cwn Atm Source Entry

1.3.6.1.4.1.9.9.223.1.4.1.1

Network clock status for sources of network clock identified by 'cwnClockSourceIndex' and used by the managed system when the value of 'cwnDistributionMethod' is 'ncdp'. The managed device selects one entry in this table to advertise as the best available clock source for the device. Cooperating NCDP protocol entities select the best available clock source among those advertised within the cooperating group and build a clock distribution tree rooted at that clock source. When the value of 'cwnRootClockSource' is used as an index into this table and the indicated clock source has 'cwnAtmSourceBestClockSource' with value 'true' then the indicated clock source is the root of some clock distribution tree. If only one such root exists on all participating devices in the network, then it is the root of a network wide clock distribution tree. When the managed system initializes it creates a row for the device's default source of network clock. This row cannot be destroyed by a management station. Within this row a write operation is only allowed on the 'cwnAtmSourcePriority' object. The status of this row is always active. The default source can always be found by issuing a read operation on the row within 'cwnManualSourceTable' that has 'default' as the value of 'cwnManualSourcePriority'. The other rows are created or destroyed by a management station or through the device's local management interface when a source of network clock is configured or removed. The values of 'cwnAtmSourcePriority', 'cwnAtmSourceStratum' and 'cwnAtmSourcePRSReference' collectively describe a source of network clock. They are the three components of a vector used as an input to the NCDP algorithm to make clock source selection decisions.