display bfd error packet

Function

The display bfd error packet command displays information about error packets received by a BFD session.

Format

display bfd error packet discriminator discr-value number

Parameters

Parameter	Description	Value
discriminator discr-value	Displays information about error packets received by a BFD session with a specified local discriminator.	An integer ranging from 1 to 16383
number	Specifies the number of error packets.	An integer ranging from 1 to 10

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

If you doubt that a BFD session is attacked by packets, you can run the display bfd error packet command to view information about error packets received by the BFD session.

Precautions

You need to specify the local discriminator of the BFD session and the number of error packets in the display bfd error packet command.

Example

# Display information about 2 error packets received by the BFD session with the local discriminator of 22.

<sysname> display bfd error packet discriminator 22 2

Number       : 1
Record time  : 2014/11/05 16:53:23:800
Error type   : Authentication failed
Error packet content:
 00 E0 FC 54 F6 B2 00 E0 FC 7D B3 AA 08 00 45 C0
 00 3E 33 ED 00 00 FF 11 7C F8 03 03 03 03 02 02
 02 02 02 86 02 86 00 2A 15 F5 00 01 00 1E 03 03
 03 03 00 00 01 00 00 14 00 00 05 1A 04 00 00 04

Number: 2
Record time   : 2014/11/05 16:54:23:300
Error type    : Incorrect version
Error packet content:
 00 E0 FC 54 F6 B2 00 E0 FC 7D B3 AA 08 00 45 C0
 00 3E 33 ED 00 00 FF 11 7C F8 03 03 03 03 02 02
 02 02 02 86 02 86 00 2A 15 F5 00 01 00 1E 03 03
 03 03 00 00 01 00 00 14 00 00 05 1A 04 00 00 04

**Table 1** Description of the **display bfd error packet** command output
Item	Description
Number	Number of an error packet
Record time	Time when an error packet was received
Error type	Error type
Error packet content	Contents of an error packet: Incorrect discriminator: indicates the incorrect discriminator. Incorrect destination port: indicates the incorrect destination port number. Incorrect TTL value: indicates the incorrect TTL. Incorrect packet length: indicates the incorrect packet length. Incorrect detect multiple value: indicates the incorrect detection multiplier. Incorrect authentication type: indicates the incorrect authentication type. Incorrect authentication length: indicates the incorrect authentication password length. Incorrect sequence number: indicates the incorrect sequence number. Inactive authentication key: indicates that the authentication key ID has not been activated. Authentication failed: indicates that a packet fails to be authenticated. Unknown error