display igmp invalid-packet

Function

The display igmp invalid-packet command displays statistics and details about invalid IGMP packets received by the switch.

Format

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

display igmp invalid-packet [ packet-number ] verbose

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Displays statistics about invalid IGMP messages received in a specified VPN instance.	The value must be an existing VPN instance name.
all-instance	Displays statistics about invalid IGMP messages received in all VPN instances.	-
interface interface-type interface-number	Displays statistics about invalid IGMP messages received on a specified interface. If this parameter is not specified, the command displays statistics about IGMP messages received on all interfaces.	-
message-type	Displays statistics about invalid IGMP messages of a specific type.	-
leave	Displays statistics about invalid Leave messages.	-
query	Displays statistics about invalid Query messages.	-
report	Displays statistics about invalid Report messages.	-
packet-number	Displays details about a specified number of invalid, recently received IGMP messages.	The value is an integer that ranges from 1 to 100. By default, details about all invalid, currently stored IGMP messages are displayed.
verbose	Displays details about invalid IGMP messages.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display igmp invalid-packet command to view statistics and details about invalid IGMP messages for fault location and rectification.

If IGMP entries fail to be generated on a multicast network, you can 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 [ packet-number ] verbose command to view details about invalid IGMP messages to locate faults.

You can run the following commands to view information about specific invalid IGMP messages:

Run the display igmp invalid-packet interface interface-type interface-number command to view statistics about invalid IGMP messages received by a specified interface.
Run the display igmp invalid-packet packet-number verbose command to view details about invalid, recently received IGMP messages. Currently, the command output can contain details about a maximum of 100 invalid IGMP messages.

Example

# Display statistics about invalid IGMP messages received by the switch.

<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	Statistics of invalid IGMP messages in public network.
IGMP Query invalid packet	Number of invalid IGMP Query 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 group addresses.
Bad Checksum	Number of messages with checksum errors.
IGMP Report invalid packet	Number of invalid IGMP Report messages.
Invalid Multicast Source	Number of messages with invalid multicast source addresses.
Illegal Report Type	Number of IGMP Report messages of invalid types.
IGMP Leave invalid packet	Number of invalid IGMP Leave messages.

# Display details of one invalid recently received IGMP message.

<HUAWEI> display igmp invalid-packet 1 verbose
       Detailed information of invalid packets
-----------------------------------------------------
Packet information (Index 6):
-----------------------------------------------------
Interface           :  Vlanif100
Time                :  2010-06-09 11:03:51 UTC-08:00
Message Length      :  24
Invalid Type        :  Invalid Multicast Group
0000: 16 3c 00 00 01 34 04 04
-----------------------------------------------------

**Table 2** Description of the **display igmp invalid-packet 1 verbose** command output
Item	Description
Detailed information of invalid packets	Details about the invalid IGMP message.
Packet information (Index 6)	Sequence number of the invalid IGMP message, which is numbered in the opposite order in which the message is received.
Interface	Interface receiving invalid IGMP messages.
Time	Time when the invalid IGMP 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 using the clock timezone command; DST indicates that the daylight saving time is configured using clock daylight-saving-time command.
Message Length	Length of the invalid IGMP message.
Invalid Type	Type of the invalid IGMP message.
0000: 16 3c 00 00 01 34 04 04	Contents of the invalid IGMP message.