diff --git a/of-save/lib/gen-src/main/java/org/projectfloodlight/openflow/protocol/ver11/OFGroupModifyVer11.java b/of-save/lib/gen-src/main/java/org/projectfloodlight/openflow/protocol/ver11/OFGroupModifyVer11.java
new file mode 100644
index 0000000..1cf6650
--- /dev/null
+++ b/of-save/lib/gen-src/main/java/org/projectfloodlight/openflow/protocol/ver11/OFGroupModifyVer11.java
@@ -0,0 +1,461 @@
+// Copyright (c) 2008 The Board of Trustees of The Leland Stanford Junior University
+// Copyright (c) 2011, 2012 Open Networking Foundation
+// Copyright (c) 2012, 2013 Big Switch Networks, Inc.
+// This library was generated by the LoxiGen Compiler.
+// See the file LICENSE.txt which should have been included in the source distribution
+
+// Automatically generated by LOXI from template of_class.java
+// Do not modify
+
+package org.projectfloodlight.openflow.protocol.ver11;
+
+import org.projectfloodlight.openflow.protocol.*;
+import org.projectfloodlight.openflow.protocol.action.*;
+import org.projectfloodlight.openflow.protocol.actionid.*;
+import org.projectfloodlight.openflow.protocol.bsntlv.*;
+import org.projectfloodlight.openflow.protocol.errormsg.*;
+import org.projectfloodlight.openflow.protocol.meterband.*;
+import org.projectfloodlight.openflow.protocol.instruction.*;
+import org.projectfloodlight.openflow.protocol.instructionid.*;
+import org.projectfloodlight.openflow.protocol.match.*;
+import org.projectfloodlight.openflow.protocol.oxm.*;
+import org.projectfloodlight.openflow.protocol.queueprop.*;
+import org.projectfloodlight.openflow.types.*;
+import org.projectfloodlight.openflow.util.*;
+import org.projectfloodlight.openflow.exceptions.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import java.util.List;
+import com.google.common.collect.ImmutableList;
+import java.util.Set;
+import org.jboss.netty.buffer.ChannelBuffer;
+import com.google.common.hash.PrimitiveSink;
+import com.google.common.hash.Funnel;
+
+class OFGroupModifyVer11 implements OFGroupModify {
+    private static final Logger logger = LoggerFactory.getLogger(OFGroupModifyVer11.class);
+    // version: 1.1
+    final static byte WIRE_VERSION = 2;
+    final static int MINIMUM_LENGTH = 16;
+
+        private final static long DEFAULT_XID = 0x0L;
+        private final static OFGroup DEFAULT_GROUP_ID = OFGroup.ALL;
+        private final static List<OFBucket> DEFAULT_BUCKETS = ImmutableList.<OFBucket>of();
+
+    // OF message fields
+    private final long xid;
+    private final OFGroupType groupType;
+    private final OFGroup group;
+    private final List<OFBucket> buckets;
+//
+
+    // package private constructor - used by readers, builders, and factory
+    OFGroupModifyVer11(long xid, OFGroupType groupType, OFGroup group, List<OFBucket> buckets) {
+        this.xid = xid;
+        this.groupType = groupType;
+        this.group = group;
+        this.buckets = buckets;
+    }
+
+    // Accessors for OF message fields
+    @Override
+    public OFVersion getVersion() {
+        return OFVersion.OF_11;
+    }
+
+    @Override
+    public OFType getType() {
+        return OFType.GROUP_MOD;
+    }
+
+    @Override
+    public long getXid() {
+        return xid;
+    }
+
+    @Override
+    public OFGroupModCommand getCommand() {
+        return OFGroupModCommand.MODIFY;
+    }
+
+    @Override
+    public OFGroupType getGroupType() {
+        return groupType;
+    }
+
+    @Override
+    public OFGroup getGroup() {
+        return group;
+    }
+
+    @Override
+    public List<OFBucket> getBuckets() {
+        return buckets;
+    }
+
+
+
+    public OFGroupModify.Builder createBuilder() {
+        return new BuilderWithParent(this);
+    }
+
+    static class BuilderWithParent implements OFGroupModify.Builder {
+        final OFGroupModifyVer11 parentMessage;
+
+        // OF message fields
+        private boolean xidSet;
+        private long xid;
+        private boolean groupTypeSet;
+        private OFGroupType groupType;
+        private boolean groupSet;
+        private OFGroup group;
+        private boolean bucketsSet;
+        private List<OFBucket> buckets;
+
+        BuilderWithParent(OFGroupModifyVer11 parentMessage) {
+            this.parentMessage = parentMessage;
+        }
+
+    @Override
+    public OFVersion getVersion() {
+        return OFVersion.OF_11;
+    }
+
+    @Override
+    public OFType getType() {
+        return OFType.GROUP_MOD;
+    }
+
+    @Override
+    public long getXid() {
+        return xid;
+    }
+
+    @Override
+    public OFGroupModify.Builder setXid(long xid) {
+        this.xid = xid;
+        this.xidSet = true;
+        return this;
+    }
+    @Override
+    public OFGroupModCommand getCommand() {
+        return OFGroupModCommand.MODIFY;
+    }
+
+    @Override
+    public OFGroupType getGroupType() {
+        return groupType;
+    }
+
+    @Override
+    public OFGroupModify.Builder setGroupType(OFGroupType groupType) {
+        this.groupType = groupType;
+        this.groupTypeSet = true;
+        return this;
+    }
+    @Override
+    public OFGroup getGroup() {
+        return group;
+    }
+
+    @Override
+    public OFGroupModify.Builder setGroup(OFGroup group) {
+        this.group = group;
+        this.groupSet = true;
+        return this;
+    }
+    @Override
+    public List<OFBucket> getBuckets() {
+        return buckets;
+    }
+
+    @Override
+    public OFGroupModify.Builder setBuckets(List<OFBucket> buckets) {
+        this.buckets = buckets;
+        this.bucketsSet = true;
+        return this;
+    }
+
+
+        @Override
+        public OFGroupModify build() {
+                long xid = this.xidSet ? this.xid : parentMessage.xid;
+                OFGroupType groupType = this.groupTypeSet ? this.groupType : parentMessage.groupType;
+                if(groupType == null)
+                    throw new NullPointerException("Property groupType must not be null");
+                OFGroup group = this.groupSet ? this.group : parentMessage.group;
+                if(group == null)
+                    throw new NullPointerException("Property group must not be null");
+                List<OFBucket> buckets = this.bucketsSet ? this.buckets : parentMessage.buckets;
+                if(buckets == null)
+                    throw new NullPointerException("Property buckets must not be null");
+
+                //
+                return new OFGroupModifyVer11(
+                    xid,
+                    groupType,
+                    group,
+                    buckets
+                );
+        }
+
+    }
+
+    static class Builder implements OFGroupModify.Builder {
+        // OF message fields
+        private boolean xidSet;
+        private long xid;
+        private boolean groupTypeSet;
+        private OFGroupType groupType;
+        private boolean groupSet;
+        private OFGroup group;
+        private boolean bucketsSet;
+        private List<OFBucket> buckets;
+
+    @Override
+    public OFVersion getVersion() {
+        return OFVersion.OF_11;
+    }
+
+    @Override
+    public OFType getType() {
+        return OFType.GROUP_MOD;
+    }
+
+    @Override
+    public long getXid() {
+        return xid;
+    }
+
+    @Override
+    public OFGroupModify.Builder setXid(long xid) {
+        this.xid = xid;
+        this.xidSet = true;
+        return this;
+    }
+    @Override
+    public OFGroupModCommand getCommand() {
+        return OFGroupModCommand.MODIFY;
+    }
+
+    @Override
+    public OFGroupType getGroupType() {
+        return groupType;
+    }
+
+    @Override
+    public OFGroupModify.Builder setGroupType(OFGroupType groupType) {
+        this.groupType = groupType;
+        this.groupTypeSet = true;
+        return this;
+    }
+    @Override
+    public OFGroup getGroup() {
+        return group;
+    }
+
+    @Override
+    public OFGroupModify.Builder setGroup(OFGroup group) {
+        this.group = group;
+        this.groupSet = true;
+        return this;
+    }
+    @Override
+    public List<OFBucket> getBuckets() {
+        return buckets;
+    }
+
+    @Override
+    public OFGroupModify.Builder setBuckets(List<OFBucket> buckets) {
+        this.buckets = buckets;
+        this.bucketsSet = true;
+        return this;
+    }
+//
+        @Override
+        public OFGroupModify build() {
+            long xid = this.xidSet ? this.xid : DEFAULT_XID;
+            if(!this.groupTypeSet)
+                throw new IllegalStateException("Property groupType doesn't have default value -- must be set");
+            if(groupType == null)
+                throw new NullPointerException("Property groupType must not be null");
+            OFGroup group = this.groupSet ? this.group : DEFAULT_GROUP_ID;
+            if(group == null)
+                throw new NullPointerException("Property group must not be null");
+            List<OFBucket> buckets = this.bucketsSet ? this.buckets : DEFAULT_BUCKETS;
+            if(buckets == null)
+                throw new NullPointerException("Property buckets must not be null");
+
+
+            return new OFGroupModifyVer11(
+                    xid,
+                    groupType,
+                    group,
+                    buckets
+                );
+        }
+
+    }
+
+
+    final static Reader READER = new Reader();
+    static class Reader implements OFMessageReader<OFGroupModify> {
+        @Override
+        public OFGroupModify readFrom(ChannelBuffer bb) throws OFParseError {
+            int start = bb.readerIndex();
+            // fixed value property version == 2
+            byte version = bb.readByte();
+            if(version != (byte) 0x2)
+                throw new OFParseError("Wrong version: Expected=OFVersion.OF_11(2), got="+version);
+            // fixed value property type == 15
+            byte type = bb.readByte();
+            if(type != (byte) 0xf)
+                throw new OFParseError("Wrong type: Expected=OFType.GROUP_MOD(15), got="+type);
+            int length = U16.f(bb.readShort());
+            if(length < MINIMUM_LENGTH)
+                throw new OFParseError("Wrong length: Expected to be >= " + MINIMUM_LENGTH + ", was: " + length);
+            if(bb.readableBytes() + (bb.readerIndex() - start) < length) {
+                // Buffer does not have all data yet
+                bb.readerIndex(start);
+                return null;
+            }
+            if(logger.isTraceEnabled())
+                logger.trace("readFrom - length={}", length);
+            long xid = U32.f(bb.readInt());
+            // fixed value property command == 1
+            short command = bb.readShort();
+            if(command != (short) 0x1)
+                throw new OFParseError("Wrong command: Expected=OFGroupModCommand.MODIFY(1), got="+command);
+            OFGroupType groupType = OFGroupTypeSerializerVer11.readFrom(bb);
+            // pad: 1 bytes
+            bb.skipBytes(1);
+            OFGroup group = OFGroup.read4Bytes(bb);
+            List<OFBucket> buckets = ChannelUtils.readList(bb, length - (bb.readerIndex() - start), OFBucketVer11.READER);
+
+            OFGroupModifyVer11 groupModifyVer11 = new OFGroupModifyVer11(
+                    xid,
+                      groupType,
+                      group,
+                      buckets
+                    );
+            if(logger.isTraceEnabled())
+                logger.trace("readFrom - read={}", groupModifyVer11);
+            return groupModifyVer11;
+        }
+    }
+
+    public void putTo(PrimitiveSink sink) {
+        FUNNEL.funnel(this, sink);
+    }
+
+    final static OFGroupModifyVer11Funnel FUNNEL = new OFGroupModifyVer11Funnel();
+    static class OFGroupModifyVer11Funnel implements Funnel<OFGroupModifyVer11> {
+        private static final long serialVersionUID = 1L;
+        @Override
+        public void funnel(OFGroupModifyVer11 message, PrimitiveSink sink) {
+            // fixed value property version = 2
+            sink.putByte((byte) 0x2);
+            // fixed value property type = 15
+            sink.putByte((byte) 0xf);
+            // FIXME: skip funnel of length
+            sink.putLong(message.xid);
+            // fixed value property command = 1
+            sink.putShort((short) 0x1);
+            OFGroupTypeSerializerVer11.putTo(message.groupType, sink);
+            // skip pad (1 bytes)
+            message.group.putTo(sink);
+            FunnelUtils.putList(message.buckets, sink);
+        }
+    }
+
+
+    public void writeTo(ChannelBuffer bb) {
+        WRITER.write(bb, this);
+    }
+
+    final static Writer WRITER = new Writer();
+    static class Writer implements OFMessageWriter<OFGroupModifyVer11> {
+        @Override
+        public void write(ChannelBuffer bb, OFGroupModifyVer11 message) {
+            int startIndex = bb.writerIndex();
+            // fixed value property version = 2
+            bb.writeByte((byte) 0x2);
+            // fixed value property type = 15
+            bb.writeByte((byte) 0xf);
+            // length is length of variable message, will be updated at the end
+            int lengthIndex = bb.writerIndex();
+            bb.writeShort(U16.t(0));
+
+            bb.writeInt(U32.t(message.xid));
+            // fixed value property command = 1
+            bb.writeShort((short) 0x1);
+            OFGroupTypeSerializerVer11.writeTo(bb, message.groupType);
+            // pad: 1 bytes
+            bb.writeZero(1);
+            message.group.write4Bytes(bb);
+            ChannelUtils.writeList(bb, message.buckets);
+
+            // update length field
+            int length = bb.writerIndex() - startIndex;
+            bb.setShort(lengthIndex, length);
+
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder b = new StringBuilder("OFGroupModifyVer11(");
+        b.append("xid=").append(xid);
+        b.append(", ");
+        b.append("groupType=").append(groupType);
+        b.append(", ");
+        b.append("group=").append(group);
+        b.append(", ");
+        b.append("buckets=").append(buckets);
+        b.append(")");
+        return b.toString();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        OFGroupModifyVer11 other = (OFGroupModifyVer11) obj;
+
+        if( xid != other.xid)
+            return false;
+        if (groupType == null) {
+            if (other.groupType != null)
+                return false;
+        } else if (!groupType.equals(other.groupType))
+            return false;
+        if (group == null) {
+            if (other.group != null)
+                return false;
+        } else if (!group.equals(other.group))
+            return false;
+        if (buckets == null) {
+            if (other.buckets != null)
+                return false;
+        } else if (!buckets.equals(other.buckets))
+            return false;
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+
+        result = prime *  (int) (xid ^ (xid >>> 32));
+        result = prime * result + ((groupType == null) ? 0 : groupType.hashCode());
+        result = prime * result + ((group == null) ? 0 : group.hashCode());
+        result = prime * result + ((buckets == null) ? 0 : buckets.hashCode());
+        return result;
+    }
+
+}