display multicast-domain invalid-packet

Function

The display multicast-domain invalid-packet command displays statistics about invalid MDT switch messages received by a device and details of these messages.

Format

display multicast-domain { vpn-instance vpn-instance-name | all-instance } invalid-packet

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

Parameters

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

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

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

If an SPT fails to be set up in a VPN instance on a multicast network, you can run the display multicast-domain invalid-packet command first to check whether devices have received invalid MDT switch messages. If the command output contains statistics about invalid MDT switch messages, you need to run the display multicast-domain invalid-packet [ packet-number ] verbose command to view details of invalid MDT switch messages to locate the fault.

Example

# Displays statistics about invalid MDT switch messages received in 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 vpn-instance vpn1 invalid-packet** command output
Item	Description
Statistics of invalid packets for vpn1	VPN instance in which statistics about MDT switch messages need to be displayed.
MDT Switch invalid packet	Invalid MDT switch messages.
Fault Length	Messages with invalid lengths.
Invalid Message Type	Messages with invalid message types.
Invalid Multicast Source	Messages with invalid multicast source addresses.
Invalid Multicast Group	Messages with invalid multicast group addresses.
Invalid Switch Group	Messages with invalid switch group addresses.

# Display details of one invalid MDT switch message recently received in the public network instance.

<HUAWEI> display multicast-domain invalid-packet 1 verbose
       Detailed information of invalid packets                                      
-----------------------------------------------------                           
Packet information (Index 1):                                                    
-----------------------------------------------------                           
Interface           :  10.44.44.44
Time                :  2010-6-9 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                                       
-----------------------------------------------------

**Table 2** Description of the **display multicast-domain invalid-packet 1 verbose** command output
Item	Description
Detailed information of invalid packets	Details of the invalid MDT switch message.
Packet information (Index 1)	Sequence number of the invalid MDT switch message (numbered in the opposite order that the message is received, for example, the index of the last received message is 1, the index of the last but one message is 2, and so on).
Interface	IP address of interface receiving 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 UTC±HH:MM indicates that a time zone is configured through the clock timezone command; DST indicates that the daylight saving time is configured through clock daylight-saving-time command.
Message Length	Length of the invalid MDT switch message.
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.