display isis bfd

Function

The display isis bfd command displays information on BFD-capable interfaces and about BFD session.

The display isis ipv6 bfd command displays information about an interface on which IPv6 BFD for IS-IS is enabled and an IPv6 BFD session for IS-IS.

Format

display isis bfd [ process-id | { vpn-instance vpn-instance-name } ] session { all | { peer peer-addr } | interface { interface-name | interface-type interface-number } }

display isis { process-id | { vpn-instance vpn-instance-name } } bfd session { all | { peer peer-addr } | interface { interface-name | interface-type interface-number } }

display isis bfd [ process-id | { vpn-instance vpn-instance-name } ] interface

display isis process-id bfd interface

display isis ipv6 bfd [ process-id | { vpn-instance vpn-instance-name } ] session { all | { peer peer-addr } | interface { interface-name | interface-type interface-number } }

display isis ipv6 bfd [ process-id | { vpn-instance vpn-instance-name } ] interface

display isis { process-id | { vpn-instance vpn-instance-name } } ipv6 bfd session { all | { peer peer-addr } | interface { interface-name | interface-type interface-number } }

display isis process-id ipv6 bfd interface

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an IS-IS process.	The value is an integer ranging from 1 to 4294967295.
vpn-instance vpn-instance-name	Specifies the name of an IPv6 address family-enabled VPN instance.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string.
session	Displays information about BFD session.	-
all	Display information about BFD sessions for IS-IS on all interfaces.	-
peer peer-addr	Specifies the address of a neighbor.	The value is a string case-sensitive characters, spaces not supported.
interface	Displays information on BFD-capable interfaces.	-
interface interface-type interface-number	Display the BFD sessions for specified interface.	-

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
isis	read

Usage Guidelines

Usage Scenario

To view information about an BFD session for IS-IS, run the display isis bfd session command.

To view information about an IPv6 BFD session for IS-IS, run the display isis ipv6 bfd session command.

Example

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

# Display information about the IPv6 BFD session for IS-IS of the neighbor with a specified IPv6 address.

<HUAWEI> display isis ipv6 bfd 1 session peer 2001:DB8::1
IPv6 BFD session information for ISIS(1)
-----------------------------------------------------------------------------

Peer System ID : 0000.0000.0001        Type : L2
Interface : GE0/1/0           
IPv6 BFD State : up      TX : 10            RX : 10            Multiplier : 3     
LocDis : 16386      Local IPv6 Address: 2001:DB8::1
RemDis : 16386      Peer IPv6 Address : 2001:DB8::2
Diag : No diagnostic information

Total BFD session(s): 1

# Display information about the IPv6 BFD session for IS-IS.

<HUAWEI> display isis ipv6 bfd 1 session all
IPv6 BFD session information for ISIS(1)
-----------------------------------------------------------------------------
Peer System ID : 0000.0000.0001        Type : L2              
Interface : GE0/1/0           
IPv6 BFD State : up      TX : 10            RX : 10            Multiplier : 3
LocDis : 16386      Local IPv6 Address: 2001:DB8::1
RemDis : 16386      Peer IPv6 Address : 2001:DB8::2
Diag : No diagnostic information

Total BFD session(s): 1

# Display information about the IPv4 BFD session for IS-IS.

<HUAWEI> display isis bfd 1 session all

                      BFD session information for ISIS(1)
                      -----------------------------------
Peer System ID : 2222.2222.2222        Interface : GE0/1/0
TX : 10            BFD State : up      Peer IP Address : 10.1.1.2
RX : 10            LocDis : 16386      Local IP Address: 10.1.1.1
Multiplier : 3     RemDis : 16386      Type : L2
Diag : No diagnostic information
Total BFD session(s): 1

**Table 1** Description of the **display isis bfd** command output
Item	Description
IPv6 BFD State	IPv6 BFD status: Up: indicates that the IPv6 BFD session is successfully set up. Down: indicates that the IPv6 BFD session fails to be set up. Unknown: When BFD fails to go Up for the first time, whether the link is faulty is unknown.
BFD State	BFD status: Up: indicates that the BFD session is successfully set up. Down: indicates that the BFD session fails to be set up. Unknown: When BFD fails to go Up for the first time, whether the link is faulty is unknown.
Peer System ID	System ID of a neighbor.
Peer IPv6 Address	IPv6 address of the peer interface.
Peer IP Address	IPv4 address of the peer interface.
Type	Level of a neighbor: L1: Level-1. L2: Level-2. L1L2: Level-1-2.
Interface	Name of the local interface.
TX	Minimum interval at which BFD packets are sent to the neighbor.
RX	Minimum interval at which BFD packets are received from the neighbor.
Multiplier	Local detection multiplier.
LocDis	Local discriminator of the BFD session.
Local IPv6 Address	IPv6 address of the local interface.
Local IP Address	IPv4 address of the local interface.
RemDis	Remote discriminator of the BFD session.
Diag	Diagnostic information.
Total BFD session(s)	Total number of BFD sessions.