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Lund Performance Solutions


SOS Network Summary

The Network Summary Screen

The Network Summary screen displays network performance information.


Figure 16.1 SOS Network Summary screen
To access the Network Summary screen from any SOS display screen:
  • Type s from the SOS Enter command: prompt to view the Screen Selection Menu screen.
  • From the Screen Selection Menu screen, enter l (Network Summary). The Network Summary screen will display. Figure 16.1 shows an example of the screen.
  • Network Summary Screen Display Items

    NETWORK SUMMARY

    The NETWORK SUMMARY portion of the screen displays the network traffic information from the perspective of each protocol. Each data item is described in the next table.
    Table 16.1 SOS NETWORK SUMMARY data items
    Data Item
    Description
    Protocol
    The network protocols used for communication between systems.
    Packets In/s
    The number of packets received per second. (The value in brackets is cumulative.)
    Packets Out/s
    The number of packets sent per second.
    Errors In%
    The percentage of packets read during the interval that resulted in error.
    Errors Out%
    The percentage of packets written during the interval that resulted in error.

    NETWORK INTERFACES

    The NETWORK INTERFACES portion of the Network Summary screen displays performance information on a per-network-interface basis. Each data item is described in Table 16.2.
    Table 16.2 SOS NETWORK INTERFACES data items
    Data Item
    Description
    Interf
    The names of the network interfaces.
    Packets In/s
    The number of packets received per second for the specific interface. (The value in brackets is cumulative.)
    Packets Out/s
    The number of packets sent per second for the specific interface.
    Defer%
    The percentage of output packets deferred during the interval. A packet is deferred when the LAN card is too busy with other incoming and outgoing packets.
    Coll%
    The percentage of output packets sent that resulted in a collision. A network collision occurs when the system sends a packet at the same time as another system. When collisions occur, the system dispatching them waits a random amount of time to retransmit the packet. Excessive collision percentages indicate a network bottleneck.
    Err In%
    The percentage of packets read during the interval that resulted in error.
    Err Out%
    The percentage of packets written during the interval that resulted in error.
    Nocan
    The count of incoming packets that were dropped per second.
    TOTALS
    The TOTALS line provides data values from a system-wide perspective.

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