WITS: Auckland II

Trace Format Legacy ATM, captured using a DAG 2 card.
Volume on Disk 27 GB
Number of Traces 85
Capture Start (Local) Mon Nov 29 13:42:58 1999
Capture End (Local) Mon Jul 3 18:34:36 2000
Total Duration 24 Days, 7 Hours, 0 Minutes and 15 Seconds
Packets Captured 996 million
Total Traffic 359 GB
Contiguity None
Snapping Method Fixed-length 64 byte truncation.
Rotation Policy No file rotation
Anonymization IP addresses replaced using one-to-one mapping into 10.*.*.* address space
Download Link
Download Link (RIPE repository)

NOTE: The traces released here are NOT the traces that were originally released by NLANR. The NLANR release featured a bug in the anonymisation technique that meant that multiple real-world IP addresses were mapped to the same anonymised address. The traces on this page have been re-anonymised from the original captures using a corrected anonymisation tool.

We have retained the traces that were released by NLANR, although we strongly recommend against using them. They can be accessed from here.


This is a collection of long GPS-synchronized traces taken using a pair of DAG 2 cards at the University of Auckland. Most traces were targeted at 24 hour runs, but hardware failures have resulted in most traces being significantly shorter. The first trace taken is much longer, with over 1 and a half days of traffic.

The tap was installed at an OC3 link carrying various Classical-IP-over-ATM, LANE and POTS services. The trace contains all the IP headers of a single VPI/VCI pair, which connects the University to its ISP. A cap for 2MBits/sec peak packet rate is set in each direction. All external connections from the University have to pass through the measurement point. Additionally, traffic across a LANE connection to an offsite campus is included in the trace.

Each trace file is named using the following format: yyyymmdd-HHMMSS-[direction].gz. The time and date refers to the local time when the capture was started. The direction refers to which half of the link is contained within the trace. Direction 0 is traffic coming into the University and direction 1 is traffic originating from the University.

All non-IP traffic has been discarded and only TCP, UDP and ICMP traffic is present in the trace. Any user payload within the 64 byte capture record has been zeroed.

The IP addresses in the traces have been replaced using a one-to-one mapping into the 10.0.0.0/8 address space. Each anonymised address was assigned sequentially so the first real-world address observed is mapped to 10.0.0.1, the next new address is 10.0.0.2 and so on. The mapping database was preserved across the entire trace set.

The recommended method for processing these traces is to use Libtrace, which we have developed. There are a number of tools included with libtrace such as a packet dumping utility, a trace format converter (for example, to convert to pcap), a trace splitting/filtering tool and a few statistic generators. We suggest you examine the Libtrace Wiki for more details on the Libtrace tools and the library itself.

Acknowledgements: Some of the information presented on this page has been sourced from the NLANR page about this traceset.

Name Local Start Time Duration Total Packets Compressed Size
19991129-134258-0 Mon Nov 29 13:42:58 1999 38:29:08 30 million 878 MB
19991129-134258-1 Mon Nov 29 13:42:58 1999 38:30:59 28 million 806 MB
19991201-192548-0 Wed Dec 1 19:25:48 1999 24:03:20 16 million 487 MB
19991201-192548-1 Wed Dec 1 19:25:48 1999 24:02:58 15 million 451 MB
19991207-125019-0 Tue Dec 7 12:50:19 1999 13:36:08 9 million 286 MB
19991207-125019-1 Tue Dec 7 12:50:19 1999 13:36:08 9 million 266 MB
19991208-125838-0 Wed Dec 8 12:58:38 1999 2:18:59 2 million 79 MB
19991208-125838-1 Wed Dec 8 12:58:38 1999 2:18:59 2 million 75 MB
19991209-151701-0 Thu Dec 9 15:17:01 1999 24:02:32 19 million 531 MB
19991209-151701-1 Thu Dec 9 15:17:01 1999 24:02:10 16 million 445 MB
20000107-093027-0 Fri Jan 7 09:30:28 2000 21:50:41 14 million 401 MB
20000107-093027-1 Fri Jan 7 09:30:28 2000 21:50:41 13 million 362 MB
20000112-111915-0 Wed Jan 12 11:19:15 2000 11:16:33 11 million 321 MB
20000112-111915-1 Wed Jan 12 11:19:15 2000 11:24:38 11 million 326 MB
20000114-125102-0 Fri Jan 14 12:51:02 2000 24:03:33 12 million 352 MB
20000114-125102-1 Fri Jan 14 12:51:02 2000 24:03:21 12 million 335 MB
20000117-095016-0 Mon Jan 17 09:50:16 2000 21:56:58 15 million 423 MB
20000117-095016-1 Mon Jan 17 09:50:16 2000 21:56:58 13 million 388 MB
20000125-143640-0 Tue Jan 25 14:36:40 2000 3:11:28 3 million 108 MB
20000125-143640-1 Tue Jan 25 14:36:40 2000 3:11:28 3 million 104 MB
20000126-205741-0 Wed Jan 26 20:57:41 2000 19:36:57 14 million 428 MB
20000126-205741-1 Wed Jan 26 20:57:41 2000 19:37:00 15 million 443 MB
20000128-160441-0 Fri Jan 28 16:04:41 2000 24:02:04 10 million 304 MB
20000128-160441-1 Fri Jan 28 16:04:41 2000 24:01:22 11 million 320 MB
20000201-092542-0 Tue Feb 1 09:25:42 2000 20:24:03 15 million 458 MB
20000201-092542-1 Tue Feb 1 09:25:42 2000 20:24:03 16 million 471 MB
20000203-112952-0 Thu Feb 3 11:29:52 2000 5:15:45 6 million 195 MB
20000203-112952-1 Thu Feb 3 11:29:52 2000 5:15:45 6 million 193 MB
20000204-183800-0 Fri Feb 4 18:38:01 2000 6:15:22 3 million 101 MB
20000204-183800-1 Fri Feb 4 18:38:01 2000 6:28:18 4 million 122 MB
20000207-105633-0 Mon Feb 7 10:56:33 2000 16:15:05 13 million 377 MB
20000207-105633-1 Mon Feb 7 10:56:33 2000 16:15:05 12 million 362 MB
20000210-143332-0 Thu Feb 10 14:33:32 2000 7:46:50 6 million 203 MB
20000210-143332-1 Thu Feb 10 14:33:32 2000 7:46:50 6 million 196 MB
20000214-185536-0 Mon Feb 14 18:55:36 2000 3:13:53 1 million 52 MB
20000214-185536-1 Mon Feb 14 18:55:36 2000 3:13:53 1 million 50 MB
20000215-160554-0 Tue Feb 15 16:05:54 2000 6:29:14 5 million 153 MB
20000215-160554-1 Tue Feb 15 16:05:54 2000 6:16:20 4 million 141 MB
20000216-175921-0 Wed Feb 16 17:59:21 2000 2:31:09 1 million 40 MB
20000216-175921-1 Wed Feb 16 17:59:21 2000 2:31:09 1 million 39 MB
20000221-150849-0 Mon Feb 21 15:08:49 2000 20:06:50 14 million 404 MB
20000221-150849-1 Mon Feb 21 15:08:49 2000 20:06:50 14 million 392 MB
20000223-204649-0 Wed Feb 23 20:46:49 2000 9:37:29 4 million 129 MB
20000223-204649-1 Wed Feb 23 20:46:49 2000 9:37:29 4 million 118 MB
20000225-185049-0 Fri Feb 25 18:50:49 2000 6:03:03 3 million 96 MB
20000225-185049-1 Fri Feb 25 18:50:49 2000 6:03:03 3 million 97 MB
20000228-133235-0 Mon Feb 28 13:32:35 2000 14:21:41 11 million 334 MB
20000228-133235-1 Mon Feb 28 13:32:35 2000 14:21:41 11 million 336 MB
20000301-173237-0 Wed Mar 1 17:32:37 2000 15:54:05 10 million 303 MB
20000301-173237-1 Wed Mar 1 17:32:37 2000 15:54:05 10 million 307 MB
20000303-120046-0 Fri Mar 3 12:00:46 2000 6:33:06 8 million 254 MB
20000303-120046-1 Fri Mar 3 12:00:46 2000 6:33:06 8 million 251 MB
20000308-122923-0 Wed Mar 8 12:29:23 2000 15:21:53 14 million 435 MB
20000308-122923-1 Wed Mar 8 12:29:23 2000 15:21:38 15 million 434 MB
20000315-190614-0 Wed Mar 15 19:06:14 2000 16:34:13 12 million 378 MB
20000315-190614-1 Wed Mar 15 19:06:14 2000 16:34:13 12 million 365 MB
20000322-100657-0 Wed Mar 22 10:06:57 2000 6:00:00 9 million 279 MB
20000322-100657-1 Wed Mar 22 10:06:57 2000 6:00:00 9 million 267 MB
20000327-194854-0 Mon Mar 27 19:48:54 2000 3:19:41 3 million 101 MB
20000327-194854-1 Mon Mar 27 19:48:54 2000 3:19:41 3 million 104 MB
20000406-111450-0 Thu Apr 6 11:14:50 2000 24:00:48 33 million 980 MB
20000406-111450-1 Thu Apr 6 11:14:50 2000 24:00:46 31 million 913 MB
20000504-125919-0 Thu May 4 12:59:19 2000 24:01:01 28 million 851 MB
20000504-125919-1 Thu May 4 12:59:19 2000 24:00:53 28 million 845 MB
20000515-160055-0 Mon May 15 16:00:55 2000 16:25:24 14 million 423 MB
20000515-160055-1 Mon May 15 16:00:55 2000 16:25:24 14 million 436 MB
20000518-111548-0 Thu May 18 11:15:48 2000 1:48:00 4 million 121 MB
20000518-111548-1 Thu May 18 11:15:48 2000 1:48:00 3 million 116 MB
20000607-133827-0 Wed Jun 7 13:38:27 2000 3:26:20 7 million 233 MB
20000607-133827-1 Wed Jun 7 13:38:27 2000 3:26:20 7 million 225 MB
20000609-143638-0 Fri Jun 9 14:36:38 2000 20:40:35 20 million 587 MB
20000609-143638-1 Fri Jun 9 14:36:38 2000 20:40:35 19 million 577 MB
20000614-181539-0 Wed Jun 14 18:15:39 2000 18:02:03 19 million 568 MB
20000614-181539-1 Wed Jun 14 18:15:39 2000 18:01:50 18 million 546 MB
20000619-183717-0 Mon Jun 19 18:37:17 2000 24:01:37 27 million 799 MB
20000619-183717-1 Mon Jun 19 18:37:17 2000 24:01:19 27 million 783 MB
20000621-105006-0 Wed Jun 21 10:50:06 2000 7:19:23 14 million 419 MB
20000621-105006-1 Wed Jun 21 10:50:06 2000 7:19:23 13 million 392 MB
20000627-213007-0 Tue Jun 27 21:30:08 2000 1:38:09 1 million 32 MB
20000627-213007-1 Tue Jun 27 21:30:08 2000 1:38:09 1 million 33 MB
20000629-165253-0 Thu Jun 29 16:52:53 2000 8:14:13 7 million 202 MB
20000629-165253-1 Thu Jun 29 16:52:53 2000 8:14:13 6 million 184 MB
20000630-175712-0 Fri Jun 30 17:57:12 2000 19:26:05 11 million 329 MB
20000630-175712-1 Fri Jun 30 17:57:12 2000 19:26:05 10 million 301 MB
20000703-152100-0 Mon Jul 3 15:21:00 2000 3:13:36 11 million 276 MB