Table of Contents

Chapter 1 BFD Configuration Commands. 1-1

1.1 BFD Configuration Commands. 1-1

1.1.1 bfd authentication-mode. 1-1

1.1.2 bfd detect-multiplier 1-2

1.1.3 bfd echo-source-ip. 1-3

1.1.4 bfd min-echo-receive-interval 1-3

1.1.5 bfd min-receive-interval 1-4

1.1.6 bfd min-transmit-interval 1-5

1.1.7 bfd session init-mode. 1-5

1.1.8 display bfd interface. 1-6

1.1.9 display bfd paf 1-8

1.1.10 display bfd session. 1-8

1.1.11 reset bfd session statistics. 1-10

1.1.12 snmp-agent trap enable bfd. 1-11

Chapter 2 GR Commands. 2-1

2.1 GR Commands. 2-1

 

Chapter 1  BFD Configuration Commands

1.1  BFD Configuration Commands

1.1.1  bfd authentication-mode

Syntax

bfd authentication-mode{md5 key-id key | sha1 key-id key | simple key-id password  }

undo bfd authentication-mode

View

Interface view

Parameters

md5: Uses message digest 5 (MD5) authentications.

sha1: Uses secure hash algorithm (SHA-1) authentication.

simple: Uses plaint text authentication.

key-id: Authentication key ID, in the range 1 to 255.

key: A string of 1 to 16 characters. It is displayed as a 24-byte cipher text string when the display current-configuration command is executed.

password: Password, a string of 1 to 16 characters when the simple keyword is used. It is displayed when the display current-configuration command is executed.

Description

Use the bfd authentication-mode command to configure the BFD authentication mode and key on the interface.

Use the undo bfd authentication-mode command to remove the authentication mode on the interface (only one authentication mode can be configured on an interface).

By default, no authentication is configured on an interface.

 

 

Examples

# Configure VLAN-interface 1 to support MD5 authentication, setting the authentication key-id to 15 and authentication key to BfdKey.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface 1] bfd authentication-mode md5 15 BfdKey

1.1.2  bfd detect-multiplier

Syntax

bfd detect-multiplier value

undo bfd detect-multiplier

View

Interface view

Parameters

value: Maximum number of consecutive BFD control packets that the remote device fails to receive from the local device interface before considering the BFD session down, in the range of 3 to 50.

Description

Use the bfd detect-multiplier command to configure the maximum number of consecutive BFD control packets that the remote device fails to receive from the local device before considering the BFD session down.

Use the undo bfd detect-multiplier command to restore the default.

The default is 5.

Examples

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

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface 1] bfd detect-multiplier 6

1.1.3  bfd echo-source-ip

Syntax

bfd echo-source-ip ip-address

undo bfd echo-source-ip

View

System view

Parameters

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

Description

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

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

Note that, since a large amount of ICMP redirect packets may be sent by the remote device, 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 device.

Examples

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

<Sysname> system-view

[Sysname] bfd echo-source-ip 10.1.1.1

1.1.4  bfd min-echo-receive-interval

Syntax

bfd min-echo-receive-interval value

undo bfd min-echo-receive-interval

View

Interface view

Parameters

value: Minimum BFD echo receiving interval, in milliseconds. This value is in the range of 200 to 1000 and defaults to 400.

Description

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

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

The default value is 400 milliseconds.

Examples

# Configure the minimum BFD echo receiving interval on VLAN-interface 1 as 300 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface 1] bfd min-echo-receive-interval 300

1.1.5  bfd min-receive-interval

Syntax

bfd min-receive-interval value

undo bfd min-receive-interval

View

Interface view

Parameters

value: Minimum interval for receiving BFD control packets, in milliseconds. It is a multiple of 100 milliseconds. It is in the range of 200 ms to 1000 ms and defaults to 400 ms.

Description

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

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

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

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

Examples

# Configure the minimum interval for receiving BFD control packets on VLAN-interface 1 as 300 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface 1] bfd min-receive-interval 300

1.1.6  bfd min-transmit-interval

Syntax

bfd min-transmit-interval value

undo bfd min-transmit-interval

View

Interface view

Parameters

value: Minimum interval for transmitting BFD control packets, in milliseconds. It is a multiple of 100. It is in the range of 200 to 1000 and defaults to 400.

Description

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

The minimum interval for transmitting BFD control packets through an interface ensures BFD control packets are not transmitted faster than the device can deal with. The actual interval for transmitting BFD control packets at the local device 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 device.

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

By default, the minimum BFD transmit interval is 400 milliseconds.

Examples

# Configure the minimum interval for transmitting BFD control packets on VLAN-interface 1 as 300 milliseconds.

<Sysname> system-view

[Sysname] interface vlan-interface 1

[Sysname-Vlan-interface 1] bfd min-transmit-interval 300

1.1.7  bfd session init-mode

Syntax

bfd session init-mode{ active | passive }

undo bfd session init-mode

View

System view

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 device.

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

Use the undo bfd session init-mode command to restore the default. By default, BFD sessions are established in the active mode.

Examples

# Configure the session establishment mode as passive.

<Sysname> system-view

[Sysname] bfd session init-mode passive

1.1.8  display bfd interface

Syntax

display bfd interface [ verbose ]

View

Any view

Parameters

verbose: Displays detailed interface information.

Description

Use the display bfd interface command 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-interface1        Session Num: 1

Min Trans Inter: 400ms               Min Recv Inter: 400ms

     DetectMult: 5              Min Echo Recv Inter: 400ms

      Auth mode: Simple

# Display detailed information about BFD-enabled interfaces.

<Sysname> display bfd interface verbose

 

 Total Interface Num: 1

 

      Interface: Vlan-interface1        Session Num: 1

Min Trans Inter: 400ms               Min Recv Inter: 400ms

     DetectMult: 5              Min Echo Recv Inter: 400ms

      Auth mode: Simple

 LD/RD         SourceAddr      DestAddr        ConnType  State     Mode

 1             192.168.0.136   192.168.0.138   Direct    Up        Echo

Table 1-1 Description on the fields of the display bfd interface command

Field	Description
Interface	Interface name
Session Num	Number of sessions established on the local interface
Min Trans Inter	Expected minimum transmit interval configured on the interface
Min Recv Inter	Expected minimum receive interval configured on the interface
DetectMult	Session detection multiplier
Min Echo Recv Inter	Minimum interval for receiving echo packets
Auth mode	Session authentication mode: simple, MD5, or SHA-1
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	Mode

 

1.1.9  display bfd paf

Syntax

display bfd paf

View

Any view

Parameters

None

Description

Use the display bfd paf command to display PAF configuration information.

Examples

# Display BFD PAF configuration information.

<Sysname> display bfd paf

                 BFD PAF Information:

 Control Packet Min-Transmit-Interval(ms): 200

 Control Packet Min-Receive-Interval(ms) : 200

 Echo Packet Min-Receive-Interval(ms)    : 200

 Max Session Number                      : 10

Table 1-2 Description on the fields of the display bfd paf command

Field	Description
Control Packet Min-Transmit-Interval(ms)	Minimum interval for transmitting control packets
Control Packet Min-Receive-Interval(ms)	Minimum interval for receiving control packets
Echo Packet Min-Receive-Interval(ms)	Minimum interval for receiving echo packets
Max Session Number	Supported maximum number of sessions

 

1.1.10  display bfd session

Syntax

display bfd session [ verbose ]

View

Any view

Parameters

verbose: Displays detailed session information.

slot slot-id: Displays the session information of the specified board/slot.

Description

Use the display bfd session command to display BFD session information. This command displays the following interface-related information: session local ID, session remote ID, source address, destination address, session state, length of time before session detection timer expires, and the name of the interface of the session.

Besides the information displayed by the display bfd session command (except the length of time before session detection timer expires), the display bfd session verbose command displays:

Minimum transmit interval, minimum receive interval, actual transmit interval, actual session detection timer, packets sent and received by the session, time when the session was established, last time when the session was down, last time when the session was up, authentication mode, connection type, registered protocol, and diagnostic information.

Examples

# Display information about all the BFD sessions.

<Sysname> display bfd session

 

 Total Session Num: 1            Init Mode: Active

 

 Session Working Under Echo Mode:

 

 LD            SourceAddr      DestAddr        State Holdtime Interface

 1             192.168.0.136   192.168.0.138   Up    1700ms   Vlan1

# Display detailed information about the sessions maintained by the device.

<Sysname> display bfd session verbose

 Total Session Num: 1            Init Mode: Active

 Session Working Under Echo Mode:

     Local Discr: 1

       Source IP: 192.168.0.136     Destination IP: 192.168.0.138

   Session State: Up                     Interface: Vlan-interface1

  Min Recv Inter: 400ms            Act Trans Inter: 400ms

Act Detect Inter: 2000ms                 Hold Time: 1700ms

    Recv Pkt Num: 1809                Send Pkt Num: 1809

    Connect Type: Direct            Establish Time: 05:28:42

  Last Down Time: 05:28:42            Last Up Time: 05:38:15

        Protocol: STATIC

       Diag Info: No Diagnostic  

Table 1-3 Description on the fields of the display bfd session command

Field	Description
LD/ Local Discr	Local ID of the session
SourceAddr/ Source IP	Source IP address of the session
DestAddr/ Destination IP	Destination IP address of the session
State/Session State	Session state
Holdtime/ Hold Time	Length of time before session detection timer expires
Interface	Name of the interface of the session
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
Connect Type	Connection type of the interface
Establish Time	Time when the session was established
Last Down Time	Time when the session last became down
Last Up Time	Time when the session was last brought up
Protocol	Registered protocol
Diag Info	Diagnostic information about the session

 

1.1.11  reset bfd session statistics

Syntax

reset bfd session statistics

View

User view

Parameters

None

Description

Use the reset bfd session statistics command to clear the BFD session statistics of the current protocol.

Examples

# Clear statistics about all the BFD sessions of the current protocol.

<Sysname> reset bfd session statistics

1.1.12  snmp-agent trap enable bfd

Syntax

snmp-agent trap enable bfd

undo snmp-agent trap enable bfd

Parameters

None

View

System view

Description

Use the snmp-agent trap enable bfd command to enable sending BFD traps.

Use the undo snmp-agent trap enable bfd command to disable sending BFD traps.

By default, sending BFD traps is enabled.

Examples

Currently, the switches do not support this command.

 

Chapter 2  GR Commands

2.1  GR Commands

This part involves no specific commands. For GR-related commands, refer to BGP Configuration Commands, OSPF Configuration Commands, and IS-IS Configuration Commands in IPv4 Routing.