display multicast-domain invalid-packet

Function

The display multicast-domain invalid-packet command displays the statistics about the received invalid MDT switch messages and details about these messages.

Format

display multicast-domain vpn-instance vpn-instance-name invalid-packet

display multicast-domain all-instance invalid-packet

display multicast-domain invalid-packet [ packet-number ] verbose

Parameters

Parameter	Description	Value
all-instance	Displays the statistics about the received invalid MDT switch messages in all VPN instances.	-
packet-number	Displays details about a specified number of recently received invalid MDT switch messages.	The value is an integer ranging from 1 to 100. By default, details about all the invalid MDT switch messages currently stored are displayed.
verbose	Displays details about invalid MDT switch messages.	-
vpn-instance vpn-instance-name	Displays the statistics about the received invalid MDT switch messages in a specified VPN instance. vpn-instance-name specifies the VPN instance name.	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.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
mvpn	read

Usage Guidelines

Usage Scenario

You can run the display multicast-domain invalid-packet command to view the statistics about the received invalid MDT switch messages and details about these messages for fault location and rectification.

If a shortest path tree (SPT) fails to be set up in a VPN instance on a multicast network, you can run the display multicast-domain invalid-packet command to check whether devices have received invalid MDT switch messages. If the command output contains statistics about invalid MDT switch messages, run the display multicast-domain invalid-packet verbose command to view details about these messages to locate the fault.

You can run the following related commands to view statistics about the received invalid MDT switch messages in a specified VPN instance and details about these messages:

Run the display multicast-domain vpn-instance invalid-packet command to view statistics about the received invalid MDT switch messages in a specified VPN instance.Run the display multicast-domain invalid-packet verbose command to view details about recently received invalid MDT switch messages.

Example

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

# Display details about the last received invalid MDT switch messages.

<HUAWEI> display multicast-domain invalid-packet 1 verbose
       Detailed information of invalid packets                                      
-----------------------------------------------------                           
Packet information (Index 1):                                                    
-----------------------------------------------------                           
Neighbor            :  1.1.1.1
Time                :  2011-8-9 10:50:08 UTC-08:00
Message Length      :  16
Invalid Type        :  Invalid Switch Group
0000: 01 00 10 00 64 64 64 64 e8 00 00 00 0a 00 00 00                                       
-----------------------------------------------------

# Display the statistics about the invalid MDT switch messages received by vpn1.

<HUAWEI> display multicast-domain vpn-instance vpn1 invalid-packet
             Statistics of invalid packets for vpn1:            
--------------------------------------------------------------------            
MDT Switch invalid packet:
Fault Length            : 0           Invalid Message Type    : 0
Invalid Multicast Source: 0           Invalid Multicast Group : 0
Invalid Switch Group    : 0                 
--------------------------------------------------------------------

**Table 1** Description of the **display multicast-domain invalid-packet** command output
Item	Description
Detailed information of invalid packets	Details about the invalid MDT switch message.
Packet information (Index 1)	Sequence number of the invalid MDT switch message (opposite to the order in which messages are received).
Neighbor	Interface that receives the invalid MDT switch message.
Time	Time when the invalid MDT switch message is received, in any of the following formats: YYYY-MM-DD HH:MM:SS. YYYY-MM-DD HH:MM:SS UTC±HH:MM DST. YYYY-MM-DD HH:MM:SS UTC±HH:MM. YYYY-MM-DD HH:MM:SS DST.
Message Length	Length of the invalid MDT switch message.
Invalid Message Type	Number of messages with invalid message types.
Invalid Multicast Source	Number of messages with invalid multicast source addresses.
Invalid Multicast Group	Number of messages with invalid multicast group addresses.
Invalid Switch Group	Number of messages with invalid switch group addresses.
Invalid Type	Type of the invalid MDT switch message.
0000: 01 00 10 00 64 64 64 64 e8 00 00 00 0a 00 00 00	Contents of the invalid MDT switch message.
Statistics of invalid packets for vpn1	VPN instance to which the invalid MDT switch messages belong.
MDT Switch invalid packet	Number of invalid MDT switch messages.
Fault Length	Number of messages with invalid lengths.