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6) After selecting commit button, refresh the page. After refresh we can see that updated LanMode parameter data will be updatevalue.

7)LanMode data-model info from CPE device(BPIR4) after modification from ACS.

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Acs server is taking time to update all the parameters at initial and also we can see a highlighted info as "device is offline" when we edit any data-model value from acs server, but in background data gets updated. 
Jira for this bug: