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Fit AP V200R010C00 Command Reference

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
display tcp ipv6 statistics

display tcp ipv6 statistics

Function

The display tcp ipv6 statistics command displays IPv6 TCP traffic statistics.

Format

display tcp ipv6 statistics

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

You can check the network connection status according to the following items in the command output:
  • Established connections: You can view information about "Established connections" to check whether the number of connections exceeds the upper limit, and then determine whether to continue deploying services such as BGP services or adjust the load.

  • Duplicate ACK packets: You can view information about "Duplicate ACK packets" to check whether the device is attacked by unknown ACK packets. If the device receives a large number of unknown ACK packets, the device may be attacked.

  • Out-of-order packets: You can view information about "Out-of-order packets" to check network performance. If the network is in poor condition, a lot of out-of-order packets are generated.

Precautions

  • The total number of packets received by a routing device includes the number of forwarded packets, number of packets delivered by the routing device to the upper layer, and number of discarded packets.

  • Before running this command to view IPv6 TCP statistics within a specified period, run the reset tcp ipv6 statistics command to clear existing statistics.

Example

# Display IPv6 TCP packet statistics.

<Huawei> display tcp ipv6 statistics
Received packets:                                                               
     total: 0                                                                   
     total(64bit high-capacity counter): 0                                      
     packets in sequence: 0 (0 bytes)                                           
     window probe packets: 0                                                    
     window update packets: 0                                                   
     checksum error: 0                                                          
     offset error: 0                                                            
     short error: 0                                                             
     duplicate packets: 0 (0 bytes)                                             
     partially duplicate packets: 0 (0 bytes)                                   
     out-of-order packets: 0 (0 bytes)                                          
     packets with data after window: 0 (0 bytes)                                
     packets after close: 0                                                     
     ACK packets: 0 (0 bytes)                                                   
     duplicate ACK packets: 0                                                   
     too much ACK packets: 0                                                    
     packets dropped due to MD5 authentication failure: 0                       
     packets dropped due to absence of MSO: 0                                   
     packets dropped due to presence of MSO: 0                                  
     packets received with MD5 Signature Option: 0                              
     packets dropped due to MAC authentication failure: 0                       
     packets dropped due to absence of active receive key: 0                    
     packets dropped due to invalid receive algorithm id: 0                     
     packets dropped due to absence of Enhanced Authentication Option: 0        
     packets received with Enhanced Authentication Option: 0                    
                                                                                
Sent packets:                                                                   
     total: 0                                                                   
     urgent packets: 0                                                          
     total(64bit high-capacity counter): 0                                      
     control packets: 0 (including 0 RST)                                       
     window probe packets: 0                                                    
     window update packets: 0                                                   
     data packets: 0 (0 bytes)                                                  
     data packets retransmitted: 0 (0 bytes)                                    
     ACK only packets: 0 (0 delayed)                                            
     packets sent with MD5 Signature Option: 0                                  
     packets sent with Enhanced Authentication Option: 0                        
     packets not sent due to absence of active send key: 0                      
                                                                                
Other Statistics:                                                               
     retransmitted timeout: 0                                                   
     connections dropped in retransmitted timeout: 0                            
     keepalive timeout: 0                                                       
     keepalive probe: 0                                                         
     keepalive timeout, so connections disconnected: 0                          
     initiated connections: 0                                                   
     accepted connections: 0                                                    
     established connections: 0                                                 
     closed connections: 0 (dropped: 0, initiated dropped: 0)                   
Table 6-59  Description of the display tcp ipv6 statistics command output

Item

Description

Received packets:

total: 0

Total number of received packets.

total(64bit high-capacity counter)

Total number of received or sent packets counted by the 64-bit high-capacity counter.

packets in sequence

Number of packets received in sequence.

window probe packets

Number of received window probe packets.

window update packets

Number of received window update packets.

checksum error

Number of received packets with invalid checksum.

offset error

Number of received packets with incorrect TCP header length.

short error

Number of received packets with total length shorter than the set value in the packet header.

duplicate packets

Number of received duplicate packets.

partially duplicate packets

Number of received partially duplicate packets.

out-of-order packets

Number of received out-of-order packets.

packets with data after window

Number of received packets exceeding the receive window.

packets after close

Number of packets received after the connection is closed.

ACK packets

Number of received ACK packets.

duplicate ACK packets

Number of received duplicate ACK packets.

too much ACK packets

Number of received ACK packets with too large ACK values.

packets dropped due to MD5 authentication failure

Number of packets discarded due to MD5 authentication failure.

packets dropped due to absence of MSO

Number of packets discarded due to absence of MD5 Signature Option.

packets dropped due to presence of MSO

Number of packets discarded due to presence of MD5 Signature Option.

packets received with MD5 Signature Option

Number of received packets with MD5 Signature Option.

packets dropped due to MAC authentication failure

Number of packets discarded due to MAC authentication failure.

packets dropped due to absence of active receive key

Number of packets discarded due to absence of active receive key.

packets dropped due to invalid receive algorithm id

Number of packets discarded due to invalid receive algorithm ID.

packets dropped due to absence of Enhanced Authentication Option

Number of packets discarded due to absence of Enhanced Authentication Option.

packets received with Enhanced Authentication Option

Number of received packets with Enhanced Authentication Option.

Sent packets:

total: 0

Total number of sent packets.

urgent packets

Number of sent packets with the urgent pointer.

control packets

Number of sent control packets.

window probe packets

Number of sent window probe packets.

window update packets

Number of sent window update packets.

data packets

Number of sent data packets.

data packets retransmitted

Number of retransmitted data packets.

ACK only packets

Number of sent ACK only packets.

packets sent with MD5 Signature Option

Number of sent packets with MD5 Signature Option.

packets sent with Enhanced Authentication Option

Number of packets sent with Enhanced Authentication Option

packets not sent due to absence of active send key

Number of packets not sent due to absence of active send key

Other Statistics:

Other statistics.

retransmitted timeout

Number of retransmission timeout packets.

connections dropped in retransmitted timeout

Number of disconnected connections during the retransmission timeout.

keepalive timeout

Number of Keepalive timeouts.

keepalive probe

Number of Keepalive probes.

keepalive timeout, so connections disconnected

Number of connections disconnected due to Keepalive timeout.

initiated connections

Number of initiated connections.

accepted connections

Number of accepted connections.

established connections

Number of established connections.

closed connections

Number of closed connections.

dropped

Number of disconnected connections.

initiated dropped

Number of initiated and disconnected connections.

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Updated: 2019-07-18

Document ID: EDOC1100064353

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