Hi Sivaraman,<br /><br />We did this recently in project mu, trying to find exactly the changes needed but I recall the following:<br /><br />
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<li>Mac Address needs to be programmed before network stack fully loads (pretty sure I only got it working in DXE), possible to add changes from this PR and have an event callback to set mac address
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<li>Event <a href="https://github.com/microsoft/mu_basecore/commit/7dc143d594bfef6d2a2a24b10b96e1258a15a344">Add a named event that is signalled when Snp-&gt;Initialize() is executed. &middot; microsoft/mu_basecore@7dc143d (github.com)</a></li>
<li>DXE Driver code to handle the Mac programming when the SNP is installed&nbsp;<a href="https://github.com/microsoft/mu_plus/pull/109/files#diff-f4bb037877470a0fc3e2f6587ad1295370ce78febdbc49a12fe65fe4b52fb80d">Add MacEmulationDxe Support by Erich-McMillan &middot; Pull Request #109 &middot; microsoft/mu_plus (github.com)</a>
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<li>If you don't take this driver as is be very careful to copy the TPL levels from event handers not doing this will cause issues</li>
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</li>
</ol>
</li>
<li>This change to reload the Snp info in ARP might be needed too&nbsp;<a href="https://github.com/microsoft/mu_basecore/commit/2b8ad03c5de4113ffbe85f5301daaad6c9c980e2">ArpDriver: refetch Snp Mode data after running MnpConfigure &middot; microsoft/mu_basecore@2b8ad03 (github.com)</a></li>
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Let me know if you have any issues/questions. Its been a while since I looked at this code.<br /><br />-Erich