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Command Modes
ROUTER OSPF
ROUTER OSPFv3
ROUTER BGP
ROUTER ISIS
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.13(0.0) Introduced support for enabling BFD on non-default VRFs for IPv4 BGP, default,
and non-default VRFs for IPv6 BGP on the S3100 series, S3048–ON, S4048–ON,
S4048T-ON, S5000, S6000, S6000–ON, S6010–ON, S6100–ON, C9010, Z9500,
and Z9100–ON.
9.11(2.1P1)
Introduced support for enabling BFD on non-default VRFs for OSPFv2 on all the
remaining Dell EMC Networking OS platforms.
Introduced support for enabling BFD on non-default VRFs for OSPFv3 on all the
Dell EMC Networking OS platforms.
9.10(0.2) Introduced support for enabling BFD on non-default VRFs for OSPFv2 on the
S3048–ON, S4048–ON, S4048T-ON, S6010–ON, Z9100–ON, and S6100–ON.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100-ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.0.2.0 Introduced on the S6000.
9.2(1.0) Introduced on the Z9500.
9.2.(0.0) Introduced BFD for VRRP and OSPFv3 on Z9000, S4810, and S4820T.
9.0.0.0 Introduced BFD for BGP on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.8.0 Introduced BFD for BGP on the S4810.
8.4.1.3 Introduced BFD for BGP on the E-Series.
8.2.1.0 Introduced BFD for OSPF and ISIS on the E-Series.
7.6.1.0 Introduced BFD for OSPF on the C-Series.
7.5.1.0 Introduced BFD for ISIS on the E-Series.
7.4.1.0 Introduced BFD for OSPF on the E-Series.
Usage
Information
All neighbors inherit the timer values configured with the bfd neighbor command except in the
following cases:
● Timer values configured with the isis bfd all-neighbors or ip ospf bfd all-
neighbors commands in INTERFACE mode override timer values configured with the bfd
neighbor command. Likewise, using the no bfd neighbor command does not disable BFD on
an interface if you explicitly enable BFD using the isis bfd all-neighbors command.
● Neighbors that have been explicitly enabled or disabled for a BFD session with the bfd neighbor or
neighbor bfd disable commands in ROUTER BGP mode do not inherit the global BFD enable/
250 Bidirectional Forwarding Detection (BFD)