Understanding the DuplexAssumed parameter

The DuplexAssumed parameter in the discovery.conf file controls how to set the duplex mode for network adapters in the topology. Valid values are TRUE and FALSE. The default value is TRUE.

• A value of TRUE indicates that duplex mode is assumed for all network adapters regardless of whether duplex mode can be determined by checking the MIBs.

• A value of FALSE indicates that duplex mode is set only for the network adapters for which duplex mode can be determined by checking the MIBs.

  A value of TRUE means that IP Performance Manager will monitor all network adapters in the topology for HighUtilization faults. For any network adapter whose duplex mode cannot be determined by checking the MIBs, IP Performance Manager sets the adapter’s DuplexMode attribute to FULLDUPLEX and its DuplexSource attribute to ASSUMED. The one exception is the 10 megabit (Mb) Ethernet adapter, for which IP Performance Manager sets the adapter’s DuplexMode attribute to HALFDUPLEX.

  Note:

  Be aware that monitoring all network adapters in the topology requires considerable system resources. Ensure that your server is sized properly to accommodate the size of your environment, as described in the VMware Smart Assurance IP Manager Deployment Guide.

  A value of FALSE means that IP Performance Manager will monitor only those network adapters that can be determined as full-duplex or half-duplex by reading the Enterprise MIB, ETHERLIKE-MIB, and Neighbor MIB. Any network adapter having an unspecified duplex mode setting will be ignored.