[VOL-2778] Handling IGMP

Change-Id: I54c26bc438a144c7d4c64a9b3d543461fc743ab2
diff --git a/api/bbsim/bbsim.proto b/api/bbsim/bbsim.proto
index 7a67c85..da329f7 100644
--- a/api/bbsim/bbsim.proto
+++ b/api/bbsim/bbsim.proto
@@ -63,6 +63,7 @@
     string EapolState = 10;
     string DhcpState = 11;
     string InternalState = 12;
+    string IGMPState = 13;
 }
 
 message ONUTrafficSchedulers {