BCS Authentication issues Login failed for user NT Authority\ANONYMOUS LOGON or access denied by Business Data Connectivity

I created a external content type to import SQL  server table data into SharePoint 2010 list, i got couple of errors  as below

you need to give permission to users

Open Central Admin — Application Management — Manage Service Applications — Business Data Connectivity Service and select the check box next to the content type that we just created and then click “Set Object Permissions”. Add the users –  in my case all authenticated windows users see below or specific user if u want

when i refresh the list i see the error msg says

“Login failed for user ‘NT Authority\ANONYMOUS LOGON”

then i read some blog posts and they suggested its authentication issue of BCS when communicating with  external systems and configured as   using claims or default  windows authentication providers

when external content type is created using SPD 2010 default authentication mode is “User’s Identity” to get rid off above error i changed  the Authentication Mode from “User’s Identity” to “BDC Identity”

then other new error msg displayed says – meta data object has a property with name ‘AuthenticationMode’ and value ‘RevertToSelf’ etc….

We have to first enable BCS model to accept “RevertToSelf” as one of the authentication modes.
The “ReverToSelfAllowed” property is set to false by default. to change true i ran below power shell script in management shell

$bdc = Get-SPServiceApplication | where {$_ -match “Business Data Connectivity Service”};
$bdc.RevertToSelfAllowed = $true;
$bdc.Update();

i can now successfully read the list items.. add,delete etc

Ref:  Link1  , Link2