display bfd session

Function

The display bfd session command views information about the BFD session.

Format

display bfd session { all | static } [ for-ip | for-ipv6 ] [ verbose ]

display bfd session { dynamic | discriminator local-discr-value | peer-ip { default-ip | peer-ip [ vpn-instance vpn-instance-name ] } | static-auto } [ verbose ]

display bfd session peer-ipv6 peer-ipv6 [ vpn-instance vpn-instance-name ] [ verbose ]

Parameters

Parameter	Description	Value
all	Displays information about all BFD sessions.	-
static	Displays information about the static BFD session.	-
for-ip	Displays the configuration of a BFD session that monitors an IPv4 link.	-
for-ipv6	Displays the configuration of a BFD session that monitors an IPv6 link.	-
discriminator local-discr-value	Displays information about the BFD session with a specified local discriminator.	It is an integer ranging from 1 to 16383.
dynamic	Displays information about all dynamic BFD sessions.	-
peer-ip peer-ip	Displays information about the BFD session bound to the peer with a specified IP address.	It is in dotted decimal notation.
default-ip	Display statistics about a BFD session with a default multicast address.	-
peer-ipv6 peer-ipv6	Displays information about the BFD session bound to the peer with a specified IPv6 address.	-
vpn-instance vpn-instance-name	Displays information about the BFD session bound with a specified VPN instance.	It must be the name of the existing VPN instance configured with the RD.
static-auto	Displays information about the static BFD session with automatically negotiated discriminators.	-
verbose	Displays detailed information about the BFD session.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

No matter whether a static BFD session with an auto-negotiated discriminator is the same as a dynamic BFD session or not, both the BFD sessions are displayed as dynamic sessions when the BFD type (static or dynamic) is queried.

Example

# Display brief information about all BFD sessions.

<sysname> display bfd session all
--------------------------------------------------------------------------------
Local Remote     PeerIpAddr      State     Type        InterfaceName
--------------------------------------------------------------------------------
2     1          10.1.1.2        Up        S_IP_PEER         -
3     3          10.1.1.2        Up        S_IP_IF     GigabitEthernet0/0/0
5     4          224.0.0.184     Up        S_IP_IF     GigabitEthernet0/0/0
--------------------------------------------------------------------------------
     Total UP/DOWN Session Number: 3/0

**Table 1** Description of the **display bfd session all** command output
Item	Description
Local	Indicates local discriminator.
Remote	Indicates remote discriminator.
PeerIpAddr	Indicates IP address of the peer.
State	Indicates the session status. The value can be: Up: indicates the BFD session is in the Up state. Down: indicates the BFD session is in the Down state. AdminDown: If the shutdown (BFD session view) command is used, the BFD session enters the AdmDown state. Init: indicates the BFD session is in the Init state.
Type	Indicates the binding types of the BFD session.
Interface Name	Indicates the outbound interface bound to the BFD session. Because the interface is not bound to the multi-hop BFD session, "-" is displayed in this field.
Total UP/DOWN Session Number :	Indicates the number of the current sessions in the Up and Down states.

# Display the details of all BFD sessions.

<sysname> display bfd session all verbose
--------------------------------------------------------------------------------
Session MIndex : 16384      State : Up        Name : test
--------------------------------------------------------------------------------
  Local Discriminator    : 60               Remote Discriminator   : 20
  Session Detect Mode    : Asynchronous Mode Without Echo Function
  BFD Bind Type          : Interface(GigabitEthernet0/0/1)
  Bind Session Type      : Static
  Bind Peer IP Address   : 1.1.1.1
  Bind Interface         : GigabitEthernet0/0/1
  Track Interface        : -
  FSM Board Id           : 0                TOS-EXP                : 6  
  Min Tx Interval (ms)   : 1000             Min Rx Interval (ms)   : 1000  
  Actual Tx Interval (ms): 1000             Actual Rx Interval (ms): 1000 
  Local Detect Multi     : 3                Detect Interval (ms)   : 3000
  Echo Passive           : Disable          Acl Number             : -   
  Destination Port       : 3784
  Proc interface status  : Disable  
  WTR Interval (ms)      : --              
  Active Multi           : 3    
  Last Local Diagnostic  : Control Detection Time Expired
  Bind Application       : PBR
  Session TX TmrID       : 4108             Session Detect TmrID   : 4109  
  Session Init TmrID     : --               Session WTR TmrID      : --  
  PDT Index              : FSM-0|RCV-0|IF-0|TOKEN-0   
  Session Description    : --    
-------------------------------------------------------------------------------

**Table 2** 2 Description of the **display bfd session all verbose** command output
Item	Description
Session MIndex	Index of a BFD session entry
State	Current status of the BFD session: Up: indicates the BFD session is in the Up state. Down: indicates the BFD session is in the Down state. AdminDown: If the shutdown (BFD session view) command is used, the BFD session enters the AdmDown state. Init: indicates the BFD session is in the Init state.
Name	Name of the BFD session
Local Discriminator	Local discriminator
Remote Discriminator	Remote discriminator
Session Detect Mode	Session detection mode
BFD Bind Type	Binding type of a BFD session: Peer Ip Address: detects the multi-hop IP link. For IP-link one-hop detection or the multi-hop detection of the specified next hop, the field is displayed as Interface and bound local interface. S_Auto: indicates the statically created BFD session with automatically negotiated discriminators.
Bind Session Type	Type of the BFD session: Static: indicates the static BFD session. Dynamic: indicates the BFD session that is created dynamically. S_Auto: indicates the static BFD session with automatically negotiated discriminators.
Bind Peer IP Address	Peer IP address of the session
Bind Interface	Outbound interface bound to the BFD session
Track Interface	Interface tracked by the BFD session.
Bind Source IP Address	Source IP address of the local interface bound to the BFD session The field can be displayed only when the source IP address is specified for the BFD session in the bfd bind peer-ip or bfd bind peer-ip default-ip command.
FSM Board Id	Main processing board number of the state machine
TOS-EXP	Priority of the BFD packet
Min Tx Interval (ms)	Configured minimum interval for sending a BFD packet
Min Rx Interval (ms)	Configured minimum interval for receiving a BFD packet
Actual Tx Interval (ms)	Actual minimum sending interval
Actual Rx Interval (ms)	Actual minimum receiving interval
Local Detect Multi	Configured local detection multiplier
Detect Interval (ms)	Detection interval
Echo Passive	Passive echo mode If the passive echo mode is triggered, the field is displayed as Enable; otherwise, the field is displayed as Disable.
Destination Port	Destination port
WTR Interval (ms)	Time of WTR
Proc interface status	Association between the status of the BFD session and the bound interface. The device does not support the association between the interface and the status. The field is displayed as Disable.
Active Multi	Active detection multiplier. This field is displayed only when the session status is Up.
Local Demand Mode	Local demand mode If the demand mode is configured locally, the field is displayed as Enable; otherwise, the field is displayed as Disable.
Last Local Diagnostic	Local diagnostic reason for the Down state of the last session
Bind Application	Bound application. For example, in the interworking between the policy-based route and BFD, the field is displayed as PBR when the session is in Up state.
Session TX TmrID	Timer for session sending packet
Session Detect TmrID	Timer for session detection
Session Init TmrID	Timer for session state machine initialization
Session WTR TmrID	Timer for session to wait for recovery
PDT Index	Product information
Session Description	Descriptions of the BFD session