors which inherit a BGP
template. Use the neighbor {ip-address | ipv6-address} command in ROUTER-BGP mode to
specify the neighbor. Use the template template-name command in ROUTER-BGP mode to specify a
BGP template. Use the no bfd command in ROUTER-NEIGHBOR mode to disable BFD sessions with a
neighbor.
• Use the bfd all-neighbors command to configure L3 protocol-specific BFD parameters for all BFD
sessions between discovered neighbors. The BFD parameters you configure override the global session
parameters configured with the
bfd interval command.
Example
OS10(conf)# router bgp 1
OS10(config-router-bgp-1)# neighbor 10.1.1.1
OS10(config-router-neighbor)# bfd
OS10(config-router-neighbor)# no shutdown
OS10(config)# router bgp 300
OS10(config-router-bgp-300)# template ebgppg
OS10(config-router-template)# bfd
OS10(config-router-template)# exit
OS10(config-router-bgp-300)# neighbor 3.1.1.1
OS10(config-router-neighbor)# inherit template ebgppg
OS10(config-router-neighbor)# no shutdown
Supported
releases
10.4.1.0 or later
bfd all-neighbors
Configures all BFD session parameters established between neighbors discovered by an L3 protocol.
Syntax
bfd all-neighbors [milliseconds min_rx milliseconds multiplier number role
{active | passive}]
Parameters
• interval milliseconds — Enter the time interval for sending control packets to BFD peers, from 100
to 1000. Dell EMC recommends using more than 100 milliseconds.
• min_rx milliseconds — Enter the maximum waiting time for receiving control packets from BFD peers,
from 100 to 1000. Dell EMC recommends using more than 100 milliseconds.
• multiplier number — Enter the maximum number of consecutive packets that must not be received
from a BFD peer before the session state changes to Down, from 3 to 50.
• role {active | passive} — Enter active if the router initiates BFD sessions. Both BFD peers can
be active at the same time. Enter passive if the router does not initiate BFD sessions, and only responds to
a request from an active BFD to initialize a session.
Default
The time interval for sending control packets to BFD peers is 200 milliseconds.
The maximum waiting time for receiving control packets from BFD peers is 200 milliseconds.
The number of consecutive packets that must be received from a BFD peer is 3.
The BFD role is active
506 Layer 3