Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

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bfd all-neighbors

Enable BFD sessions with all neighbors discovered by Layer 3 protocols intermediate system to intermediate system (IS-IS), open shortest path first (OSPF), OSPFv3, or border gateway protocol (BGP) on router interfaces, and (optionally) reconfigure the default timer values.

Syntax

[vrrp] bfd all-neighbors [interval interval min_rx min_rx multiplier value role {active | passive}]

Parameters

vrrp	Enter the keyword `vrrp` in INTERFACE mode to enable BFD for VRRP.
interval milliseconds	(OPTIONAL) Enter the keyword `interval` to specify non-default BFD session parameters beginning with the transmission interval. The range is from 50 to 1000. The default is 200.
min_rx milliseconds	Enter the keyword `min_rx` to specify the minimum rate at which the local system would like to receive control packets from the remote system. The range is from 50 to 1000. The default is 200.
multiplier value	Enter the keyword `multiplier` to specify the number of packets that must be missed in order to declare a session down. The range is from 3 to 50. The default is 3.
role [active \| passive]	Enter the role that the local system assumes: `Active` — The active system initiates the BFD session. Both systems can be active for the same session. `Passive` — The passive system does not initiate a session. It only responds to a request for session initialization from the active system. The default is active.

Defaults

Refer to Parameters.

Command Modes

ROUTER OSPF

ROUTER OSPFv3

ROUTER BGP

ROUTER ISIS

INTERFACE (BFD for VRRP only)

Supported Modes

Full–Switch

Command History

Version	Description
9.9(0.0)	Introduced on the FN IOM.
9.2(0.0)	Introduced on the MXL 10/40GbE Switch IO Module.

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 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/disable values configured with the bfd neighbor command or configured for the peer group to which a neighbor belongs. The neighbors inherit only the global timer values (configured with the bfd neighbor command).

Related Commands

show bfd neighbors — displays BFD neighbor information on all interfaces or a specified interface.

bfd neighbor — explicitly enables a BFD session with a BGP neighbor or a BGP peer group.

neighbor bfd disable — explicitly disables a BFD session with a BGP neighbor or a BGP peer group.