Specifies whether automatic generation of internal
summary address(es) based on the switch address(es) or
node ID is enabled. Automatically generated summary
addresses can only be removed by setting this object to
`false'. They cannot be removed through the
pnniSummaryTable in the ATM Forum PNNI MIB.
For lowest-level nodes with auto-summary enabled, each
switching system generates one or more 13-byte summary
address prefixes based on the switch address(es). Switch
addresses are configured in the ciscoAtmSwAddrTable.