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This section describes messages issued by the Transport Layer. These messages include T01TC000 through T01TC099.
Explanation A TCP packet arrived which was shorter than the minimum TCP header. A dump of the packet follows.
Recommended Action Examine the remote host for this session.
Explanation A TCP datagram arrived and the offset field was invalid.
| offset | Offset from the packet. |
| header | Header length. |
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host for this session.
Explanation A TCP datagram arrived and the checksum field was invalid.
| checksum | Checksum computer. |
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host for this session.
Explanation A TCP SYN packet arrived and too many connections were already pending for this port.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Increase the pending connection count for the application supporting this port.
Explanation A TCP SYN packet arrived and the connection was opened.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Explanation A TCP SYN packet arrived and the connection was rejected.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the application supporting this port.
Explanation A TCP SYN packet arrived and the connection was a duplicate of one in Time_Wait state.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Explanation A TCP RST packet arrived while trying to establish a connection, indicating the connection was refused by the remote server.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host supporting this port.
Explanation A TCP packet arrived which specified an ACK number greater than the send sequence number, indicating data was ACKed by the remote host before the data was sent.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host supporting this connection
Explanation A TCP packet arrived which specified an ACK number greater than the connection's send sequence number, indicating data was ACKed by the remote host before the data was sent.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host supporting this connection
Explanation A TCP packet arrived which contains invalid options. The options are dumped.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
| options | Options dumped. |
Recommended Action Examine the remote host supporting this connection.
Explanation An error was encountered in an inbound TCP datagram. The datagram is dumped following the message.
Recommended Action This diagnostic message is preceded by an error or warning message. Follow the action for that message.
Explanation A RAW datagram was sent for which a route could not be obtained.
| proto | Protocol. |
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the network for routing problems
Explanation A UDP datagram arrived and the checksum field was invalid.
| checksum | Checksum computed. |
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host for this session
Explanation A UDP datagram arrived and the length field was invalid.
| length | Length field received. |
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host for this session.
Explanation An error was encountered in an inbound UDP datagram. The datagram is dumped following the message.
Recommended Action This diagnostic message is preceded by an error or warning message. Follow the action for that message.
Explanation A UDP datagram was sent for which a route could not be obtained.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the network for routing problems.
Explanation The TCP connection was closed. This message may be followed by messages T01TC082S and T01TC083S, depending on your message logging configuration.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Explanation A TCP connection has been closed.
| num_rcvd | Number of packets received. |
| num_bytes | Number of data bytes received. |
| num_acks | Number of ACK packets received. |
| num_err_pkts | Number of packets discarded for errors. |
| dup_pkts | Number of duplicate packets. |
| dup_bytes | Number of duplicate bytes. |
Explanation A TCP connection has been closed.
| pkts_sent | Number of packets sent. |
| bytes_sent | Number of data bytes sent. |
| acks_disc | Number of Ack packets sent. |
| pkts_disc | Number of packets discarded for errors. |
| pkts_retran | Number of retransmitted packets. |
| bytes_retran | Number of retransmitted bytes. |
Explanation A UDP connection has been closed.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Explanation A RAW connection has been closed. proto is the protocol name.
Explanation A TCP datagram was sent for which a route could not be obtained.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the network for routing problems.
Explanation A TCP connection was reset.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the application supporting this port on the remote host
Explanation A TCP connection was to be probed with keepalive packets but an MBUF could not be allocated for a packet
Recommended Action Examine the application supporting this port on the remote host.
Explanation A TCP connection was probed with keepalive packets, and did not respond.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the application supporting this port on the remote host.
Explanation TCP was unable to establish a connection with the remote host in the specified time.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host to be sure the application is ready to accept connections.
Explanation A TCP connection was to be probed with persist packets, and the retransmit timer was still set.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Contact Customer Support.
Explanation TCP retransmitted data to a remote host, but the data was not acknowledged. The specified maximum number of retransmits has occurred. The connection is reset.
| localIP | Local IP address. |
| lport | Local port number. |
| remoteIP | Remote IP address. |
| rport | Remote port number. |
Recommended Action Examine the remote host to see if it is operational and that the application is still active.
Explanation A debugging record has been written for a TCP connection.
| time | Timestamp in units of 0.004096 seconds. |
| event | TCP event causing this record. |
| seq1 | TCP sequence number of the beginning of the packet. |
| seq2 | TCP sequence number of the end of the packet. |
| len | Length of the packet data. |
| ack | Acknowledgment number of the packet. |
| win | Window size of the packet. |
Explanation A debugging record has been written for a state change.
| old | Old TCP state. |
| new | New TCP state. |
Explanation A TCP debugging record has been written for receive information.
| seq | Timestamp in units of 1004096 seconds. |
| wind | TCP event causing this record. |
| lip | TCP sequence number of the beginning of the packet. |
| lport | TCP sequence number of the end of the packet. |
| rip | Length of the packet data. |
| rport | Acknowledgment number of the packet. |
Explanation A TCP debugging record has been written for Send information.
| suna | Unacknowledged send sequence number. |
| snxt | Next sequence number to be sent. |
| smax | Maximum sequence number ever sent. |
| urg | Current Send Urgent sequence number. |
Explanation A TCP debugging record has been written for Send Window information
| windu | Window update sequence number. |
| winda | Window update acknowledgment number. |
| wind | Send window size. |
| urg | Current Receive Urgent sequence number. |
Explanation A debugging record has been written for timer information.
| rtime | Retransmit timer value. |
| count | Current retransmit counter. |
| keeptime | Keepalive timer value. |
| ptime | Persist timer value. |
| tw | Time Wait timer value. |
Explanation A debugging record has been written for timer information.
| dtime | Delay ack timer value. |
| ltime | Linger timer value. |
| free | Free timer value. |
Explanation A debugging record has been written for round trip information.
| rrt | Round trip time value. |
| srtt | Scaled round trip time. |
| var | Round trip timer variation. |
| cur | Current retransmit timer value. |
| seq | Round trip sequence number. |
Explanation A debugging record has been written for flag information. flags indicates the flagbits that were on in the TCP header.
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