Use the OSA Express3 Ports Errors attributes to monitor error and control data for individual ports on a OSA-Express3 feature.
There can be two physical ports on each OSA channel path identifier, each with different data. On z/OS verion 1.10 or later, when two ports are present, each one is assigned a separate ifIndex by the operating system. Each ifIndex contains the data for the corresponding port.
Alignment Errors The number of packets received during the most recent time interval with alignment errors (the packet is not an integer number of bytes in length). This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Channel Number The channel path identifier (CHPID) corresponding to this device. The format is a string of two hexadecimal characters.
CRC Errors The number of packets received with cyclic redundancy check (CRC) errors during the most recent time interval. The format is an unsigned integer.
Collection Time The time and date of the data sampling. This time is displayed in the following format:
mm/dd/yy hh:mm:ss
Where:
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:
Deferred Events The number of events that were deferred by the OSA during the most recent time interval. A deferred event occurs when the transmitter cannot immediately send a packet because the medium is busy for one of these reasons:
This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Excessive Collisions The number of times that a packet successfully transmitted by the OSA encountered more than 16 collisions during the most recent time interval. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Fragmented Frames Received The number of frames received by the OSA during the most recent time interval that passed address filtering, were smaller than the minimum size of 64 bytes, and had a bad cyclic redundancy check (CRC). The format is an unsigned integer.
Host Name The host name of the TCP/IP stack. The format is an alphanumeric string no longer than 255 characters.
Jabber Frames Received The number of frames received by the OSA during the most recent time interval that passed address filtering, were greater than maximum size in length, and had a bad cyclic redundancy check (CRC). The format is an unsigned integer.
The maximum transmission unit (MTU) is the maximum packet size, in bytes, that can be sent on an interface. You can set the MTU size (as long as you stay within the limits and maximum values of the OSA) using TCP/IP profile statements. You can also set the parameters of the neighboring network interface card (NIC) and port (usually a port on a switch, but could be another OSA). For information about setting maximum size for OSA devices, refer to the IBM z/OS Communications Server: IP Configuration Reference..
Late Collisions The number of late collisions encountered by the OSA during the most recent time interval. Late collisions occur under the following circumstances:
This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsgined integer.
Length Error Packets Received The number of length-error packets received by the OSA during the most recent time interval. A length error occurs if an incoming packet passes filter criteria, but is undersized or oversized. The format is an unsigned integer.
Missed Packets The number of packets that were missed by the OSA during the most recent time interval because not enough space was available to store the incoming packet. The format is an unsigned integer.
Multiple Collisions The number of times that a packet successfully transmitted by the OSA encountered more than 1 collision, but fewer than 16, during the most recent time interval. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Not Stored Frames Received The number of times that frames were received by the OSA during the most recent time interval when no buffers were available in host memory to store those frames. The format is an unsigned integer.
Origin Node The unique identifier for the TCP/IP stack being displayed. The format is an alphanumeric string no longer than 32 characters.
Oversized Frames Received The number of frames received by the OSA during the most recent time interval that passed address filtering and had a valid cyclic redundancy check (CRC), but were longer than the maximum size of 1522 bytes for operating-system embedded (OSE) non-queued direct I/O (non-QDIO) features or 16384 bytes for open source definition (OSD) queued direct I/O (QDIO) features. The format is an unsigned integer.
Port Name The name of the port as specified by the VTAM Transport Resource List Entry (TRLE). The format is a 32-character alphanumeric string.
Port Number The physical port number for this port. The format is an integer.
Sequence Errors The number of sequence error events by the OSA during the most recent time interval. The proper sequence of 8b/10b symbols is as follows:
This count increments for any illegal sequence of delimiters. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Single Collisions The number of times that a packet successfully transmitted by the OSA encountered a single collision during the most recent time interval. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
System ID The SMF system ID. The format is an alphanumeric string no longer than 4 characters.
TCPIP STC Name The name of the TCP/IP job. The format is an alphanumeric string no longer than 8 characters.
Total Alignment Errors The number of packets received by the OSA since the last time the OSA port was reset with alignment errors (the packet is not an integer number of bytes in length). This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total CRC Errors The number of packets received by the OSA with cyclic redundancy check (CRC) errors since the last time the OSA port was reset. The format is an unsigned integer.
Total Deferred Events The number of events deferred by the OSA since the last time the OSA port was reset. A deferred event occurs when the transmitter cannot immediately send a packet because the medium is busy for one of these reasons:
This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total Excessive Collisions The number of times that a packet successfully transmitted by the OSA encountered more than 16 collisions by the OSA since the last time the OSA port was reset. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total Fragmented Frames Received The number of frames received by the OSA since the last time the OSA port was reset that passed address filtering, were smaller than the minimum size of 64 bytes, and had a bad cyclic redundancy check (CRC). The format is an unsigned integer.
Total Jabber Frames Received The number of frames received by the OSA since the last time the OSA port was reset that passed address filtering, were greater than maximum size in length, and had a bad cyclic redundancy check (CRC). The format is an unsigned integer.
The maximum transmission unit (MTU) is the maximum packet size, in bytes, that can be sent on an interface. You can set the MTU size (as long as you stay within the limits and maximum values of the OSA) using TCP/IP profile statements. You can also set the parameters of the neighboring network interface card (NIC) and port (usually a port on a switch, but could be another OSA). For information about setting maximum size for OSA devices, refer to the IBM z/OS Communications Server: IP Configuration Reference..
Total Length Error Packets Received The number of packet length-error events received by the OSA since the last time the OSA port was reset. A length error occurs if an incoming packet passes filter criteria, but is undersized or oversized. The format is an unsigned integer.
Total Late Collisions The number of late collisions encountered by the OSA since the last time the OSA port was reset. Late collisions occur under the following circumstances:
This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total Missed Packets The number of packets that were missed by the OSA since the last time the OSA port was reset because too little space was available to store the incoming packet. The format is an unsigned integer.
Total Multiple Collisions The number of times that a packet successfully transmitted by the OSA encountered more than 1 collision, but fewer than 16, since the last time the OSA port was reset. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total Not Stored Frames Received The number of times that frames were received by the OSA since the last time the OSA port was reset when no buffers were available in host memory to store those frames. The format is an unsigned integer.
Total Oversized Frames Received The number of frames received by the OSA since the last time the OSA port was reset that passed address filtering and had a valid cyclic redundancy check (CRC), but were longer than the maximum size of 1522 bytes for operating-system embedded (OSE) non-queued direct I/O (non-QDIO) features or 16384 bytes for open source definition (OSD) queued direct I/O (QDIO) features. The format is an unsigned integer.
Total Sequence Errors The number of sequence error events experienced by the OSA since the last time the OSA port was reset. The proper sequence of 8b/10b symbols is as follows:
This count increments for any illegal sequence of delimiters. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total Single Collisions The number of times that a packet successfully transmitted by the OSA encountered a single collision by the OSA since the last time the OSA port was reset. This field is not valid for 10 gigabit features and will be zero (0) for these devices. The format is an unsigned integer.
Total Undersized Frames Received The number of frames received by the OSA since the last time the OSA port was reset that passed address filtering, were smaller than the minimum size of 64 bytes, and had a valid cyclic redundancy check (CRC). Packets shorter then 64 bytes must be padded and may indicate that the LAN is incorrectly configured and not performing up to capacity. The format is an unsigned integer.
Undersized Frames Received The number of frames received by the OSA during the most recent time interval that passed address filtering, were smaller than the minimum size of 64 bytes, and had a valid cyclic redundancy check (CRC). Packets shorter then 64 bytes must be padded and may indicate that the LAN is incorrectly configured and not performing up to capacity. The format is an unsigned integer.