Users Guide

Usage
Information
When you explicitly disable a BGP neighbor for a BFD session with the neighbor bfd disable
command:
● The neighbor does not inherit the global BFD disable values configured with the bfd neighbor
command or configured for the peer group to which the neighbor belongs.
● The neighbor only inherits the global timer values configured with the bfd neighbor command:
interval, min_rx, and multiplier.
When you remove the Disabled state of a BFD for a BGP session with a specified neighbor by entering the
no neighbor bfd disable command, the BGP link with the neighbor returns to normal operation
and uses the BFD session parameters globally configured with the bfd neighbor command or
configured for the peer group to which the neighbor belongs.
Related
Commands
● neighbor bfd — enable a BFD session explicitly with a BGP neighbor or a BGP peer group.
show bfd neighbors
Display BFD neighbor information on all interfaces or a specified interface.
Syntax
show bfd neighbors interface [detail]
Parameters
interface Enter one of the following keywords and slot/port or number information:
● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port/subport information.
● For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the
slot/port information.
● For a port channel interface, enter the keywords port-channel then a
number.
● For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
detail (OPTIONAL) Enter the keyword detail to view detailed information about BFD
neighbors.
Defaults None
Command Modes
● EXEC
● EXEC Privilege
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.2(1.0) Introduced on the Z9500.
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.8.0 Added support for BFD for BGP on the S4810.
8.4.1.3 Added support for BFD for BGP on the E-Series.
8.2.1.0 Introduced on the E-Series.
7.6.1.0 Introduced on the C-Series.
7.5.1.0 Added support for BFD for VLAN and port-channel interfaces on the E-Series.
7.4.1.0 Introduced BFD on physical ports on the E-Series.
Bidirectional Forwarding Detection (BFD) 267