BFD configuration commands 1

bfd detect-multiplier 1

bfd echo-source-ip· 1

bfd min-echo-receive-interval 2

bfd min-receive-interval 2

bfd min-transmit-interval 3

bfd multi-hop destination-port 4

bfd session init-mode· 4

display bfd debugging-switches 5

display bfd interface· 6

display bfd session· 7

reset bfd session statistics 10

 

bfd detect-multiplier

Syntax

bfd detect-multiplier value

undo bfd detect-multiplier

View

Interface view

Default level

2: System level

Parameters

value: Specifies the detect time multiplier in the range of 3 to 50.

Description

Use bfd detect-multiplier to configure the detection time multiplier.

Use undo bfd detect-multiplier to restore the default.

The default is 5.

Examples

# Configure the detection time multiplier as 6 on VLAN-interface 1.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface1] bfd detect-multiplier 6

bfd echo-source-ip

Syntax

bfd echo-source-ip ip-address

undo bfd echo-source-ip

View

System view

Default level

2: System level

Parameters

ip-address: Source IP address of BFD echo packets.

Description

Use bfd echo-source-ip to configure the source IP address of BFD echo packets.

Use undo bfd echo-source-ip to remove the configured source IP address of BFD echo packets.

Since a large amount of ICMP redirect packets might be sent by the remote switch, causing network congestion, do not configure the source IP address of the BFD echo packets to belong to the same network segment as any interface address of the switch.

Examples

# Configure the source IP address of echo packets as 10.1.1.1.

<Sysname> system-view

[Sysname] bfd echo-source-ip 10.1.1.1

bfd min-echo-receive-interval

Syntax

bfd min-echo-receive-interval value

undo bfd min-echo-receive-interval

View

Interface view

Default level

2: System level

Parameters

value: Minimum echo receiving interval, in milliseconds. The value range and default value depend on the main processing unit (MPU) model of the switch:

·     For switches with MPU LSR1SRP2D1, LSR1SRP2C1, or LSR1SRP2C2, the value is in the range of 10 to 1000, and must be a multiple of 10. The default value is 400.

·     For switches with MPU LSR1SRP2B1 or LSR1SRP2B2, the value is in the range of 1000 to 10000, and must be a multiple of 100. The default value is 1000.

Description

Use bfd min-echo-receive-interval to configure the minimum echo packet receiving interval on the interface.

Use undo bfd min-echo-receive-interval to restore the default.

By default, the minimum BFD echo packet receiving interval on the interface is 400 milliseconds.

Examples

# Configure the minimum echo receiving interval on VLAN-interface 1 as 500 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface1] bfd min-echo-receive-interval 500

bfd min-receive-interval

Syntax

bfd min-receive-interval value

undo bfd min-receive-interval

View

Interface view

Default level

2: System level

Parameters

value: Minimum interval for receiving BFD control packets, in milliseconds. The value range and default value depend on the MPU model of the switch:

·     For switches with LSR1SRP2D1, MPU LSR1SRP2C1, or LSR1SRP2C2, the value is in the range of 10 to 1000, and must be a multiple of 10. The default value is 400.

·     For switches with MPU LSR1SRP2B1 or LSR1SRP2B2, the value is in the range of 1000 to 10000, and must be a multiple of 100. The default value is 1000.

Description

Use bfd min-receive-interval to configure the minimum interval for receiving BFD control packets.

Use undo bfd min-receive-interval to restore the default.

By default, the minimum interval for receiving BFD control packets is 400 milliseconds.

If the remote switch sends BFD control packets at an interval shorter than the minimum receiving interval of the local switch, the remote switch changes its sending interval to the minimum receiving interval of the local switch.

Examples

# Configure the minimum interval for receiving BFD control packets on VLAN-interface 1 as 500 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface1] bfd min-receive-interval 500

bfd min-transmit-interval

Syntax

bfd min-transmit-interval value

undo bfd min-transmit-interval

View

Interface view

Default level

2: System level

Parameters

value: Minimum interval for transmitting BFD control packets, in milliseconds. The value range and default value depend on the MPU model of the switch:

·     For switches with LSR1SRP2D1, MPU LSR1SRP2C1 or LSR1SRP2C2, the value is in the range of 10 to 1000, and must be a multiple of 10. The default value is 400.

·     For switches with MPU LSR1SRP2B1 or LSR1SRP2B2, the value is in the range of 1000 to 10000, and must be a multiple of 100. The default value is 1000.

Description

Use bfd min-transmit-interval to configure the minimum interval for transmitting BFD control packets.

Use undo bfd min-transmit-interval to restore the default.

By default, the minimum interval for transmitting BFD control packets is 400 milliseconds.

A proper interval ensures BFD control packets are not transmitted faster than the switch can deal with. The actual interval for transmitting BFD control packets at the local switch should be the greater between the minimum interval for sending BFD control packets configured on the local interface and the minimum interval for receiving BFD control packets on the remote switch.

Examples

# Configure the minimum interval for transmitting BFD control packets on VLAN-interface 1 as 500 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface1] bfd min-transmit-interval 500

bfd multi-hop destination-port

Syntax

bfd multi-hop destination-port port-number

undo bfd multi-hop destination-port

View

System view

Default level

2: System level

Parameters

port-number: Destination port number of multi-hop BFD control packets, 3784 or 4784.

Description

Use bfd multi-hop destination-port to configure the destination port number for multi-hop BFD control packets as 3784 or 4784.

Use undo bfd multi-hop destination-port to restore the default.

By default, the destination port number for multi-hop BFD control packets is 4784.

Examples

# Configure the destination port number for multi-hop BFD control packets as 3784.

<Sysname> system-view

[Sysname] bfd multi-hop destination-port 3784

bfd session init-mode

Syntax

bfd session init-mode { active | passive }

undo bfd session init-mode

View

System view

Default level

2: System level

Parameters

active: Uses the active mode. In the active mode, upon being enabled with BFD, an interface actively transmits a BFD control packet to the remote switch.

passive: Uses the passive mode. In the passive mode, an interface does not actively transmit a BFD control packet to the remote end; it transmits a BFD control packet only after receiving a BFD control packet from the remote end.

Description

Use bfd session init-mode to configure the mode for establishing a BFD session.

Use undo bfd session init-mode to restore the default.

By default, BFD sessions are established in the active mode.

 

NOTE: At least one end must operate in the active mode for a BFD session to be established.

 

Examples

# Configure the session establishment mode as passive.

<Sysname> system-view

[Sysname] bfd session init-mode passive

display bfd debugging-switches

Syntax

display bfd debugging-switches [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display bfd debugging-switches to display enabled BFD debugging switches.

Examples

# Display enabled BFD debugging switches.

<Sysname> display bfd debugging-switches

BFD Error debugging is on

BFD Event debugging is on

BFD FSM debugging is on

BFD Packet Receive debugging is on

BFD Packet Send debugging is on

BFD SCM debugging is on

BFD Timer debugging is on

display bfd interface

Syntax

display bfd interface [ verbose ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

verbose: Displays detailed interface information.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display bfd interface to display information about BFD-enabled interfaces.

Besides the information displayed by the display bfd interface command, the display bfd interface verbose command displays brief session information of the interfaces.

Examples

# Display information about BFD-enabled interfaces.

<Sysname> display bfd interface

 

Total Interface Num: 1

 

      Interface: Vlan-interface500      Session Num: 1

Min Trans Inter: 200ms               Min Recv Inter: 200ms

     DetectMult: 3              Min Echo Recv Inter: 400ms

# Display detailed information about BFD-enabled interfaces.

<Sysname> display bfd interface verbose

 

Total Interface Num: 1

 

      Interface: Vlan-interface500      Session Num: 1

Min Trans Inter: 200ms               Min Recv Inter: 200ms

     DetectMult: 3              Min Echo Recv Inter: 400ms

 

LD/RD       SourceAddr      DestAddr        ConnType  State     Mode

2/2         192.168.11.11   192.168.11.10   Direct    Up        Ctrl

Table 1 Command output

Field	Description
Interface	Interface name.
Session Num	Number of sessions established on the local interface.
Min Trans Inter	Minimum control packet transmit interval configured on the interface.
Min Recv Inter	Minimum control packet receive interval configured on the interface.
DetectMult	Detection time multiplier.
Min Echo Recv Inter	Minimum echo packet receive interval configured on the interface.
LD	Local ID of the session.
RD	Remote ID of the session.
SourceAddr	Source IP address of the session.
DestAddr	Destination IP address of the session.
ConnType	Connection type of the interface.
State	Session state.
Mode	Working mode of the session: control (Ctrl) mode or echo (Echo) mode.

 

display bfd session

Syntax

Standalone mode:

display bfd session [ slot slot-number [ all | verbose ] | verbose ] [ | { begin | exclude | include } regular-expression ]

IRF mode:

display bfd session [ chassis chassis-number slot slot-number [ all | verbose ] | verbose ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

verbose: Displays detailed session information.

slot slot-number: Displays the session information of the specified card. The slot-number argument refers to the card slot number. Use this option when your switch is operating in standalone mode.

all: Displays detailed information about all the BFD sessions on the card.

chassis chassis-number slot slot-number: Displays the session information of a card on an IRF member switch. The chassis-number argument refers to the ID of the member switch, and the slot-number argument refers to the number of the slot. You can display the member ID and slot number with the display device command. Use this option when your switch is operating in IRF mode.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use display bfd session to display BFD session information.

·     If no slot number is specified, all the BFD session information of the device is displayed. If the all keyword is specified, the command displays the detailed BFD session information on the MPU in the specified slot (standalone mode).

·     If no chassis number or slot number is specified, all the BFD session information of the current member device is displayed. If the all keyword is specified together with a card and a member device, the command displays the detailed BFD session information on the specified MPU of the specified IRF member device (IRF mode).

Examples

# Display detailed information about the BFD sessions maintained by all the cards (standalone mode).

<Sysname> display bfd session verbose

 

Total session number: 2   Up session number: 2   Init Mode: Active

 

Ipv4 session working under Ctrl mode:

 

     Local Discr: 1                   Remote Discr: 1

       Source IP: 192.168.11.11     Destination IP: 192.168.11.10

   Session State: Up                     Interface: Vlan-interface1000

 Min Trans Inter: 200ms            Act Trans Inter: 200ms

Min Recv Inter: 200ms           Act Detect Inter: 1000ms

  Running Up for: 00:02:36               Auth mode: None

    Connect Type: Direct                 Board Num: 0

        Protocol: OSPF/RSVP/MFW

       Diag Info: No Diagnostic

 

     Local Discr: 2                   Remote Discr: 2

       Source IP: 192.168.12.11     Destination IP: 192.168.12.10

   Session State: Up                     Interface: GigabitEthernet4/0/2

 Min Trans Inter: 200ms            Act Trans Inter: 200ms

  Min Recv Inter: 200ms           Act Detect Inter: 1000ms

  Running Up for: 00:02:36               Auth mode: None

    Connect Type: Direct                 Board Num: 0

        Protocol: OSPF/RSVP/MFW

       Diag Info: No Diagnostic

# Display detailed information about the BFD sessions maintained by slot 0 on chassis 1 (distributed IRF member device).

<Sysname> display bfd session chassis 1 slot 0 verbose

 

Ipv4 session working under Ctrl mode:

 

     Local Discr: 1                   Remote Discr: 1

       Source IP: 192.168.11.11     Destination IP: 192.168.11.10

   Session State: Up                     Interface: GigabitEthernet1/3/0/2

 Min Trans Inter: 200ms            Act Trans Inter: 200ms

  Min Recv Inter: 200ms           Act Detect Inter: 1000ms

    Recv Pkt Num: 16927                Send Pkt Num: 17146

       Hold Time: 800ms                 Auth mode: None

    Connect Type: Direct                Chassis/Board Num: 1/0

        Protocol: OSPF/RSVP/MFW

       Diag Info: No Diagnostic

Table 2 Command output

Field	Description
Total session number	Total number of BFD sessions.
Up session number	Total number of active BFD sessions.
Init mode	BFD operating mode, active or passive.
session working under xx mode	IPv4/IPv6 BFD session mode: ·     Ctrl—Control packet mode. ·     Echo—Echo mode.
Local Discr	Local ID of the session.
Remote Discr	Remote ID of the session.
Source IP	Source IP address of the session.
Destination IP	Destination IP address of the session.
Session State	Session state.
Interface	Name of the interface of the session.
Min Trans Inter	Expected minimum transmit interval configured on the interface.
Min Recv Inter	Expected minimum receive interval configured on the interface.
Act Trans Inter	Actual transmit interval.
Act Detect Inter	Actual session detection timer.
Recv Pkt Num	Number of packets received.
Send Pkt Num	Number of packets sent.
Hold Time	Length of time before session detection timer expires.
Auth mode	Session authentication mode. The switch does not support authentication.
Connect Type	Connection type of the interface.
Running up for	Time interval for which the session has been up.
Chassis/Board Num	Chassis/card maintaining the session.
Protocol	Registered protocol.
Diag Info	Diagnostic information about the session.

 

reset bfd session statistics

Syntax

In standalone mode:

reset bfd session statistics [slot slot-number ]

In IRF mode:

reset bfd session statistics [ chassis chassis-number slot slot-number ]

View

User view

Default level

1: Monitor level

Parameters

slot slot-number: Specifies a card by its slot number. Use this option when your switch is operating in standalone mode.

chassis chassis-number slot slot-number: Specifies a card on an IRF member switch. The chassis-number argument represents the ID of the IRF member switch, and the slot-number argument represents the number of the slot that holds the card. You can display the member ID and slot number with the display device command. Use this option when your switch is operating in IRF mode.

Description

Use reset bfd session statistics to clear the BFD session statistics of the current protocol. If a slot number is specified, statistics about the BFD sessions maintained by the specified board will be cleared.

Examples

# Clear statistics about the BFD sessions in Slot 6.

<Sysname> reset bfd session statistics slot 6

# Clear statistics about the BFD sessions in Slot 6 of Chassis 1.

<Sysname> reset bfd session statistics chassis 1 slot 6