diff --git a/sys/fs/nfsserver/nfs_nfsdkrpc.c b/sys/fs/nfsserver/nfs_nfsdkrpc.c
--- a/sys/fs/nfsserver/nfs_nfsdkrpc.c
+++ b/sys/fs/nfsserver/nfs_nfsdkrpc.c
@@ -550,6 +550,12 @@
 			    NULL);
 		if (so->so_type == SOCK_STREAM)
 			svc_loss_reg(xprt, nfssvc_loss);
+		if (so->so_type == SOCK_STREAM) {
+			int optval;
+
+			(void)so_setsockopt(so, IPPROTO_TCP, TCP_USE_DDP,
+			    &optval, sizeof(optval));
+		}
 		SVC_RELEASE(xprt);
 	} else
 		error = EPERM;
diff --git a/sys/rpc/clnt.h b/sys/rpc/clnt.h
--- a/sys/rpc/clnt.h
+++ b/sys/rpc/clnt.h
@@ -362,6 +362,7 @@
 	void	*arg;
 };
 #define	CLSET_RECONUPCALL	33	/* Reconnect upcall */
+#define	CLSET_DDP		34	/* set TCP_USE_DDP for socket */
 #endif
 
 
diff --git a/sys/rpc/clnt_rc.c b/sys/rpc/clnt_rc.c
--- a/sys/rpc/clnt_rc.c
+++ b/sys/rpc/clnt_rc.c
@@ -42,6 +42,8 @@
 #include <sys/time.h>
 #include <sys/uio.h>
 
+#include <netinet/tcp.h>
+
 #include <rpc/rpc.h>
 #include <rpc/rpc_com.h>
 #include <rpc/krpc.h>
@@ -106,6 +108,7 @@
 	rc->rc_closed = FALSE;
 	rc->rc_ucred = crdup(curthread->td_ucred);
 	rc->rc_client = NULL;
+	rc->rc_ddp = false;
 	rc->rc_tls = false;
 	rc->rc_tlscertname = NULL;
 	rc->rc_reconcall = NULL;
@@ -212,6 +215,12 @@
 				goto out;
 			}
 		}
+		if (rc->rc_ddp && newclient != NULL) {
+			int optval = 1;
+
+			(void)so_setsockopt(so, IPPROTO_TCP, TCP_USE_DDP,
+			    &optval, sizeof(optval));
+		}
 		if (newclient != NULL && rc->rc_reconcall != NULL)
 			(*rc->rc_reconcall)(newclient, rc->rc_reconarg,
 			    rc->rc_ucred);
@@ -522,6 +531,10 @@
 		rc->rc_reconarg = upcp->arg;
 		break;
 
+	case CLSET_DDP:
+		rc->rc_ddp = true;
+		break;
+
 	default:
 		return (FALSE);
 	}
diff --git a/sys/rpc/krpc.h b/sys/rpc/krpc.h
--- a/sys/rpc/krpc.h
+++ b/sys/rpc/krpc.h
@@ -77,6 +77,7 @@
 	CLIENT*			rc_client; /* underlying RPC client */
 	struct rpc_err		rc_err;
 	void			*rc_backchannel;
+	bool			rc_ddp;
 	bool			rc_tls; /* Enable TLS on connection */
 	char			*rc_tlscertname;
 	void			(*rc_reconcall)(CLIENT *, void *,