Interfaces History workspace
The Interfaces History workspace provides historical information
about a selected TCP/IP interface. This workspace displays the most
recent 24 hours of historical data by default. You must configure
historical collection for the Interfaces attribute group to see data
for this workspace.
This workspace can be displayed by right-clicking on the Interfaces
Navigator item or by clicking on a the Link icon
in a row of the Interfaces Summary table.
Short Term History support is an optional feature that must be
enabled for this workspace to display attribute and metric values.
If this workspace does not contain data, you will see message KFWITM220E
Request failed during execution. displayed in the Tivoli Enterprise
Portal message area. Contact your system administrator to request
that historical collection be started for this attribute group.
This workspace can be displayed clicking on the Link icon
for a specific interface in the Interfaces Summary table
Notes:
- If the address space being monitored is running on
z/OS v1.11 or earlier, the values for these attributes are retrieved
using SNMP. If the address space being monitored is running on z/OS
v1.12 or later, the values for these attributes are retrieved using
the z/OS Communications Server callable network management interface
(NMI).
- If you are viewing this workspace on z/OS v1.12, non-strategic
interfaces report only status information. Performance-related attributes
show a value of zero (0). The strategic interfaces have one of the
following Interface Types:
- Loopback
- OSA-Express Queued Direct I/O (QDIO) Ethernet
- HiperSockets
- Multipath Channel Point-To-Point (MPCPTP)
- Under z/OS v1.11 or earlier, it is possible for the value of the
Percent Inbound Packets in Error attribute to actually exceed 100%.
This occurrence is due to the way inbound packets and errors are counted
in the Communications Server TCP/IP stack. Many errors are encountered
and recorded before the stack can determine how many packets were
received, or whether the packets are unicast, multicast, or broadcast.
In this case, the TCP/IP stack records the error, but not the inbound
packet. In unusual circumstances, the number of errors recorded might
exceed the number of inbound packets recorded.
- Configuration of historical collection for the Interfaces attribute
group is required to see data for this workspace.
The following views provide information in this workspace:
- Packets Discarded: Shows a historical view
of the number of packets discarded per minute sent by this interface
for the specified time period in a time-line chart, where:
- Yellow represents the inbound packet discard
rate
- Blue represents the outbound packet discard
rate
- Packet Errors: Shows the number of inbound
and outbound packets with errors by this interface for the specified
time period in a time-line chart, where:
- Blue represents the percentage of outbound
packets in error
- Yellow represents the percentage of inbound
packets in error
- Bandwidth Utilization: Shows a historical
view of both the percentage bandwidth utilization for transmit and
receive operations compared to total bandwidth utilization for this
interface per minute during the specified time period in a time-line
chart, where:
- Pink represents the transmit bandwidth utilization
- Blue represents the receive bandwidth utilization
- Yellow represents total bandwidth utilization
- Packet Rate: Shows the number of inbound
and outbound packets in transit for this interface for the specified
time period in a time-line chart, where:
- Blue represents the transmit packet rate
- Yellow represents the receive packet rate
- Interfaces History Summary table:
Contains one row for each time period for the selected TCP/IP interface.
The Interface attributes can display performance and identifying information
for a specific interface.
Interfaces History Summary table
The Interfaces History Summary table contains one row for each
TCP/IP interface and provides a summary of detailed information for
each. The Interface attributes can display performance and identifying
information for a specific interface. The data in this table is retrieved
using SNMP.
The attributes displayed in the history workspaces represent a
subset of the attributes supported by the Interfaces workspace (for
enhanced performance). For a complete list of the attributes available
in the Interfaces Summary table, and a brief description of each,
see the Interfaces Attributes help panel. Because this is
a history panel, a unique attribute is listed in addition to the Interfaces
attributes:
- Recording Time
- The time and date of the data sampling. Recording time displays
the exact collection interval boundary (such as every 00:15:00 minutes).
This value is displayed in the following format:
mm/dd/yy hh:mm:ss
Where:
- mm = Month
- dd = Day of the month
- yy = Year
- hh = Hour
- mm = Minute
- ss = seconds
See also: