diff --git a/print-slow.c b/print-slow.c
new file mode 100644
index 0000000..9609922
--- /dev/null
+++ b/print-slow.c
@@ -0,0 +1,264 @@
+/*
+ * Copyright (c) 1998-2005 The TCPDUMP project
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code
+ * distributions retain the above copyright notice and this paragraph
+ * in its entirety, and (2) distributions including binary code include
+ * the above copyright notice and this paragraph in its entirety in
+ * the documentation or other materials provided with the distribution.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
+ * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+ * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE.
+ *
+ * support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad
+ *
+ * Original code by Hannes Gredler (hannes@juniper.net)
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-slow.c,v 1.1.2.1 2005/07/10 14:47:56 hannes Exp $";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "interface.h"
+#include "extract.h"
+#include "addrtoname.h"
+#include "ether.h"
+
+struct slow_common_header {
+    u_int8_t proto_subtype;
+    u_int8_t version;
+};
+
+#define	SLOW_PROTO_LACP                     1
+#define	SLOW_PROTO_MARKER                   2
+
+#define	LACP_VERSION                        1
+#define	MARKER_VERSION                      1
+
+static const struct tok slow_proto_values[] = {
+    { SLOW_PROTO_LACP, "LACP" },
+    { SLOW_PROTO_MARKER, "MARKER" },
+    { 0, NULL}
+};
+
+struct tlv_header_t {
+    u_int8_t type;
+    u_int8_t length;
+};
+
+#define LACP_TLV_TERMINATOR     0x00
+#define LACP_TLV_ACTOR_INFO     0x01
+#define LACP_TLV_PARTNER_INFO   0x02
+#define LACP_TLV_COLLECTOR_INFO 0x03
+
+#define MARKER_TLV_TERMINATOR   0x00
+#define MARKER_TLV_MARKER_INFO  0x01
+
+static const struct tok slow_tlv_values[] = {
+    { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"},
+    { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"},
+    { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"},
+    { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"},
+
+    { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"},
+    { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"},
+    { 0, NULL}
+};
+
+struct lacp_tlv_actor_partner_info_t {
+    u_int8_t sys_pri[2];
+    u_int8_t sys[ETHER_ADDR_LEN];
+    u_int8_t key[2];
+    u_int8_t port_pri[2];
+    u_int8_t port[2];
+    u_int8_t state;
+    u_int8_t pad[3];
+};          
+
+static const struct tok lacp_tlv_actor_partner_info_state_values[] = {
+    { 0x01, "Activity"},
+    { 0x02, "Timeout"},
+    { 0x04, "Aggregation"},
+    { 0x08, "Synchronization"},
+    { 0x10, "Collecting"},
+    { 0x20, "Distributing"},
+    { 0x40, "Default"},
+    { 0x80, "Expired"},
+    { 0, NULL}
+};
+
+struct lacp_tlv_collector_info_t {
+    u_int8_t max_delay[2];
+    u_int8_t pad[12];
+}; 
+
+struct marker_tlv_marker_info_t {
+    u_int8_t req_port[2];
+    u_int8_t req_sys[ETHER_ADDR_LEN];
+    u_int8_t req_trans_id[4];
+    u_int8_t pad[2];
+}; 
+
+struct lacp_marker_tlv_terminator_t {
+    u_int8_t pad[50];
+}; 
+
+void
+slow_print(register const u_char *pptr, register u_int len) {
+
+    const struct slow_common_header *slow_com_header;
+    const struct tlv_header_t *tlv_header;
+    const u_char *tptr,*tlv_tptr;
+    u_int tlv_len,tlen,tlv_tlen;
+
+    union {
+        const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator;
+        const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info;
+        const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info;
+        const struct marker_tlv_marker_info_t *marker_tlv_marker_info;
+    } tlv_ptr;
+
+    tptr=pptr;
+    slow_com_header = (const struct slow_common_header *)pptr;
+    TCHECK(*slow_com_header);
+
+    /*
+     * Sanity checking of the header.
+     */
+    if (slow_com_header->proto_subtype == SLOW_PROTO_LACP &&
+        slow_com_header->version != LACP_VERSION) {
+	printf("LACP version %u packet not supported",slow_com_header->version);
+	return;
+    }
+    if (slow_com_header->proto_subtype == SLOW_PROTO_MARKER &&
+        slow_com_header->version != MARKER_VERSION) {
+	printf("MARKER version %u packet not supported",slow_com_header->version);
+	return;
+    }
+
+    printf("%sv%u, length: %u",
+           tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype),
+           slow_com_header->version,
+           len);
+
+    if (!vflag)
+        return;
+
+    /* ok they seem to want to know everything - lets fully decode it */
+    tlen=len-sizeof(struct slow_common_header);
+    tptr+=sizeof(const struct slow_common_header);
+
+    while(tlen>0) {
+        /* did we capture enough for fully decoding the tlv header ? */
+        TCHECK2(*tptr, sizeof(struct tlv_header_t));
+        tlv_header = (const struct tlv_header_t *)tptr;
+        tlv_len = tlv_header->length;
+
+        printf("\n\t%s TLV (0x%02x), length: %u",
+               tok2str(slow_tlv_values,
+                       "Unknown",
+                       (slow_com_header->proto_subtype << 8) + tlv_header->type),
+               tlv_header->type,
+               tlv_len);
+
+        if ((tlv_len < sizeof(struct tlv_header_t) ||
+            tlv_len > tlen) &&
+            tlv_header->type != LACP_TLV_TERMINATOR &&
+            tlv_header->type != MARKER_TLV_TERMINATOR) {
+            printf("\n\t-----trailing data-----");
+            print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",tlen);
+            return;
+        }
+
+        tlv_tptr=tptr+sizeof(struct tlv_header_t);
+        tlv_tlen=tlv_len-sizeof(struct tlv_header_t);
+
+        /* did we capture enough for fully decoding the tlv ? */
+        TCHECK2(*tptr, tlv_len);
+
+        switch((slow_com_header->proto_subtype << 8) + tlv_header->type) {
+
+            /* those two TLVs have the same structure -> fall through */
+        case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO):
+        case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO):
+            tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr;
+
+            printf("\n\t  System %s, System Priority %u, Key %u" \
+                   ", Port %u, Port Priority %u\n\t  State Flags [%s]",
+                   etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys),
+                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri),
+                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key),
+                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port),
+                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri),
+                   bittok2str(lacp_tlv_actor_partner_info_state_values,
+                              "none",
+                              tlv_ptr.lacp_tlv_actor_partner_info->state));
+
+            break;
+
+        case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO):
+            tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr;
+
+            printf("\n\t  Max Delay %u",
+                   EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay));
+
+            break;
+
+        case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO):
+            tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr;
+
+            printf("\n\t  Request System %s, Request Port %u, Request Transaction ID 0x%08x",
+                   etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys),
+                   EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port),
+                   EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id));
+
+            break;
+
+            /* those two TLVs have the same structure -> fall through */
+        case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR):
+        case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR):
+            tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr;
+            if (tlv_len == 0) {
+                tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) +
+                    sizeof(struct tlv_header_t);
+                /* tell the user that we modified the length field  */
+                if (vflag>1)
+                    printf(" (=%u)",tlv_len);
+                /* we have messed around with the length field - now we need to check
+                 * again if there are enough bytes on the wire for the hexdump */
+                TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0],
+                        sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad));
+            }
+
+            break;
+
+        default:
+            if (vflag <= 1)
+                print_unknown_data(tlv_tptr,"\n\t  ",tlv_tlen);
+            break;
+        }
+        /* do we want to see an additionally hexdump ? */
+        if (vflag > 1)
+            print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t  ",
+                               tlv_len-sizeof(struct tlv_header_t));
+
+        tptr+=tlv_len;
+        tlen-=tlv_len;
+    }
+    return;
+trunc:
+    printf("\n\t\t packet exceeded snapshot");
+}