display igmp invalid-packet

Function

The display igmp invalid-packet command displays statistics about received invalid IGMP messages and details about these messages.

Format

display igmp { vpn-instance vpn-instance-name | all-instance } invalid-packet [ interface { interface-type interface-number | interface-name } | message-type { query | report | leave } ] ^*

display igmp invalid-packet [ interface { interface-type interface-number | interface-name } | message-type { query | report | leave } ] ^*

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Displays statistics about received invalid IGMP messages in a specified VPN instance. vpn-instance-name specifies the name of a VPN instance.	The value is a string of case-sensitive characters.
all-instance	Displays statistics about received invalid IGMP messages in all instances.	-
interface interface-type	Displays statistics about invalid IGMP messages received by a specified interface type.	-
interface-number	Displays statistics about invalid IGMP messages received by a specified interface number.	-
interface-name	Specifies the name of an interface.	-
message-type	Displays statistics about received invalid IGMP messages of a specific message type.	-
query	Displays statistics about received invalid Query messages.	-
report	Displays statistics about received invalid Report messages.	-
leave	Displays statistics about received invalid Leave messages.	-

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
igmp	read

Usage Guidelines

Usage Scenario

To view statistics and details about received invalid IGMP messages, run the display igmp invalid-packet command. The command output helps you locate and rectify IGMP faults.

If IGMP entries fail to be generated on a multicast network, you can first run the display igmp invalid-packet command to check whether devices have received invalid IGMP messages. If the command output contains statistics about invalid IGMP messages, run the display igmp invalid-packet verbose command to view details about invalid IGMP messages to locate faults.

Before using the display igmp invalid-packet command, note the following:

If neither vpn-instance vpn-instance-name nor all-instance is specified, the command displays statistics about received invalid IGMP messages in the public network instance.
If interface is specified, the command displays statistics about invalid IGMP messages received by the specified interface.

Example

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

# Display statistics about received invalid IGMP messages in the public network instance.

<HUAWEI> display igmp invalid-packet

           Statistics of invalid packets for public net:
--------------------------------------------------------------------
IGMP Query invalid packet:
Unwanted Source List    : 1000        Zero Max Resp Code      : 0
Fault Length            : 1000        Invalid Multicast Group : 0
Bad Checksum            : 0

IGMP Report invalid packet:
Fault Length            : 0           Invalid Multicast Group : 0
Invalid Multicast Source: 0           Bad Checksum            : 0
Illegal Report Type     : 0

IGMP Leave invalid packet:
Invalid Multicast Group : 0           Bad Checksum            : 0
--------------------------------------------------------------------

**Table 1** Description of the **display igmp invalid-packet** command output
Item	Description
Statistics of invalid packets for public net	Instance in which statistics about invalid IGMP messages are displayed.
IGMP Query invalid packet	Statistics about invalid IGMP Query messages.
IGMP Report invalid packet	Statistics about invalid IGMP Report messages.
IGMP Leave invalid packet	Statistics about invalid IGMP Leave messages.
Unwanted Source List	Number of messages with unwanted source lists.
Zero Max Resp Code	Number of messages whose Max Resp Code field is 0.
Fault Length	Number of messages with invalid lengths.
Invalid Multicast Group	Number of messages with invalid multicast group addresses.
Invalid Multicast Source	Number of messages with invalid multicast source addresses.
Bad Checksum	Number of messages with checksum errors.
Illegal Report Type	Number of messages with the illegal Report message type.