Interfaces workspace
The Interfaces workspace provides information about TCP/IP interfaces.
This workspace is displayed by clicking the Interfaces Navigator
item in the navigation tree. Right-clicking on the Interfaces
Navigator item and selecting Workspaces provides
access to these additional workspaces:
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).
- The Interface Status and Interface Statistics workspaces contain
data only if the address space being monitored is running on z/OS
v1.12 or later. These workspace were created to exploit the z/OS v1.12
or later callable network management interfaces (NMI) feature.
- The workspace is deprecated. When z/OS v1.12 is the lowest level
of z/OS supported by the OMEGAMON monitoring agents, this workspace
will no longer be the default workspace and may be removed.
- 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.
- DVIPA reporting has changed between z/OS v1.11 and z/OS
v1.12.
In z/OS v1.11 and earlier, when SNMP is used to report DVIPA
data, this workspace will display DVIPAs. The following attributes
are reported for a DVIPA in the Interfaces workspace pre z/OS v1.12:
- Interface Name
- Interface Type
- Interface Description
- Current State
- MTU Size.
Important::
The value for
this attribute in the Interfaces workspace reflects the capacity of
the interface to handle DVIPA data, not the capacity of the DVIPA
to route data. Traffic is limited by the MTU Size of the route, not
the size of the interface. Therefore, for a defined DVIPA. it is more
likely that the MTU Value attribute in the Gateways and Devices workspace
controls the size of the packets flowing over DVIPA, so the MTU Value
attribute in the Gateways attribute group is more pertinent for debugging.
This limited DVIPA support is because z/OS Communications Server
does not provide performance metrics (such as packet and byte counts)
for DVIPAs. Performance metrics have always displayed as zero (0)
regardless of z/OS release or collection method.
In z/OS v1.12
and later, DVIPAs are no longer reported in the Interfaces workspace.
DVIPAs are now reported in the Gateways and Devices workspace.
The Interfaces workspace provides the following views:
- Packets Discarded > 0: Displays the percentage
of packets discarded by interface name in a bar chart, where:
- Yellow represents the Percent Packets Discarded.
- Packet Errors > 0: Displays percentage of
packets in error by interface name in a bar chart, where:
- Yellow represents the Percent Packets in
Error
- Bandwidth Utilization > 0: 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 bar chart
where:
- Yellow represents Transmit Bandwidth Utilization.
- Blue represents Receive Bandwidth Utilization.
- Pink represents Total Bandwidth Utilization
- Interfaces Summary table: Contains
one row for each time period for the selected TCP/IP interface. The
Interface attributes display performance and identifying information
for each interface. Click the Link icon in the Interfaces Summary
table to display the Interfaces History workspace .
Interfaces Summary table
The Interfaces 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.
To view historical data about any interface in the Interface Summary
table, right-click the Link icon by a row in
the table to display the Interfaces History workspace for
that interface for a specified time period. The default is the last
24 hours.
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.
See also: