The display igmp invalid-packet command displays statistics about invalid IGMP messages received by a device as well as details about these messages.
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
| Parameter | Description | Value |
|---|---|---|
| vpn-instance vpn-instance-name | Displays statistics about invalid IGMP messages received in a specified VPN instance. vpn-instance-name specifies the VPN instance name. | The value is a string of case-sensitive characters. |
| 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 by a specified interface. interface-type interface-number specifies the interface type and interface number. | - |
| message-type | Displays statistics about invalid IGMP messages of a specific message 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 ranging from 1 to 100. By default, details about all invalid, currently stored IGMP messages are displayed. |
| verbose | Displays details about invalid IGMP messages. | - |
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 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, you need to run the display igmp invalid-packet [ packet-number ] verbose command to view details about invalid IGMP messages in order to locate faults.
You can run the following related commands to view information about specific invalid IGMP messages:
Run the display igmp [ vpn-instance vpn-instance-name | all-instance ] invalid-packet command to view statistics about invalid IGMP messages received in a specified VPN instance or in all VPN instances.
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, details about a maximum of 100 invalid IGMP messages can be displayed.
# Display statistics about invalid IGMP messages received by a device in the public network instance.
<sysname> 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
--------------------------------------------------------------------
Item |
Description |
|---|---|
Statistics of invalid packets for public net |
VPN instance in which statistics about invalid IGMP messages need to be displayed |
IGMP Query invalid packet |
Invalid IGMP Query messages |
Unwanted Source List |
Messages with unwanted source lists |
Zero Max Resp Code |
Messages whose Max Resp Code field is 0 |
Fault Length |
Messages with invalid lengths |
Invalid Multicast Group |
Messages with invalid multicast group addresses |
Bad Checksum |
Messages with checksum errors |
IGMP Report invalid packet |
Invalid IGMP Report messages |
Invalid Multicast Source |
Messages with invalid multicast source addresses |
Illegal Report Type |
Messages with the illegal Report message type |
IGMP Leave invalid packet |
Invalid IGMP Leave messages |
# Display details of one invalid recently received IGMP message in the public network instance.
<sysname> display igmp invalid-packet 1 verbose
Detailed information of invalid packets
-----------------------------------------------------
Packet information (Index 6):
-----------------------------------------------------
Interface : GigabitEthernet0/0/6
Time : 2010-6-9 11:03:51 UTC-08:00
Message Length : 24
Invalid Type : Invalid Multicast Group
0000: 16 3c 00 00 01 34 04 04
-----------------------------------------------------
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. For example, if the index of the last received message is 1, the index of the last but one message is 2, and so on. |
Interface |
Interface receiving the invalid IGMP message |
Time |
Time when the invalid IGMP message is received, in any of the following formats:
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 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 |