per d-a-v/W5500lwIP#17 (comment)

d-a-v · Jun 3, 2020 · 8b81709 · 8b81709
1 parent 50d9e83
commit 8b81709
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/cores/esp8266/lwIPIntfDev.h b/cores/esp8266/lwIPIntfDev.h
@@ -129,7 +129,9 @@ boolean LwipIntfDev<RawDev>::begin (const uint8_t* macAddress, uint16_t mtu)
         memset(_macAddress, 0, 6);
         _macAddress[0] = 0xEE;
 #endif
-        _macAddress[3] += _netif.num;
+        _macAddress[3] += _netif.num;   // alter base mac address
+        _macAddress[0] &= 0xfe;         // set as locally administered, unicast, per
+        _macAddress[0] |= 0x02;         // https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local
     }
 
     if (!RawDev::begin(_macAddress))