[vs] Set mto only on tap device (#592)

Author: kcudnik

vslib/src/SwitchStateBase.cpp

@@ -403,9 +403,7 @@ sai_status_t SwitchStateBase::setPort(
         {
             SWSS_LOG_INFO("setting new MTU: %d on %s", mtu, name.c_str());
 
-            std::string vname = vs_get_veth_name(name, portId);
-
-            if (vs_set_dev_mtu(name.c_str(), mtu) < 0 || vs_set_dev_mtu(vname.c_str(), mtu) < 0)
+            if (vs_set_dev_mtu(name.c_str(), mtu) < 0)
             {
                 SWSS_LOG_ERROR("failed to set MTU on portId %s",
                     sai_serialize_object_id(portId).c_str());

vslib/src/SwitchStateBaseHostif.cpp

@@ -657,7 +657,6 @@ sai_status_t SwitchStateBase::vs_create_hostif_tap_interface(
     }
 
     vs_set_dev_mtu(name.c_str(), mtu);
-    vs_set_dev_mtu(vname.c_str(), mtu);
 
     if (!hostif_create_tap_veth_forwarding(name, tapfd, obj_id))
     {