*** 559,564 ****
--- 559,565 ----
      ifp->if_name = "ep";
      ifp->if_mtu = ETHERMTU;
      ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
+     ifp->if_flags |= IFF_MULTICAST;
      ifp->if_init = epinit;
      ifp->if_output = ether_output;
      ifp->if_start = epstart;
***************
*** 1336,1341 ****
--- 1337,1363 ----
                        ifp->if_mtu = ifr->ifr_mtu; 
                }
                break;  
+ 
+       case SIOCADDMULTI:
+       case SIOCDELMULTI:
+       /*
+        * Update our multicast listeners
+        */
+       if (cmd == SIOCADDMULTI) {
+           ether_addmulti(ifr, &sc->arpcom);
+       } else {
+           ether_delmulti(ifr, &sc->arpcom);
+       }
+ 
+       if (error == ENETRESET) {
+           /*
+            * Multicast list has changed; set the
+            * hardware filter accordingly
+            */
+           epreset(ifp->if_unit);
+           error = 0;
+       }
+       break;
  
        default:
                error = EINVAL;