Help for MVS Stack Connection Detail
This help page explains the detail information for a selected connection.
Connection Details between
Shows the IP addresses and ports of the partner sockets for this connection.
Target Appl
The target VTAM application name.
LU Name
The VTAM LU name.
Log Mode
The VTAM logmode through which the application is connected through.
Last Activity
The number of 100ths of seconds since this entry was last used.
Connection Status
The current status of this connection. The values used to describe the connection status are obtained from RFC1213 (tcpConnState definition). Connection status can have one of the following values: closed(1), listen(2), synSent(3), synReceived(4), established(5), finWait1(6), finWait2(7), closeWait(8), lastAck(9), closing(10), timeWait(11), or deleteTCB(12).
Bytes In
The number of bytes received from IP for this connection.
Buffered In
The number of incoming bytes buffered.
Bytes Out
The number of bytes sent to IP for this connection.
Buffered Out
The number of outgoing bytes buffered.
Round Trip Time
The amount of time that has elapsed, measured in milliseconds, from when the last TCP segment was transmitted by the TCP Stack until the ACK was received.
Round Trip Variance
The round trip variance time.
Retransmissions
The number of re-transmissions.
Current Retransmissions
The number of current re-transmissions.
Duplicate Acks Received
The number of duplicate ACKs received for this connection.
TCB Address
The subtask ID represents the task that opened the socket and is updated again during bind processing. It is actually the TCB address.
Resource ID
The resource ID is the numeric identification of this resource.
Local Resource
Resource Name is the text identification of this resource. It represents the user who opened the socket and is updated again during the bind processing.
Max Send Segment Size
The maximum segment size you can send.
Max Receive Buffer Size
The maximum receive buffer size.
Optimal Max Segment Size
The optimal maximum segment size. The range of this value is from 0 to 65535.
Telnet Mode
This flag indicates the following Telnet modes:
reserved | |
TN3270 mode | |
TN3270E mode | |
line mode |
Slow Start Threshold
The slow start threshold value.
Congestion Window
The congestion window.
Send Window
The send window size.
Max Send Window
The maximum send window size that is seen.
Bits
The bits options that can be set for a MIB object. A 1 under a bit field denotes that the bit is set to on.
Socket Options
The following bits can be set for socket options:
Sockets SO_REUSEADDR option | |
SO_OOBINLINE option | |
SO_LINGER option | |
T_MSGDONTROUTE | |
No delay (Nagle off) option | |
SO_Keepalive option | |
Allow multiple binds to same port (pascal) | |
Reserved |
TCP Timers
The following bits can be set for the flag for TCP timer:
= currently timing round trip | |
Currently timing rexmt | |
Currently timing window probe | |
Dally timer currently set | |
Max Seg Lifetime timer set | |
Currently timing linger | |
Currently timing keep alive | |
reserve |
TCP Signals
The following bits can be set for the flag for TCP signals:
Signal urgent data | |
Signal normal data | |
Signal timing finwait2 | |
Signal timing connection | |
Reserved | |
Reserved | |
Reserved | |
Push data out |
TCP Select
TCP select flag byte for TCP select conditions. It is mapped as follows:
Select for read issued | |
Select for write | |
Select for exception | |
Active/passive open | |
Non blocking read | |
Blocked for writing | |
Reserved | |
Reserved |
Special TCP Protocol
This flag will hold special TCP protocol conditions:
Delay Acks requested on PORT/PORTRANGE | |
Delay Acks requested on GATEWAY | |
Use default round trip parms | |
Connection is one hop away | |
Optimal max segment size request on PORT/PORTRANGE | |
Reserved |
TCP Poll
This flag will indicate the following TCP poll conditions:
poll priority | |
Poll write priority | |
Poll write normal/out | |
Poll read priority | |
Poll read normal | |
Poll hang up | |
Poll error | |
Reserved |