IST1968I
ARB INFORMATION:

Explanation

VTAM® issues this message as part of a group of messages in response to a DISPLAY ID command for a PU type 2.1 representing a Rapid Transport Protocol (RTP) route when HPRDIAG=YES is specified. This message is the first in a group of messages and the full description of the message group follows. 
 IST1968I      ARB INFORMATION:
[IST1844I      ARB MODE = mode] 
[IST1697I      RTP PACING ALGORITHM = ARB RESPONSIVE MODE]  
[IST2267I      RTP PACING ALGORITHM = ARB PROGRESSIVE MODE]
[IST2395I      RTP PACING ALGORITHM = ARB BASE MODE]
 IST1477I      ALLOWED DATA FLOW RATE = allowed units  
 IST1516I      INITIAL DATA FLOW RATE = initial units  
 IST1841I      ACTUAL DATA FLOW RATE = actual units  
 IST1969I      MAXIMUM ACTUAL DATA FLOW RATE = max_rate units 
 IST1862I      ARB MAXIMUM SEND RATE = maximum units  
[IST1845I      BOUNDARY DIVIDING REGIONS lower AND upper = boundary  MILLISECONDS]
⋮
[IST1846I      Type RECEIVER THRESHOLD = threshold MICROSECONDS]
⋮
 IST1970I      RATE REDUCTIONS DUE TO RETRANSMISSIONS = count   
 IST924I       ---------------------------------------------------------  
 IST1971I      TIMER INFORMATION:                                                    
 IST1852I      LIVENESS TIMER = liveness SECONDS  
 IST1851I      SMOOTHED ROUND TRIP TIME = smoothed_time MILLISECONDS   
 IST1972I      SHORT REQUEST TIMER = timer MILLISECONDS                    
 IST2229I      REFIFO TIMER = refifo MILLISECONDS 

 IST924I       ---------------------------------------------------------  
 IST1973I      OUTBOUND TRANSMISSION INFORMATION: 
 IST1974I      NUMBER OF NLPS SENT = count ( estimate )   
 IST1975I      TOTAL BYTES SENT = count ( estimate )         
 IST1849I      LARGEST NLP SENT = size BYTES   
 IST1980I      SEQUENCE NUMBER = sequence_num (X'hex_value')  
 IST1842I      NUMBER OF NLPS RETRANSMITTED = retransmitted   
 IST2249I      NLP RETRANSMIT RATE = percentage 
[IST2236I      LAST NLP RETRANSMITTED ON date AT time]
 IST1976I      BYTES RETRANSMITTED = count ( estimate )   
 IST1478I      NUMBER OF UNACKNOWLEDGED BUFFERS = buffers  
 IST1958I      NUMBER OF ORPHANED BUFFERS = orphaned_NLP_count 
 IST1843I      NUMBER OF NLPS ON WAITING-TO-SEND QUEUE = waitsend  
 IST1847I      NUMBER OF NLPS ON WAITING-FOR-ACKNOWLEDGEMENT QUEUE = waitack   
 IST2268I      NUMBER OF BYTES ON WAITING-FOR-ACK QUEUE = waitforackbytes
 IST1977I      MAXIMUM NUMBER OF NLPS ON WAITING-FOR-ACK QUEUE = count   
 IST2269I      MAXIMUM NUMBER OF BYTES ON WAITING-FOR-ACK QUEUE = maxwaitforack
 IST1978I      WAITING-FOR-ACK QUEUE MAX REACHED ON date AT time                   
 IST2085I      NUMBER OF NLPS ON OUTBOUND WORK QUEUE = num_nlps  
 IST2086I      MAXIMUM NUMBER OF NLPS ON OUTBOUND WORK QUEUE = max_num_nlps 
 IST2087I      OUTBOUND WORK QUEUE MAX REACHED ON date AT time 
 IST1511I      MAXIMUM NETWORK LAYER PACKET SIZE = size BYTES  
 IST924I       ---------------------------------------------------------  
 IST1979I      INBOUND TRANSMISSION INFORMATION:  
 IST2059I      NUMBER OF NLPS RECEIVED = count ( estimate )   
 IST1981I      TOTAL BYTES RECEIVED = count ( estimate ) 
 IST1850I      LARGEST NLP RECEIVED = size BYTES   
 IST1980I      SEQUENCE NUMBER = sequence_num (X'hex_value') 
 IST1853I      NUMBER OF NLPS ON OUT-OF-SEQUENCE QUEUE = outofsequence  
 IST2230I      MAXIMUM NUMBER OF NLPS ON OUT-OF-SEQUENCE QUEUE = maxoutofsequence 

 IST1854I      NUMBER OF NLPS ON INBOUND SEGMENTS QUEUE = inboundsegs   
 IST1982I      NUMBER OF NLPS ON INBOUND WORK QUEUE = count   
 IST1983I      MAXIMUM NUMBER OF NLPS ON INBOUND WORK QUEUE = count   
 IST924I       ---------------------------------------------------------  
 IST1984I      PATH SWITCH INFORMATION:      
 IST2271I      PATH SWITCH DELAY = ps_delay_value
[IST2272I      PATH SWITCH DELAYED UNTIL date AT time]
[IST1856I      LAST PATHSWITCH OCCURRENCE WAS ON date AT time] 
[IST1817I      PATH SWITCH REASON: RTP CONNECTION UNAVAILABLE] 
[IST1818I      PATH SWITCH REASON: SHORT REQUEST RETRY LIMIT EXHAUSTED] 
[IST1819I      PATH SWITCH REASON: TG INOP] 
[IST1820I      PATH SWITCH REASON: MODIFY RTP COMMAND ISSUED] 
[IST1821I      PATH SWITCH REASON: AUTO PATH SWITCH FOR PSRETRY] 
[IST1937I      PATH SWITCH REASON: INITIATED BY REMOTE PARTNER] 
[IST1822I      PATH SWITCH REASON: UNKNOWN]  
[IST2239I      PATH SWITCH REASON: MNPS ENDPOINT RECOVERY]
[IST2335I      PATH SWITCH REASON: XMIT STALL RECOVERY]
 IST1985I      PATH SWITCHES INITIATED FROM REMOTE RTP = count   
 IST1986I      PATH SWITCHES INITIATED FROM LOCAL RTP = count    
 IST1987I      PATH SWITCHES DUE TO LOCAL FAILURE = count   
 IST1988I      PATH SWITCHES DUE TO LOCAL PSRETRY = count                 
 IST924I       ---------------------------------------------------------  
 IST1857I      BACKPRESSURE REASON COUNTS:  
 IST1858I      PATHSWITCH  SEND QUEUE MAX  STORAGE FAILURE  STALLED PIPE  
 IST2205I      ----------  --------------  ---------------  ------------ 
 IST1859I      pathswitch    sendqmax         storefail      stalledpipe  
 IST2211I      ACK QUEUE MAX 
 IST2205I      -------------  
 IST2212I      ackqmax  
[IST2213I      LAST BACKPRESSURE APPLIED ON date AT time]
[IST2214I      BACKPRESSURE REASON: PATHSWITCH] 
[IST2215I      BACKPRESSURE REASON: SEND QUEUE MAXIMUM REACHED] 
[IST2216I      BACKPRESSURE REASON: STORAGE FAILURE] 
[IST2217I      BACKPRESSURE REASON: STALLED PIPE] 
[IST2218I      BACKPRESSURE REASON: WAITING-FOR-ACK QUEUE MAXIMUM REACHED]

 IST924I       --------------------------------------------------------- 
 IST2250I      ALL DIAGNOSTIC COUNTERS CLEARED ON date AT time 
[IST2248I      ALL DIAGNOSTIC COUNTERS CLEARED FOR number RTP PIPES]
IST924I
  • This message is used as a separator message.
IST1477I
  • allowed is the allowed rate at which data can be sent over the RTP connection at the time this message is displayed.
  • units is the unit of measure for the rate and is displayed in bits, kilobits, megabits, or gigabits per second (BITS/SEC, KBITS/SEC, MBITS/SEC, or GBITS/SEC).
IST1478I
  • buffers is the number of I/O buffers containing outbound data that have been sent to the partner without an acknowledgment since the HPR PU was activated.
IST1511I
  • size is the maximum size of a network layer packet (NLP) that can be sent over this Rapid Transfer Protocol (RTP) connection in bytes.
IST1516I
  • initial is the initial data flow rate for this Rapid Transfer Protocol (RTP) connection.
  • units is the unit of measure for the rate and is displayed in bits, kilobits, megabits, or gigabits per second (BITS/SEC, KBITS/SEC, MBITS/SEC, or GBITS/SEC).
IST1697I
  • This message indicates that the responsive-mode adaptive rate-based (ARB) pacing algorithm is being used.
IST1817I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a rapid transfer protocol (RTP) and the last path switch took place because the underlying physical connection or the RTP itself was not in a state suitable for RTP traffic.
IST1818I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a rapid transfer protocol (RTP) and the last path switch took place because the RTP partner was not responding to status requests initiated by this RTP endpoint. Each time a status request is sent to the partner a short request timer is set to time the transaction. If the short request timer expires and no response is received from the partner, the process is repeated. This process will repeat until the retry limit for the RTP pipe is exhausted. When the retry limit is met, a path switch is requested to try to restore communications with the RTP partner.
  • The short request timer is an internally calculated value. It is based on the observed response time of the RTP pipe. This timer cannot be specified externally.
IST1819I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the last path switch took place because the physical connection that the RTP pipe traversed suffered an INOP condition.
IST1820I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the last path switch took place because an operator issued a MODIFY RTP command to force an RTP path switch.
IST1821I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the last path switch took place because the PSRETRY start option value forced an automatic path switch for this RTP connection.
IST1822I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the reason for the last RTP path switch is unavailable.
IST1841I
  • This message shows the actual data flow rate for this Rapid Transfer Protocol (RTP). It should be compared with the allowed data rate displayed by message IST1477I, and the initial data rate displayed by IST1516I.
  • actual is the actual rate at which data is being sent over the RTP connection at the time this message is displayed.
  • units is the unit of measure for the rate and is displayed in bits, kilobits, megabits, or gigabits per second (BITS/SEC, KBITS/SEC, MBITS/SEC, or GBITS/SEC).
  • The data flow rate is updated approximately every second while data is flowing.
IST1842I
  • This message is issued if HPRDIAG=YES is specified.
  • retransmitted is the number of network layer packets (NLPs) that have been retransmitted for this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
IST1843I
  • This message is issued if HPRDIAG=YES is specified.
  • waitsend is the number of network layer packets (NLPs) currently in the waiting-to-send queue.
IST1844I
  • This message is issued if HPRDIAG=YES is specified.
  • mode is the current Adaptive Rate-Based (ARB) pacing mode. The value is one of the following:
    Green
    Data transmission is being performed without significant network congestion.
    Yellow
    Data transmission is being slowed down because network congestion has been detected.
    Red
    Data transmission is being affected by severe network congestion which might result in packet loss.
IST1845I
  • This message is issued if HPRDIAG=YES is specified and the base mode Adaptive Rate-Based (ARB) pacing algorithm is in use for this Rapid Transfer Protocol (RTP). It is issued three times to display each of the three Delay Change Sum (DCS) boundaries dividing the four ARB regions.
  • lower is a number (1, 2, or 3) representing the ARB region below the boundary.
  • upper is a number (2, 3, or 4) representing the ARB region above the boundary.
  • boundary is the DCS boundary in milliseconds dividing the two ARB regions designated by lower and upper.
IST1846I
  • This message is issued if HPRDIAG=YES is specified and the responsive mode Adaptive Rate-Based (ARB) pacing algorithm is in use for this Rapid Transfer Protocol (RTP). It is issued three times to show each of the receiver thresholds identified by the message: CURRENT, MAXIMUM and MINIMUM.
  • type is the receiver threshold type. The value is one of the following:
    CURRENT
    Amount of accumulated network delay permitted before a slowdown message is returned to the connection partner.
    MAXIMUM
    Maximum amount of accumulated network delay specifically allowed for this link's network capacity.
    MINIMUM
    Minimum amount of accumulated network delay specifically allowed for this link's network capacity.
  • threshold is the receiver threshold value, in microseconds.
IST1847I
  • This message is issued if HPRDIAG=YES is specified.
  • waitack is the number of network layer packets (NLPs) currently in the waiting-for-acknowledgement queue.
IST1849I
  • This message is issued if HPRDIAG=YES is specified.
  • size is the number of data bytes contained in the largest network layer packet (NLP) sent on this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
IST1850I
  • This message is issued if HPRDIAG=YES is specified.
  • size is the number of bytes contained in the largest network layer packet (NLP) received on this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
IST1851I
  • This message is issued if HPRDIAG=YES is specified.
  • smoothed_time is the current smoothed round trip time, in milliseconds, for this Rapid Transfer Protocol (RTP). If that time is less than one millisecond, it will be rounded up to one millisecond in this message display.
IST1852I
  • This message is issued if HPRDIAG=YES is specified.
  • liveness is the value of the liveness timer, in seconds. The liveness timer specifies how long to wait without receipt of a network layer packet (NLP) from the connection partner before sending a liveness message to verify that the connection is still operational.

    If liveness is zero, the RTP pipe is traversing a one-hop Enterprise Extender (including those RTP pipes where the RSCV describes a two-hop path across an EE connection network), and HPR Liveness Reduction for EE is enabled. The HPR ALIVE timer will not be used by this RTP endpoint. The HPR Liveness Reduction for EE function is enabled by the HPREELIV operand specified on the XCA Major Node for Enterprise Extender. See the z/OS Communications Server: SNA Resource Definition Reference for more information about the liveness timer.

IST1853I
  • This message is issued if HPRDIAG=YES is specified.
  • outofsequence is the number of network layer packets (NLPs) currently in the out-of-sequence queue.
IST1854I
  • This message is issued if HPRDIAG=YES is specified.
  • inboundsegs is the number of network layer packets (NLPs) currently in the inbound segments queue.
IST1856I
  • This message is issued if HPRDIAG=YES is specified and a path switch has occurred for this Rapid Transfer Protocol (RTP). It is the first of a subgroup of messages that includes one of the following messages: IST1817I, IST1818I, IST1819I, IST1820I, IST1821I, and IST1822I. The date and time are displayed for the last path switch occurrence.
  • The date and time values specify the date and time of the last path switch occurrence. See DATE and TIME formats for information about the date and time values.
IST1857I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the RTP backpressure information in the display.
IST1858I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the information displayed in message IST1859I.
IST1859I
  • This message is issued if HPRDIAG=YES is specified. It displays the number of times that this Rapid Transfer Protocol (RTP) pipe went into backpressure (held up outbound data transmission) since the last CLEAR command was issued or the activation of the RTP pipe. Additional backpressure information is in message IST2211I.
  • pathswitch is the number of times that this RTP pipewent into backpressure because of a path switch.
  • sendqmax is the number of times that this RTP pipe went into backpressure by reaching the send queue maximum limit.
  • storefail is the number of times that this RTP pipe went into backpressure because of a failure to obtain storage.
  • stalledpipe is the number of times that this RTP pipe went into backpressure because of a stalled RTP pipe. An RTP pipe is considered stalled when data is not flowing because of one of the following conditions:
    • The RTP partner requests the retransmission of at least one NLP, but that request cannot be honored.
    • The RTP partner repeatedly requests the retransmission of the same NLP. In this case, VTAM honors the request by retransmitting the NLP, but the partner does not receive this NLP.
IST1862I
  • This message is issued if HPRDIAG=YES is specified.
  • maximum is the Adaptive Rate-Based (ARB) pacing maximum send rate that was reached for this Rapid Transfer Protocol (RTP) since the HPR PU was activated.
  • units is the unit of measure for the rate and is displayed in bits, kilobits, or megabits per second (BITS/SEC, KBITS/SEC, or MBITS/SEC).
IST1937I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the most recent RTP path switch was initiated by the remote partner.
IST1958I
  • This message is issued if HPRDIAG=YES is specified.
  • orphaned_NLP_count is the number of I/O buffers that were not returned by the DLC since the last CLEAR command was issued or the activation of the RTP pipe. A nonzero count indicates a device or DLC problem.
IST1968I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the Adaptive Rate-Based (ARB) pacing information in the display.
IST1969I
  • This message is issued if HPRDIAG=YES is specified.
  • max_rate is the maximum rate at which data was sent over the RTP connection since the last CLEAR command was issued or the activation of the RTP pipe.
  • units is the unit of measure for the rate and is displayed in bits, kilobits, or megabits per second (BITS/SEC, KBITS/SEC, or MBITS/SEC).
  • The data flow rate is updated approximately every second while data is flowing.
IST1970I
  • This message is issued if HPRDIAG=YES is specified and IST1697I indicates that the responsive mode enhancements for the Adaptive Rate-Based (ARB) pacing algorithm is being used.
  • count is number of times the data flow rate was reduced because of excessive packet loss since the last CLEAR command was issued or the activation of the RTP pipe. This value also represents the number of times that the ARB mode changed to yellow.
IST1971I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the RTP timer information in the display.
IST1972I
  • This message is issued if HPRDIAG=YES is specified.
  • timer is the short request timer value. This is the amount of time allotted for the connection partner to respond to status requests from this host.
IST1973I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the outbound data information in the display.
IST1974I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of network layer packets (NLPs) that were sent on this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
  • estimate is an estimate of count. It is in the form xxxU, where xxx is a numeric value and U is the unit of measure for xxx as follows:
    K
    estimate is in units of 1000 NLPs.
    M
    estimate is in units of 1 000 000 NLPs.
    G
    estimate is in units of 1 000 000 000 NLPs.
    T
    estimate is in units of 1 000 000 000 000 NLPs.
    P
    estimate is in units of 1 000 000 000 000 000 NLPs.
IST1975I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the total number of bytes that were sent on this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
  • estimate is an estimate of count. It is in the form xxxU, where xxx is a numeric value and U is the unit of measure for xxx as follows:
    K
    estimate is in units of 1000 bytes.
    M
    estimate is in units of 1 000 000 bytes.
    G
    estimate is in units of 1 000 000 000 bytes.
    T
    estimate is in units of 1 000 000 000 000 bytes.
    P
    estimate is in units of 1 000 000 000 000 000 bytes.
IST1976I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the total number of bytes that were retransmitted on this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
  • estimate is an estimate of count. It is in the form xxxU, where xxx is a numeric value and U is the unit of measure for xxx as follows:
    K
    estimate is in units of 1000 bytes.
    M
    estimate is in units of 1 000 000 bytes.
    G
    estimate is in units of 1 000 000 000 bytes.
    T
    estimate is in units of 1 000 000 000 000 bytes.
    P
    estimate is in units of 1 000 000 000 000 000 bytes.
IST1977I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the maximum number of network layer packets (NLPs) that have been in the waiting-for-acknowledgement queue since the last CLEAR command was issued or the activation of the RTP pipe.
IST1978I
  • This message is issued if HPRDIAG=YES is specified.
  • The date and time values specify when the waiting-for-acknowledgement queue maximum length was most recently reached. See DATE and TIME formats for information about the date and time values.
IST1979I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the inbound data information in the display.
IST1980I
  • This message is issued if HPRDIAG=YES is specified.
  • sequence_num is either the current send byte sequence number, if issued with the IST1973I header message, or the current receive byte sequence number, if issued with the IST1979I header message.
  • hex_value is the hexadecimal representation of sequence_num.
IST1981I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the total number of bytes that were received on this Rapid Transfer Protocol (RTP) pipe since the last CLEAR command was issued or the activation of the RTP pipe.
  • estimate is an estimate of count. It is in the form xxxU, where xxx is a numeric value and U is the unit of measure for xxx as follows:
    K
    estimate is in units of 1000 bytes.
    M
    estimate is in units of 1 000 000 bytes.
    G
    estimate is in units of 1 000 000 000 bytes.
    T
    estimate is in units of 1 000 000 000 000 bytes.
    P
    estimate is in units of 1 000 000 000 000 000 bytes.
IST1982I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of network layer packets (NLPs) currently in the inbound work queue.
IST1983I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the maximum number of network layer packets (NLPs) that were in the inbound work queue since the last CLEAR command was issued or the activation of the RTP pipe.
IST1984I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the RTP path switch information in the display.
IST1985I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of RTP path switches that were initiated from the remote partner since the last CLEAR command was issued or the activation of the RTP pipe.
IST1986I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of RTP path switches initiated locally since the last CLEAR command was issued or the activation of the RTP pipe.
IST1987I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of RTP path switches that occurred as the result of local failure since the last CLEAR command was issued or the activation of the RTP pipe.
IST1988I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of RTP path switches that occurred as the result of local PSRETRY since the last CLEAR command was issued or the activation of the RTP pipe.
IST2059I
  • This message is issued if HPRDIAG=YES is specified.
  • count is the number of network layer packets (NLPs) that were received on this Rapid Transfer Protocol (RTP) since the last CLEAR command was issued or the activation of the RTP pipe.
  • estimate is an estimate of count. It is in the form xxxU, where xxx is a numeric value and U is the unit of measure for xxx as follows:
    K
    estimate is in units of 1000 NLPs.
    M
    estimate is in units of 1 000 000 NLPs.
    G
    estimate is in units of 1 000 000 000 NLPs.
    T
    estimate is in units of 1 000 000 000 000 NLPs.
    P
    estimate is in units of 1 000 000 000 000 000 NLPs.
IST2085I
  • This message is issued if HPRDIAG=YES is specified.
  • num_nlps is the number of work elements currently on the RPNCB outbound work queue.
IST2086I
  • This message is issued if HPRDIAG=YES is specified.
  • max_num_nlps is the maximum number of work elements that have been on the RPNCB outbound work queue since the last CLEAR command was issued or the activation of the RTP pipe.
IST2087I
  • This message is issued if HPRDIAG=YES is specified.
  • The date and time values specify when the RPNCB outbound work queue maximum length was most recently reached. See DATE and TIME formats for information about the date and time values.
IST2205I
  • This message is used as a separator message.
IST2211I
  • This message is issued if HPRDIAG=YES is specified. It is a header message for the information displayed in message IST2212I. This is a continuation of the information displayed in message IST1858I.
IST2212I
  • This message is issued if HPRDIAG=YES is specified. It displays the number of times that this Rapid Transfer Protocol (RTP) pipe went into backpressure (held up outbound data transmission) since the last CLEAR command was issued or the activation of the RTP pipe.
  • The ackqmax value is the number of times that this RTP went into backpressure by reaching the waiting-for-acknowledgement queue maximum limit.
IST2213I
  • This message is issued if HPRDIAG=YES is specified.
  • The date and time values specify when RTP backpressure was most recently applied. See DATE and TIME formats for information about the date and time values.
IST2214I
  • This message is displayed following message IST2213I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the most recent RTP backpressure was applied because of a pathswitch.
IST2215I
  • This message is displayed following message IST2213I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the most recent RTP backpressure was applied because the send queue maximum limit was reached.
IST2216I
  • This message is displayed following message IST2213I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the most recent RTP backpressure was applied because of a storage failure.
IST2217I
  • This message is displayed following message IST2213I if HPRDIAG=YES was specified on the DISPLAY ID command for an RTP pipe and the most recent RTP backpressure was applied because of a stalled pipe. An RTP pipe is considered stalled when data is not flowing because of one of the following conditions:
    • The RTP partner requests the retransmission of at least one NLP, but the request cannot be honored.
    • The RTP partner repeatedly requests the retransmission of the same NLP. In this case, VTAM honors the request by retransmitting the NLP, but the partner does not receive this NLP.
IST2218I
  • This message is displayed following message IST2213I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the most recent RTP backpressure was applied because the waiting-for-acknowledgement queue maximum limit was reached.
IST2229I
  • This message is issued if HPRDIAG=YES is specified.
  • refifo is the refifo timer value. This is the amount of time this end of the RTP pipe waits before reporting missing packets (gaps) to the partner.
IST2230I
  • This message is issued if HPRDIAG=YES is specified.
  • maxoutofsequence is the maximum number of network layer packets (NLPs) that have been on the out-of-sequence queue since the last CLEAR command was issued or the activation of the RTP pipe.
IST2236I
  • This message is issued if HPRDIAG=YES is specified.
  • The date and time values specify when a network layer packet (NLP) was most recently retransmitted for this RTP pipe since the HPR PU was activated. See DATE and TIME formats for information about the date and time values.
IST2239I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a Rapid Transfer Protocol (RTP) and the last path switch took place for the recovery of an MNPS application.
IST2248I
  • This message is issued if HPRDIAG=YES and CLEAR=ALL are specified.
  • The number value is the total number of RTP pipes whose diagnostic counters were cleared. The number value is always 1 when the DISPLAY ID command is issued with HPRDIAG=YES and CLEAR=ALL.
IST2249I
  • This message is issued if HPRDIAG=YES is specified.
  • The percentage value is the retransmission rate as a percentage of NLPs that were sent since the last CLEAR command was issued or since the activation of the RTP pipe. The percentage is accurate to 4 decimal places.
IST2250I
  • This message is issued if HPRDIAG=YES is specified.
  • The date and time values specify when all diagnostic counters for the RTP pipe were cleared with the CLEAR command or since the activation of the pipe. See DATE and TIME formats for information about the date and time values.
IST2267I
  • This message indicates that the progressive-mode adaptive rate-based (ARB) pacing algorithm is being used.
IST2268I
  • This message is issued if HPRDIAG=YES is specified.
  • The waitforackbytes value is the total number of bytes that are currently in the waiting-for-acknowledgement queue.
IST2269I
  • This message is issued if HPRDIAG=YES is specified.
  • The maxwaitforack value is the maximum number of bytes that have been in the waiting-for-acknowledgement queue since the last CLEAR command was issued or the activation of the RTP pipe. If the value displayed is 999999999, this means that the maximum value reached 999999999 bytes or more.
IST2271I
  • This message is issued if HPRDIAG=YES is specified.
  • The ps_delay_value value is the HPR path switch delay value, in seconds, that is configured for this RTP pipe. This value specifies the amount of time that this RTP endpoint will delay entering the path switch state as a result of an unresponsive RTP partner.
IST2272I
  • This message is issued if HPRDIAG=YES is specified and this RTP endpoint is in the path switch delay state as a result of an unresponsive partner.
  • The date and time values specify when all diagnostic counters for the RTP pipe were cleared with the CLEAR command or since the activation of the pipe. See DATE and TIME formats for information about the date and time values.
IST2335I
  • This message is displayed following message IST1856I if HPRDIAG=YES was specified on the DISPLAY ID command for a rapid transfer protocol (RTP) pipe and the last path switch took place because an transmission (XMIT) stalled condition was detected. The XMIT stalled condition is detected when the partner RTP end point requested an NLP to be retransmitted six times and ten seconds have elapsed since the packet was initially sent.
IST2395I
  • This message indicates that the base-mode adaptive rate-based (ARB) pacing algorithm is being used.

System action

None.

Operator response

None.

System programmer response

None.

Routing code

2

Descriptor code

5

Parent topic: IST messages for VTAM network operators IST1600I – IST1999I