display msdp invalid-packet

Function

The display msdp invalid-packet command displays statistics about invalid MSDP messages received by a device and details of these messages.

Format

display msdp [ vpn-instance vpn-instance-name | all-instance ] invalid-packet [ peer peer-address | message-type { keepalive | notification | sa-request | sa-response | source-active } ] ^*

display msdp invalid-packet [ packet-number ] verbose

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Displays statistics about invalid MSDP 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 MSDP messages received in all VPN instances.	-
peer peer-address	Displays statistics about invalid MSDP messages received from a specified peer. peer-address specifies an MSDP peer address.	The address is in dotted decimal notation.
message-type	Displays statistics about invalid MSDP messages of a specific type.	-
keepalive	Displays statistics about invalid Keepalive messages.	-
notification	Displays statistics about invalid Notification messages.	-
sa-request	Displays statistics about invalid Source-Active Request messages.	-
sa-response	Displays statistics about invalid Source-Active Response messages.	-
source-active	Displays statistics about invalid Source-Active messages.	-
packet-number	Displays details of a specified number of invalid MSDP messages recently received.	The value is an integer ranging from 1 to 100. By default, details of all invalid MSDP messages currently stored are displayed.
verbose	Displays details of invalid MSDP messages.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display msdp invalid-packet command to view statistics and details of invalid MSDP messages for fault location and rectification.

If MSDP peer relationships fail to be set up on a multicast network, you can run the display msdp invalid-packet command first to check whether devices have received invalid MSDP messages. If the command output contains statistics about invalid MSDP messages, run the display msdp invalid-packet [ packet-number ] verbose command to view details of invalid MSDP messages to locate the fault.

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

Run the display msdp [ vpn-instance vpn-instance-name | all-instance ] invalid-packet command to view statistics about invalid MSDP messages received in a specified VPN instance or in all VPN instances.
Run the display msdp invalid-packet peer peer-address command to view statistics about invalid MSDP messages received from a specified peer.
Run the display msdp invalid-packet packet-number verbose command to view details of invalid MSDP messages recently received. Currently, details of a maximum of 100 invalid MSDP messages can be displayed.

Example

# Display statistics about invalid MSDP messages received by a device in the public network instance.

<sysname> display msdp invalid-packet peer 1.1.1.1

             Statistics of invalid packets for public net:                      
--------------------------------------------------------------------            
MSDP SA invalid packet:
Fault Length            : 0           Bad Length-x            : 0
Bad Sprefix             : 0           Invalid Multicast Group : 0
Invalid Multicast Source: 0           Bad Encap Data          : 0
Illegal RP Addr         : 0           RP Loop                 : 0

MSDP SA Response invalid packet:
Fault Length            : 0           Bad Length-x            : 0
Bad Sprefix             : 0           Invalid Multicast Group : 0
Invalid Multicast Source: 0           Illegal RP Addr         : 0
RP Loop                 : 0

MSDP SA Request invalid packet:
Fault Length            : 0           Invalid Multicast Group : 0

MSDP Keep Alive invalid packet:
Fault Length            : 0

MSDP Notification invalid packet:
Fault Length            : 0                                                                           
--------------------------------------------------------------------

**Table 1** Description of the display msdp invalid-packet command output
Item	Description
Statistics of invalid packets for public net	VPN instance in which statistics about invalid MSDP messages need to be displayed
MSDP SA invalid packet	Invalid Source Active (SA) messages
Fault Length	Messages with invalid lengths
Bad Length-x	Messages with invalid Length-x fields
Bad Sprefix	Messages with invalid Sprefix fields
Invalid Multicast Group	Messages with invalid multicast group addresses
Invalid Multicast Source	Messages with invalid multicast source addresses
Bad Encap Data	Messages with invalid data encapsulated
Illegal RP Addr	Messages with illegal RP addresses
RP Loop	Messages whose RP addresses are local addresses
MSDP SA Response invalid packet	Invalid SA Response messages
MSDP SA Request invalid packet	Invalid SA Request messages
MSDP Keep Alive invalid packet	Invalid Keepalive messages
MSDP Notification invalid packet	Invalid Notification messages

# Display details of a specific invalid MSDP message recently received in the public network instance.

<sysname> display msdp invalid-packet 1 verbose
       Detailed information of invalid packets                                       
-----------------------------------------------------                           
Packet information (Index 1):                                                   
-----------------------------------------------------                           
Peer                :  10.2.2.2
Time                :  2010-6-9 11:25:46 UTC-08:00                              
Message Length      :  22                                                       
Invalid Type        :  Invalid Addr List                                        
0000: 00 01 00 02 00 69 00 13 00 04 00 00 00 64 00 02                           
0010: 00 04 81 f4 09 c4                                                         
-----------------------------------------------------

**Table 2** Description of the display msdp invalid-packet verbose command output
Item	Description
Detailed information of invalid packets	Details of the invalid MSDP message
Packet information (Index 1)	Sequence number of the invalid MSDP 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)
Peer	IP address of the peer that sends the invalid MSDP message
Time	Time when the invalid MSDP 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 MSDP message
Invalid Type	Type of the invalid MSDP message
0000: 00 01 00 02 00 69 00 13 00 04 00 00 00 64 00 02 0010: 00 04 81 f4 09 c4	Contents of the invalid MSDP message