display bfd bit-error-detection session

Function

The display bfd bit-error-detection session command displays information about BFD sessions for bit error detection.

Format

display bfd bit-error-detection session all

display bfd bit-error-detection session tunnel { interface { interface-name | interface-type interface-num } [ backup ] | ingress-lsr-id ingress-lsr-id tunnel-id tunnel-id lsp-id lsp-id }

display bfd bit-error-detection session section interface { interface-name | interface-type interface-num }

display bfd bit-error-detection session peer-ip peer-ip interface { interface-name | interface-type interface-num }

Parameters

Parameter	Description	Value
tunnel	Displays information about BFD sessions for tunnel bit error detection.	-
interface interface-type interface-num	Displays information about the BFD session used to detect bit errors on an interface with the specified type and number.	-
interface-type	Displays information about the BFD session used to detect bit errors on an tunnel with the specified type.	-
interface-num	Displays information about the BFD session used to detect bit errors on an tunnel with the specified number.	-
backup	Displays information about BFD sessions used to detect the bit errors of backup LSPs of tunnels.	-
ingress-lsr-id ingress-lsr-id	Displays information about BFD sessions used to detect the bit errors of tunnels with the specified ingress LSR ID.	The value is an integer ranging from 0 to 4294967295.
tunnel-id tunnel-id	Displays information about BFD sessions used to detect the bit errors of tunnels with the specified tunnel ID.	The value is an integer ranging from 0 to 4294967295.
lsp-id lsp-id	Displays information about BFD sessions used to detect the bit errors of LSPs with the specified LSP ID.	The value is an integer ranging from 0 to 4294967295.
section	Displays information about BFD sessions for section bit error detection.	-
peer-ip peer-ip	Displays information about BFD sessions used to detect the bit errors with the specified peer IP address..	The value is in dotted decimal notation.
all	Displays information about all BFD sessions for bit error detection.	-

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
bfd	read

Usage Guidelines

Usage Scenario

The display bfd bit-error-detection session command allows you to view information about BFD sessions for bit error detection. If a large number of BFD sessions for bit error detection exist, you can specify certain parameters to view only information about BFD sessions used to detect the bit errors of specific interfaces or LSPs.

If BFD sessions for bit error detection fail to be established, no information is displayed after you run this command.

Example

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

# Display information about all BFD sessions for bit error detection.

<HUAWEI> display bfd bit-error-detection session all
--------------------------------------------------------------------------------
BFD Bit Error Information:
--------------------------------------------------------------------------------
Session Type            : PE
FSM Board Id            : 9 
Fault Type              : Remote PE Fault
Min Tx Interval (ms)    : 1000
Max Tx Interval (ms)    : 30000
Actual Tx Interval (ms) : 30000
Detect Multi            : 3
Source IP Address       : 1.1.1.1
Destination IP Address  : 10.0.0.1
Destination Port        : 3784
TOS-EXP                 : 7
--------------------------------------------------------------------------------
LSP Information:
--------------------------------------------------------------------------------
Ingress LSR ID          : 1.1.1.1
Tunnel ID               : 100         
LSP ID                  : 3
Tunnel-Interface        : Tunnel11
In-Interface            : GigabitEthernet0/1/1 
Out-Interface           : GigabitEthernet0/1/1
LSP token               : 0x3
LSP Type                : Primary
--------------------------------------------------------------------------------
                
--------------------------------------------------------------------------------
BFD Bit Error Information:
--------------------------------------------------------------------------------
Session Type            : PE
FSM Board Id            : 9 
Fault Type              : -
Min Tx Interval (ms)    : 1000
Max Tx Interval (ms)    : 30000
Actual Tx Interval (ms) : 30000
Detect Multi            : 3
Source IP Address       : 1.1.1.1
Destination IP Address  : 10.20.0.1
Destination Port        : 3784
TOS-EXP                 : 7
--------------------------------------------------------------------------------
LSP Information:
--------------------------------------------------------------------------------
Ingress LSR ID          : 1.1.1.1
Tunnel ID               : 100         
LSP ID                  : 4
Tunnel-Interface        : Tunnel11
In-Interface            : GigabitEthernet0/1/2 
Out-Interface           : GigabitEthernet0/1/2
LSP token               : 0x4
LSP Type                : Backup
--------------------------------------------------------------------------------
                
     Total Session Number : 2

# Display information about BFD sessions that specifies the peer IP address used to detect bit errors.

<HUAWEI> display bfd bit-error-detection session tunnel interface Tunnel 11
--------------------------------------------------------------------------------
BFD Bit Error Information:
--------------------------------------------------------------------------------
Session Type            : PE
FSM Board Id            : 9 
Fault Type              : Remote PE Fault
Min Tx Interval (ms)    : 1000
Max Tx Interval (ms)    : 30000
Actual Tx Interval (ms) : 30000
Detect Multi            : 3
Source IP Address       : 1.1.1.1
Destination IP Address  : 10.0.0.1
Destination Port        : 3784
TOS-EXP                 : 7
--------------------------------------------------------------------------------
LSP Information:
--------------------------------------------------------------------------------
Ingress LSR ID          : 1.1.1.1
Tunnel ID               : 100         
LSP ID                  : 3
Tunnel-Interface        : Tunnel11
In-Interface            : GigabitEthernet0/1/1 
Out-Interface           : GigabitEthernet0/1/1
LSP token               : 0x3
LSP Type                : Primary
--------------------------------------------------------------------------------

# Display information about BFD sessions used to detect section bit errors.

<HUAWEI> display bfd bit-error-detection session section interface GigabitEthernet 0/1/0
--------------------------------------------------------------------------------
BFD Bit Error Information:
--------------------------------------------------------------------------------
Session Type             : Section
FSM Board Id             : 1
Fault Type               : Local Section Fault
Min Tx Interval (ms)     : 1000
Max Tx Interval (ms)     : 30000
Actual Tx Interval (ms)  : 30000
Detect Multi             : 3
Destination IP Address   : 10.0.0.184
Destination Port         : 3784
TOS-EXP                  : 7
--------------------------------------------------------------------------------
Section Information:
--------------------------------------------------------------------------------
Interface                : GigabitEthernet0/1/0
--------------------------------------------------------------------------------

# Display information about BFD sessions used to detect section bit errors.

<HUAWEI> display bfd bit-error-detection session peer-ip 2.2.2.2 interface GigabitEthernet 0/1/0
--------------------------------------------------------------------------------
BFD Bit Error Information:
--------------------------------------------------------------------------------
Session Type             : IP Peer
FSM Board Id             : 1
Fault Type               : Local Interface Fault
Min Tx Interval (ms)     : 1000
Max Tx Interval (ms)     : 30000
Actual Tx Interval (ms)  : 30000
Detect Multi             : 3
Destination Port         : 3784
TOS-EXP                  : 7
Local BER                : 5e-2
Remote BER               : 0e-0
--------------------------------------------------------------------------------
IP Peer Information:
--------------------------------------------------------------------------------
Interface                : GigabitEthernet0/1/0
Source IP Address        : 1.1.1.1
Destination IP Address   : 2.2.2.2
Vpn Instance Name        : -
--------------------------------------------------------------------------------

**Table 1** Description of the **display bfd bit-error-detection session** command output
Item	Description
BFD Bit Error Information	Information about BFD sessions for bit error detection.
Session Type	BFD session type.
FSM Board Id	Main control board number of the finite state machine.
Fault Type	Fault type.
Remote BER	Remote bit error rate.
Min Tx Interval (ms)	Minimum interval at which BFD packets are sent, in milliseconds.
Max Tx Interval (ms)	Maximum interval at which BFD packets are sent, in milliseconds.
Actual Tx Interval (ms)	Actual interval at which BFD packets are sent, in milliseconds.
Detect Multi	Detection multiplier.
Source IP Address	Source IP address.
IP Peer Information	IP Peer Information.
Destination IP Address	Destination IP address.
Destination Port	Destination interface number.
TOS-EXP	Packet priority.
LSP Information	LSP information.
LSP ID	LSP ID.
LSP token	LSP token value.
LSP Type	LSP type.
Ingress LSR ID	Ingress LSR ID.
Tunnel ID	Tunnel ID.
Tunnel-Interface	Tunnel interface.
In-Interface	Inbound interface of an LSP.
Out-Interface	Outbound interface of an LSP.
Total Session Number	Total Session Number.
Section Information	Section information.
Local BER	Local bit error rate.
Interface	Interface that has encountered a bit error event.
Vpn Instance Name	VPN instance name.