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display mpls bfd session

Function

The display mpls bfd session command displays information about BFD sessions for MPLS.

Format

display mpls bfd session [ fec fec-address | monitor | nexthop ip-address | outgoing-interface interface-type interface-number | statistics | verbose ]

display mpls bfd session protocol ldp [ fec fec-address [ verbose ] ]

display mpls bfd session protocol { cr-static | rsvp-te } [ lsp-id ingress-lsr-id session-id lsp-id [ verbose ] ]

display mpls bfd session protocol bgp [ fec fec-address [ verbose ] ]

Parameters

Parameter Description Value
fec fec-address Displays information about the BFD session of a specified FEC. The value is in dotted decimal notation.
monitor Displays monitoring information of BFD sessions. -
nexthop ip-address Displays information about the BFD session of a specified next hop. The value is in dotted decimal notation.
outgoing-interface interface-type interface-number Displays information about the BFD session of the LSP with a specified outbound interface.
  • interface-type specifies the type of the interface.
  • interface-number specifies the number of the interface.
 -
protocol Indicates the type of the protocol. -
cr-static Displays information about the BFD session for static CR-LSP. -
ldp Displays information about the BFD session for LDP. -
rsvp-te Displays information about the BFD session for RSVP-TE. -
statistics Displays statistics about BFD sessions such as the total number of BFD sessions. -
verbose Displays detailed information about BFD sessions. -
lsp-id ingress-lsr-id Specifies the LSR ID of the ingress. The value is in dotted decimal notation.
session-id Specifies the ID of a session. The value is an integer ranging from 0 to 65535.
lsp-id Specifies the LSP ID. The value is an integer ranging from 0 to 65535.
bgp Displays information about BFD sessions for BGP. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Run the display mpls bfd session command to view information about a BFD session and the LSP detected by BFD, including the destination address and outbound interface of the LSP, the local discriminator of the BFD session, and the status of an MPLS BFD session.

Example

# Display information about the BFD session.

<HUAWEI> display mpls bfd session
-------------------------------------------------------------------------------
                 BFD Information: LDP  LSP
-------------------------------------------------------------------------------
FEC            DISC  OUT-IF      NEXTHOP        TUNNEL         STATE
3.3.3.3        8     VLANIF100   10.1.1.2       Tunnel1        Up
Table 1 Description of the display mpls bfd session command output

Item

Description

FEC

Forwarding equivalence class.

DISC

Local discriminator of a BFD session.

OUT-IF

Outbound interface.

NEXTHOP

IP address of the next hop.

TUNNEL

Name of a tunnel.

STATE
Status of an MPLS BFD session.
  • Up
  • Down

# Display detailed information about a BFD session with the specified protocol type and LSP ID.

<HUAWEI> display mpls bfd session protocol rsvp-te lsp-id 3.3.3.3 3 1 verbose
--------------------------------------------------------------------- 
                 BFD Information: TE TUNNEL                                     
--------------------------------------------------------------------- 
  No                       :  1                                                 
  LspIndex                 :  6157                                              
  Protocol                 :  RSVP-TE                                           
  Tunnel-Interface         :  Tunnel1                                       
  Fec                      :  2.2.2.2                                           
  Nexthop                  :  10.2.3.2                                         
  Out-Interface            :  Vlanif100                              
  Bfd-Discriminator        :  8195                                              
  TEMIB Tunn Table Index   :  3                                                 
  SessionTunnelID          :  3                                                 
  LocalLspId               :  1                                                 
  PrevSessionTunnelID      :  -                                                 
  NextSessionTunnelID      :  12                                                
  ActTx                    :  2200                                              
  ActRx                    :  2200                                              
  ActMulti                 :  -                                                 
  Bfd-State                :  Down                                              
  Time                     :  2559 sec
Table 2 Description of the display mpls bfd session protocol rsvp-te lsp-id 3.3.3.3 3 1 verbose command output

Item

Description

No

Serial number.

LspIndex

Index number of an LSP.

Protocol

Protocol type.

Tunnel-Interface

Name of a tunnel interface.

Fec

Forwarding equivalence class.

Nexthop

IP address of the next hop.

Out-Interface

Name of an outbound interface.

Bfd-Discriminator

Local discriminator of a BFD session.

TEMIB Tunn Table Index

Index of the tunnel entry to which an LSP corresponds.

SessionTunnelID

BFD session ID.

LocalLspId

ID of a local LSP.

PrevSessionTunnelID

Tunnel ID mapping the previous LSP to which a BFD session is bound.

NextSessionTunnelID

Tunnel ID mapping the next LSP to which a BFD session is bound.

ActTx

Actual interval for sending BFD packets, in milliseconds.

ActRx

Actual interval for receiving BFD packets, in milliseconds.

ActMulti

Actual local detection multiple of a BFD session.

Bfd-State
Status of the BFD session.
  • Up
  • Down

Time

Period from the time when the BFD session is created or updated till now, in seconds.

# Display BFD session statistics.

<HUAWEI> display mpls bfd session statistics
Lsp Type       sess num  Tx        Rx        Mult      Trig-type
LDP LSP        0         1000      1000      3         NONE
BGP LSP        0         1000      1000      3         NONE
STATIC CRLSP   0         1000      1000      3         -
RSVP           0         1000      1000      3         -
TOTAL          0
Table 3 Description of the display mpls bfd session statistics command output

Item

Description

Lsp Type

LSP type.

sess num

Number of BFD sessions monitoring the LSP.

Tx

Effective minimum interval (in ms) at which BFD packets are sent.

Rx

Effective minimum interval (in ms) at which BFD packets are received.

Mult

Effective BFD detection multiplier.

Trig-type

BFD session establishment policy:

  • HOST: BFD sessions are established using host addresses.

  • IP-PREFIX: BFD sessions are established using an IP address prefix list.

  • FEC-LIST: BFD sessions are established using a FEC list.

  • NONE: No policy for establishing BFD sessions is configured.

  • -: N/A

# Display BFD session monitoring information.

<HUAWEI> display mpls bfd session monitor

LDP BFD TRIGGER INFO:
  Trig-Type  : None
  OutIfIndex : Invalid
  NextHop    : Invalid

LDP BFD SCAN INFO:
  Cur BackGround Oper  : Off
  Cur Scan Index       : Invalid
  First Bfd Scan Index : Invalid
  Scan Again           : No
  License Lim Reached  : No
  License Lim Scn Agn  : No
  BackGround Status    : Suspended/Off
  Current Scan Node    : -

BGP BFD SCAN INFO:
  Cur BackGround Oper  : Off
  Cur Scan Index       : Invalid
  Scan Again           : No
  License Lim Reached  : No
  BackGround Status    : Suspended/Off

TE BFD SCAN INFO:
  Cur BackGround Oper  : Off
  Cur Scan Index       : 0
  First Bfd Scan Index : 0
  Scan Again           : No
  License Lim Reached  : No
  License Lim Scn Agn  : No
  BackGround Status    : Suspended/Off

CAPABILITY :
  Bfd Capability     : Disable
  Ldp Bfd Capability : Disable
  Bgp Bfd Capability : Disable
  Te Bfd Capability  : Disable
  Bfd Session Full   : Not-full
  Bfd Clearing       : No


BFD FOR LSP PAF LICENSE INFORMATION:
Lsp Type  Min-Val   Max-Val   Avail-Val Created
LDP LSP   0         1024      1024      0
BGP LSP   0         1024      1024      0
TE LSP    0         2048      256       0 + 0 (RSVP + CRSTATIC)
Table 4 Description of the display mpls bfd session monitor command output

Item

Description

Trig-Type

BFD session establishment policy:

  • HOST: BFD sessions are established using host addresses.

  • IP-PREFIX: BFD sessions are established using an IP address prefix list.

  • FEC-LIST: BFD sessions are established using a FEC list.

  • NONE: No policy for establishing BFD sessions is configured.

  • -: N/A

OutIfIndex

Index of a BFD session outbound interface.

NextHop

Next-hop IP address of a BFD session.

Cur BackGround Oper

Background operation:

  • Create

  • Delete

  • Update

  • Off

Cur Scan Index

Scanned BFD session index. "Invalid" indicates that no BFD session is established.

First Bfd Scan Index

First scanned BFD session index. "Invalid" indicates that no BFD session is established.

Scan Again

Whether a device scans BFD sessions again:

  • Yes

  • No

License Lim Reached

Whether the number of established BFD sessions reaches the upper limit specified in the license file:

  • Yes

  • No

License Lim Scn Agn

Whether the switch needs to check the threshold-crossing event about establishment BFD sessions:

  • Yes

  • No

BackGround Status

Background status:

  • Running

  • Suspended/Off

Current Scan Node

Name of a node that is being scanned.

Bfd Capability

Whether MPLS BFD is enabled:

  • Enable

  • Disable

Ldp Bfd Capability

Whether BFD for LDP is enabled:

  • Enable

  • Disable

Bgp Bfd Capability

Whether BFD for BGP tunnel is enabled:

  • Enable

  • Disable

Te Bfd Capability

Whether BFD for Traffic Engineering (TE) is enabled:

  • Enable

  • Disable

Bfd Session Full

Whether the number of created BFD sessions reaches the upper limit:

  • Full: The number of created BFD sessions reached the upper limit.

  • Not-full: The number of created BFD sessions is lower than the upper limit.

Bfd Clearing

Whether BFD is disabled globally:

  • Yes

  • No

Lsp Type

LSP type

Min-Val

Minimum number of supported LSPs specified in the license file.

Max-Val

Maximum number of supported LSPs specified in the license file.

Avail-Val

Average number of supported LSPs specified in the license file.

Created

Number of established LSPs.
Parent Topic: Basic MPLS Configuration Commands
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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