If transmit PHY rate between all pairs of MoCA nodes are
greater than or equal to 'mocaIfPhyThreshold', then transmit PHY
rate of one pair of MoCA node is less than 'mocaIfPhyThreshold',
send this notification if 'mocaIfPhyThresholdEnable' is 'true'.
          
This notification sends the lowest PHY rate in the MoCA network,
or 'mocaMeshTxRate', which is the transmit PHY rate from the
node specified with 'mocaMeshTxNodeIndex', to the node specified
with 'mocaMeshRxNodeIndex'.
          
If multiple links have the same lowest PHY rate, sends the PHY
rate for the link with the lowest 'mocaMeshTxNodeIndex'.  If
multiple links with the same 'mocaMeshTxNodeIndex' have the same
lowest PHY rate, sends the PHY rate for the link with the lowest
'mocaMeshRxNodeIndex'.
                  
Network management system should access 'mocaMeshTable' to find
if there are additional links below the threshold bandwidth.
          
For example, MoCA interface with 'ifIndex' 1 detects transmit
PHY rate from 'mocaMeshTxNodeIndex' 2 to 'mocaMeshRxNodeIndex' 4
is 150 Mbps, and this link is the first link to drop below the
'mocaIfPhyThreshold', then this trap contains one variable
binding of
    mocaMeshTxRate.1.2.4 = 150

If transmit PHY rate between one or more pairs of MoCA nodes
are less than 'mocaIfPhyThreshold', then transmit PHY rate
between all pairs of MoCA nodes are greater than or equal to
'mocaIfPhyThreshold', send this notification if
'mocaIfPhyThresholdEnable' is 'true'.

This trap is sent when 'mocaIfStatusChangeEnable' is 'true'
and 'mocaIfStatus' changes value.

This trap is sent when 'mocaIfNumNodesChangeEnable' is 'true'
and 'mocaIfNumNodes' changes value.