TCPIP Summary Attributes

Use the TCPIP Summary attributes to show the general health and activity of the TCP/IP stack at a glance.

Note: If the address space being monitored is running on z/OS® v1.11 or earlier, these attributes are retrieved using SNMP. If the address space being monitored is running on z/OS v1.12 or later, these attributes are retrieved using the z/OS Communications Server callable network management interface (NMI).

Application Count The number of active TCP/IP applications when the most recent time interval ended. The format is an integer.

Byte Rate The number of bytes received or sent, per minute, during the most recent time interval. When the measured value exceeds 2,147,483,647 (the maximum value), the attribute will be set to 2,147,483,647. The format is an integer.

Collection Interval The time, in minutes, between successive samples; the sampling interval. The format is an integer between 1 and 60.

The Collection Interval was set in the Configuration Tool SPECIFY COMPONENT CONFIGURATION panel by specifying a value for the TCP/IP Sample Interval field or in PARMGEN using the KN3_TCP_SAMPLE_INTERVAL parameter. The Collection Interval controls collection of all TCP/IP data plus Communication Storage Manager (CSM), Enterprise Extender (EE), and High Performance Routing (HPR) data.

Collection Time The time and date of the data sampling. This time is displayed in the following format:

mm/dd/yy hh:mm:ss (Tivoli Enterprise Portal) or yy/mm/dd hh:mm:ss (3270)

Where:

  • mm = Month
  • dd = Day of the month
  • yy = Year
  • hh = Hour
  • mm = Minute
  • ss = Seconds

The stored format is a string no longer than 16 characters in the format CYYMMDDHHMMSSmmm (as in 1020315064501000 for 03/15/02 06:45:01) where:

  • C = Century (0 for 20th, 1 for 21st)
  • Y = Year
  • M = Month
  • D = Day
  • H = Hour
  • M = Minute
  • S = Second
  • m = Millisecond

Connection Count The number of active connections at the end of the most recent time interval. This number represents the total number of rows in the TCP Connections table, the UDP Endpoints table, and the TCP Listener table. The format is an integer.

CPU Percentage The percentage of CPU in use when the sampling interval ended. The range for this value is from 0% to 100%.

CSA Percent Below 16MB The percentage of Common System Area (CSA) storage below the 16MB line in use when the last sampling interval ended. The range for this value is from 0% to 100%.

CSA Usage Below 16MB Currently Allocated The amount of Common System Area (CSA) storage below the 16MB line in use when the last sampling interval ended. The format is an integer.

Device Count The number of devices defined for the TCP/IP stack. The format is an integer.

Note: If the address space being monitored is running on z/OS v1.11 or earlier, these attributes are retrieved using SNMP. If the address space being monitored is running on z/OS v1.12 or later, these attributes are retrieved using the z/OS Communications Server callable network management interface (NMI).

Fragmentation Count The number of IP segments requiring fragmentation that was successfully fragmented. The format is an integer.

Note: Segments require fragmentation when they are too large for the next network hop.

Fragmentation Failure Percentage The percentage of IP segments requiring fragmentation that was not successfully fragmented. The range for this value is from 0% to 100%.

Fragmentation Failures The number of IP segments requiring fragmentation that was not successfully fragmented. The format is an integer.

Fragmentation Percentage The percentage of IP segments successfully fragmented since TCP/IP initialization. The range for this value is from 0% to 100%.

Gateway Count The number of gateways defined for the TCP/IP stack. Gateways are routers to other physical networks. The format is an integer.

Host IP Address The IP address of the host. The format is a text string no longer than 45 characters.

Host IP Address (IPv4 only) The IP address of the host. The format is a 15 character string. This attribute value is set only if the character representation of the host's IP address fits within 15 characters. This attribute is not displayed by default.

Host Name The host name of the TCP/IP stack. The format is an alphanumeric string no longer than 255 characters.

Input Discard Percentage The percentage of IP segments this TCP/IP address space received from the network that was undeliverable and therefore discarded. The range for this value is from 0% to 100%.

Input Discards The number of IP segments this TCP/IP address space received that was undeliverable and therefore discarded since TCP/IP initialization. The format is an integer.

Reasons for discarding input segments include

  • Hardware errors
  • Addressing errors
  • Unknown protocols

Input Packet Count The number of IP packets, including those found in error, that this TCP/IP address space received from the network since TCP/IP initialization. When the value in the Input Packet Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the Input Packet Count (In G) field and the remainder is stored in the Input Packet Count field. The format is an integer.

Input Packet Count (In G) (deprecated) The number of IP packets (including those received in error) that this TCP/IP address space received from the network since TCP/IP initialization, divided by 1,073,741,824. When the value in the Input Packet Count field exceeds 1,073,741,823 (1 GB), the number is divided by 1,073,741,824. The quotient is stored in the Input Packet Count (in G) field and the remainder is stored in the Input Packet Count field. The format is an integer.

Interface Count The number of interfaces defined for the TCP/IP stack. The format is an integer.

Origin Node The unique identifier for the TCP/IP stack being displayed. The format is an alphanumeric string no longer than 32 characters.

Output Discard Percentage The percentage of all IP output segments from this TCP/IP address space that was undeliverable and therefore discarded. The range for this value is from 0% to 100%.

Output Discards The number of IP segments this address space did not send and therefore discarded since TCP/IP initialization. The format is an integer.

Reasons for discarding output segments include

  • No available routes
  • Segment needs fragmentation, but the Do Not Frag Bit was set

Output Packet Count The number of IP packets that local IP user-protocols (including ICMP) supplied to IP since TCP/IP initialization. When the value in the Output Packet Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the Output Packet Count (In G) field and the remainder is stored in the Output Packet Count field. The format is an integer.

Note: This count does not include any packets counted in Input Datagrams Forwarded.

Output Packet Count (in G) The number of IP packets that local IP user-protocols (including ICMP) supplied to IP since TCP/IP initialization, divided by 1,073,741,824. When the value in the Output Packet Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the Output Packet Count (in G) field and the remainder is stored in the Output Packet Count field. The format is an integer.

Note: This count does not include any packets counted in Input Datagrams Forwarded.

Paging Rate The paging rate when the last sampling interval ended. The range for this value is from 0% to 100%.

Reassembly Count The number of IP segments received that was successfully reassembled since TCP/IP initialization. The format is an integer.

Reassembly Failure Count The number of IP segments requiring reassembly that was not reassembled since TCP/IP initialization. A reassembly fails when all segments that compose the fragmented datagram are not received. The format is an integer.

Reassembly Failure Percentage The percentage of IP segments requiring reassembly that was not reassembled. A reassembly fails when all segments that compose the fragmented datagram are not received. The range for this value is from 0% to 100%.

The percentage is calculated as follows:

(Reassembly Failure Pct) = (Reassembly Failures) divided by (Reassemblies Requested)

Reassembly Percentage The percentage of IP segments that was reassembled since TCP/IP initialization. The range for this value is from 0% to 100%.

System ID The SMF system ID. The format is an alphanumeric string no longer than 4 characters.

TCP Input Segment Count The count of TCP segments this TCP/IP address space received from the network since TCP/IP initialization. When the value in the TCP Input Segment Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the TCP Input Segment Count (in G) field and the remainder is stored in the TCP Input Segment Count field. The format is an integer.

TCP Input Segment Count (in G) The count of TCP segments this TCP/IP address space received from the network since TCP/IP initialization, divided by 1,073,741,824. When the value in the TCP Input Segment Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the TCP Input Segment Count (in G) field and the remainder is stored in the TCP Input Segment Count field. The format is an integer.

TCP Output Segment Count The count of TCP segments this TCP/IP address space delivered to the network since TCP/IP initialization. When the value in the TCP Output Segment Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the TCP Output Segment Count (in G)field and the remainder is stored in the TCP Output Segment Count field. The format is an integer.

TCP Output Segment Count (in G) The count of TCP segments this TCP/IP address space delivered to the network since TCP/IP initialization, divided by 1,073,741,824. When the value in the TCP Output Segment Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the TCP Output Segment Count (in G) field and the remainder is stored in the TCP Output Segment Count field. The format is an integer.

TCP Retransmit Percentage The percentage of TCP segments that required retransmission. A TCP segment is retransmitted whenever the receiver does not acknowledge receipt, and a timeout occurs. The range for this value is from 0% to 100%.

The percentage is calculated as follows:

(TCP Retransmit Pct) = (Retransmitted TCP Segments) divided by (TCP Segments Out)

TCP Retransmitted Segments The number of TCP segments this host retransmitted since TCP/IP initialization. A segment is retransmitted whenever the receiver does not acknowledge receipt, and a timeout occurs. The format is an integer.

TCP Session Count The number of TCP sessions currently established to this TCP/IP address space. The format is an integer.

TCPIP STC Name The name of the TCP/IP job. The format is an alphanumeric string no longer than 8 characters.

Telnet Pool Percentage The percentage of Telnet pool entries in use. The range for this value is from 0% to 100%.

Telnet Pool Size The number of entries in the Telnet pool. Each Telnet user is allocated one entry from the pool. When the pool is exhausted, no new Telnet sessions can be started. The format is an integer.

Telnet Session Count The number of Telnet pool entries in use. Each Telnet user is allocated one entry from the pool. When the pool is exhausted, no new Telnet sessions can be started. The format is an integer.

Total CSA Percentage The percentage of Common System Area (CSA) used when the last sampling interval ended. The range for this value is from 0% to 100%.

Total CSA Usage The total amount of Common System Area (CSA) used when the last sampling interval ended. The format is an integer.

UDP Discard Percentage The percentage of UDP datagrams discarded as undeliverable because they were received in error (including No Port Found errors). The range for this value is from 0% to 100%.

The percentage is calculated as:

(UDP Discard Pct) = (UDP No Port Errors + UDP Other Errors) divided by (UDP Datagrams Received)

UDP Input Datagram Count The number of UDP datagrams received since TCP/IP initialization. When the value in the UDP Input Datagram Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the UDP Input Datagram Count (in G) field and the remainder is stored in the UDP Input Datagram Count field. The format is an integer.

UDP Input Datagram Count (in G) The number of UDP datagrams received since TCP/IP initialization, divided by 1,073,741,824. When the value in the UDP Input Datagram Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the UDP Input Datagram Count (in G) field and the remainder is stored in the UDP Input Datagram Count field. The format is an integer.

UDP Input Errors The number of datagrams discarded as undeliverable because they were received in error (excluding No Port Found errors) since TCP/IP initialization. The format is an integer.

UDP No Port Count The number of UDP datagrams discarded as undeliverable because the port number specified did not match that of any active applications. The format is an integer.

UDP Output Datagram Count The number of datagrams this host sent since TCP/IP initialization. When the value in the UDP Output Datagram Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the UDP Output Datagram Count (in G) field and the remainder is stored in the UDP Output Datagram Count field. The format is an integer.

UDP Output Datagram Count (in G) The number of datagrams this host sent since TCP/IP initialization, divided by 1,073,741,824. When the value in the UDP Output Datagram Count field exceeds 1,073,741,823, the number is divided by 1,073,741,824. The quotient is stored in the UDP Output Datagram Count (in G) field and the remainder is stored in the UDP Output Datagram Count field. The format is an integer.

zOS Release IBM® internal use only.