display mpls bfd session protocol ldp

Function

The display mpls bfd session protocol ldp command displays information about dynamic BFD for LDP LSP sessions.

Format

display mpls bfd session protocol ldp [ fec ip-address ] [ bfd-type { ldp-tunnel | ldp-lsp } ]

display mpls bfd session protocol ldp [ fec ip-address ] [ bfd-type { ldp-tunnel | ldp-lsp } ] verbose

Parameters

Parameter	Description	Value
fec ip-address	Displays information about a BFD session for an LSP mapped to a specified FEC.	Expressed in dotted decimal notation.
bfd-type	Specifies the type of BFD session.	-
ldp-tunnel	Displays information about BFD sessions that monitor LDP tunnels.	-
ldp-lsp	Displays information about BFD sessions that monitor LDP LSPs.	-
verbose	Displays detailed information about BFD sessions.	-

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
mpls-ldp	read

Usage Guidelines

Usage Scenario

To view information about LDP LSPs monitored by BFD, run the display mpls bfd session protocol ldp command. The command output includes the destination address and outbound interface name of an LSP, the local discriminator of the dynamic BFD session, and the status of an MPLS BFD session.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display detailed information about a dynamic BFD session.

<HUAWEI> display mpls bfd session protocol ldp verbose
--------------------------------------------------------------------------------
                        BFD Information: LDP  Tunnel                           
--------------------------------------------------------------------------------
  No                     : 1
  LspIndex               : 5000003
  Protocol               : LDP
  Fec                    : 2.2.2.9
  Bfd-Discriminator      : 16385
  ActTx                  : 10
  ActRx                  : 10
  ActMulti               : 3
  Bfd-State              : Up
  Time                   : 923 sec
--------------------------------------------------------------------------------
                        BFD Information: LDP  LSP                           
--------------------------------------------------------------------------------
  No                     : 1
  LspIndex               : 5000006
  Protocol               : LDP
  Fec                    : 4.4.4.9
  Nexthop                : 10.1.1.2
  Out-Interface          : GE0/1/16
  Bfd-Discriminator      : 16388
  ActTx                  : 600
  ActRx                  : 100
  ActMulti               : 3
  Bfd-State              : Up
  Time                   : 249381 sec

# Display information about a dynamic BFD session.

<HUAWEI> display mpls bfd session protocol ldp
-------------------------------------------------------------------------------
                        BFD Information: LDP  Tunnel
-------------------------------------------------------------------------------
FEC             DISC  OUT IF           NEXTHOP         TUNNEL         STATE    
-------------------------------------------------------------------------------
4.4.4.9         16388 -                -               -              Up
-------------------------------------------------------------------------------
                        BFD Information: LDP  LSP
-------------------------------------------------------------------------------
FEC             DISC  OUT IF           NEXTHOP         TUNNEL         STATE    
-------------------------------------------------------------------------------
2.2.2.9         16385 GE0/1/16          10.1.1.2        -              Down
3.3.3.9         16386 GE0/1/18          10.1.2.2        -              Down
4.4.4.9         16387 GE0/1/18          10.1.2.2        -              Up

**Table 1** Description of the **display mpls bfd session protocol ldp** command output
Item	Description
BFD Information	Object that a BFD session monitors: LDP LSP. TE tunnel. LDP tunnel. BGP Tunnel.
No	Sequence number.
LspIndex	Index number of an LSP.
Protocol	Protocol type: LDP. RSVP-TE.
Bfd-Discriminator	Local discriminator of a BFD session.
ActTx	Effective minimum interval at which BFD packets are sent.
ActRx	Effective minimum interval at which BFD packets are received.
ActMulti	Effective local detection multiplier of a BFD session.
Bfd-State	Status of a BFD session: Up: The BFD session is Up. Down: The BFD session is Down. AdminDown: The administrator manually closes the BFD session. Init: The BFD session is in the Initial state.
Time	Time elapsed since a BFD session was created or refreshed.
Out-Interface	Name of an outbound interface.
FEC	Forwarding equivalence class value.
DISC	Local discriminator of a BFD session.
OUT IF	Name of an outbound interface.
NEXTHOP	IP address of the next hop.
TUNNEL	Tunnel type.
STATE	Status of an MPLS BFD session: Up: The BFD session is Up. Down: The BFD session is Down. AdminDown: The administrator manually closes the BFD session. Init: The BFD session is in the Initial state.