icwmp/docs/guide/spv_restart.md
2023-04-14 10:31:08 +00:00

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# Handling of SPV and restart services
In case `icwmpd` receives SetParameterValues Request from the ACS, it will use the `set` ubus method of bbfdmd daemon(bbf ubus object), for all requested parameters.
Based on the response of set the icwmp will do the following:
- in case of fault icwmp aborts the set of all parameters and then sends Response to the ACS with FAULT 9003 including all parameters faults as defined in TR069 standard.
- in case of success icwmp commits the set of all parameters, without applying them so without restarting services, and then sends a success Response to the ACS including the status code 1.
- All required services(whose configuration has been modified by SPV) are restarted at the end of CWMP session in order to prevent any session interruption.
!!! note
icwmp always returns 1 as status value in case of success of SPV because all services are restarted at the end of the session.