display tcp ipv6 statistics

Function

The display tcp ipv6 statistics command displays statistics about TCP IPv6 packets.

Format

display tcp ipv6 statistics

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display tcp ipv6 statistics command can be run to display statistics about TCP IPv6 packets.

Example

# Display statistics about the received and sent TCP IPv6 packets.

<sysname> display tcp ipv6 statistics
Received packets:
     Total: 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
                                                         
Sent packets:
     Total: 0
     urgent packets: 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)
                                                         
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 1** Description of the **display** **tcp ipv6 statistics** command output for received packets
Item	Description
Total	Total number of packets received
Packets in sequence	Packets received in sequence
Window probe packets	Number of window probe packets for closed window
Window update packets	Packets received to notify the window size update
Checksum error	Packets received with invalid checksum
Offset error	Packets with wrong TCP header length
Short error	Number of the short packets received means total length is actually shorter than set value in header
Duplicate packets	Number of duplicate packets
Partially duplicate packets	Number of partially duplicate packets received
Out-of-order packets	Number of out of order packets received
Packets with data after window	Number of packets received exceeding the receive window
Packets after close	Number of received packets after connection is closed
ACK packets	Total number of received ACK packets
Duplicate ACK packets	Number of received duplicate ACK packets
Too much ACK packets	Number of the received ACK packets with too large ACK values
Urgent packets	Number of the packets with urgent pointer sent
Control packets	Number of control packets sent
Window probe packets	Number of window probe packets sent
Window update packets	Number of the window update packets sent
Data packets	Number of data packets sent
Data packets retransmitted	Number of data packets retransmitted
ACK-only packets	Number of acknowledgement only packets sent
Retransmitted timeout	Number of packets whose retransmission times out
Connections dropped in retransmitted timeout	Number of connections dropped during the retransmission timeout
Keepalive timeout	Number of keep alive timeouts
Keepalive probe	Number of keep alive probes
Keepalive timeout, so connections disconnected	Number of connections disconnected due to the connection being idle for keeping alive probes with no response
Initiated connections	Number of the connections initiated
Accepted connections	Number of the accepted connections
Established connections	Number of established connections
Closed connections	Number of closed connections
Dropped	Number of dropped connections
Initiated dropped	Number of initiated and dropped connections