Subcategory: Application or E-business Performance
|Overview:||AppResponse Xpert uniquely combines end-user experience monitoring and in-depth analysis of the behavior and performance of the underlying network. It leverages the network's central role as a conduit for data and transactions to obtain complete visibility of IT services across the enterprise.|
|Access:||$$$ Contact OPNET at http://www.opnet.com/corporate/contact.html|
|Overview:||Measure application performance against response time and traffic requirements. Rates user impact and business transaction response time (using SQL verb signature matching).|
|Contact:||Bjorn Frogner ( firstname.lastname@example.org )|
NetPredict suites contains two tools-- NetPredictor and NetCalibrator,
they work in tandem as one suite.
NetCalibrator captures packets and performs a variety of statistical analysis such as network latency (RTT), packet interarrival time and packet loss. NetPredictor provides high level displays for decision making. It takes the result from NetCalibrator as input and displays a breakdown of delays. NetPredictor shows the delays by network node (client, server, router) and by delay component (packet loss, serialization, travel time).
The NetPredict suite runs only in Windows and is used for troubleshooting as well as continuous real-time monitoring of end-to-end applications.
Subcategory: Bandwidth / Throughput Measurement
|Contact:||Author: Pierre Beyssac ( pb @ fasterix.freenix.fr )|
|Overview:||Bing is a point-to-point bandwidth measurement tool (hence the 'b'), based on ping. Bing determines the real (raw, as opposed to available or average) throughput on a link by measuring ICMP echo requests roundtrip times for different packet sizes for each end of the link.|
|Access:||Original page is no longer maintained. A mirror exists for Bing 1.3.5.|
|Contact:||Author: Bob Carter ( carter @ cs.bu.edu )|
|Overview:||bprobe estimates the maximum possible bandwidth
along a given path. cprobe estimates the
current congestion along a path.
Currently these tools rely on two features of the IRIX operating
system for SGI hardware:
|Access:||SGI Irix only. Freely downloadable.|
|Contact:||Author: Allen B. Downey ( email@example.com )|
A reimplementation of pathchar. The primary differences are:
|Access:||Source freely downloadable.|
Iperf is a tool for measuring maximum bandwidth, reminiscent of ttcp and nettest.
It allows the tuning of various parameters and UDP characteristics.
Iperf reports bandwidth, delay jitter, datagram loss.
The Iperf code is also designed to compile easily on any POSIX compliant platform.
|Access:||Iperf source code|
|Contact:||Author: Luigi Rizzo ( luigi @ iet.unipi.it )|
|Overview:||dummynet is a flexible tool originally designed for for testing networking protocols, and since then (mis)used for bandwidth management. It simulates/enforces queue and bandwidth limitations, delays, packet losses, and multipath effects. It also implements a variant of Weighted Fair Queueing called WF2Q+. It can be used on user's workstations, or on FreeBSD machines acting as routers or bridges.|
|Access:||picoBSD bootable floppy binary is freely downloadable.|
|Contact:||Feedback form. Author: Rick Jones|
Netperf is a benchmark that can be used to measure the performance of
many different types of networking. It provides tests for
both unidirecitonal throughput, and end-to-end latency. The
environments currently measureable by netperf include:
|URL:||http://gunpowder.Stanford.EDU/~laik/funding/nettimer/index.html - (No longer available)|
|Contact:||Author: Kevin Lai (laik @ cs.stanford.edu)|
|Overview:||nettimer is useful for measuring end-to-end network performance. It can simulate or passively collect network traffic, and can also actively probe the network using a packet-pair 'tailgating' technique. There is no requirement for any special information from the network and no limitation to a particular transport protocol. Currently implemented metrics include bottleneck bandwidth and link bandwidth. Collected data is output using 'ns' database format.|
|Access:||Freely downloadable. Runs on GNU/Linux Redhat 6.1 and 6.2. lapack-3.0, blas-3.0 must be installed. nettimer RPM package must be installed, or else nettimer must be compiled. There are several code compilation dependencies: dmalloc 4.1.2, libpcap 0.4 or later, ns 2.1b6, Python, the Python gdbm extensions, and bzip2.|
|Contact:||firstname.lastname@example.org Author: Van Jacobson|
|Overview:||Estimates performance characteristics of each node along a path from a source to destination. Leverages the ICMP protocol's Time Exceeded response to packets whose TTL has expired. Sending a series of UDP packets of various sizes to each hop, pathchar uses knowledge about earlier hops and the round trip time distribution to this hop to assess incremental bandwidth, latency, loss, and queue characteristics across this link.|
|Access:||Shareware binaries downloadable at ftp://ftp.ee.lbl.gov/pathchar/ ; No source code available|
|Contact:||Author: Constantinos Dovrolis (email@example.com)|
|Overview:||Pathload estimates a range of available bandwidths for
an end-to-end path from a host (sender) to a host (receiver).
The available bandwidth is the maximum IP-layer
throughput that a flow can get in the path from sender to receiver,
without reducing the rate of the rest of the traffic in the path.
Pathload consists of a process running at sender and a process running at receiver. Sender sends periodic streams of UDP packets to receiver at a certain rate. Upon the receipt of a complete fleet, receiver checks if there is an increasing trend in the relative one-way packet delays in each stream. Pathload does not determine whether a particular rate is greater than available bandwidth based on just one stream. Instead, it sends "a fleet of N streams", so that it has N samples to decide whether particular rate is greater than available bandwidth, or not.
* The latest version (1.1.0) has been successfully tested in both low bandwidth paths (dial-up, DSL, cable modems), and high bandwidth paths (OC-3, OC-12, GigEthernet).
|Contact:||Author: Constantinos Dovrolis (firstname.lastname@example.org)|
|Overview:||pathrate estimates the capacity of Internet paths, even when those paths are significantly loaded. pathrate is based on the dispersion of packet pairs and packet trains. First, many packet pairs of variable size are sent from the source of the path to the sink in order to derive a set of local modes. One of these local modes is the capacity of the path. Then, long packet trains are sent and their total dispersion is measured. The Asymptotic Dispersion Rate (ADR) is calculated from the dispersion of these long packet trains. Given that the capacity of the path is larger than the ADR, any local modes less than the ADR are rejected. From the modes that remain, the strongest and narrowest local mode is selected as the capacity estimate. The latest version (2.3.0) has been tested in Gigabit Ethernet paths. A "quick termination" mode was added for an estimate after just a few seconds. This us useful for frequent light-weight measurements.|
|Contact:||Bruce A. Mah bmah @ acm.org|
|Overview:||Similar to pathchar, pchar attempts to characterize the bandwidth, latency, and loss of links along an end-to-end path through the Internet. pchar works on both IPv4 and IPv6 networks. It has been tested on various versions of FreeBSD, NetBSD, OpenBSD, Linux, Solaris, OSF/1, and IRIX, with primary development on FreeBSD and Solaris. Written in C++, recent additions to pchar include: an SNMP query feature, and better IPv6 detection at configure-time.|
|Contact:||Stefan Saroiu (email@example.com)
Stefan Savage (firstname.lastname@example.org)
SProbe is a tool for measuring bottleneck bandwidth in an uncooperative environment, i.e., one in which measurement software is deployed only on the local measurement host. SProbe uses the packet pair technique and exploits properties of the TCP protocol in a manner inspired by Savage's Sting tool. SProbe takes no more than three round-trip times (RTT) to produce a single estimate.
SProbe can measure bottleneck bandwidths in both directions of a network path. To measure bottleneck bandwidth to a remote host, using its default settings, SProbe sends six TCP SYN packets to an inactive port on the remote host and receives six TCP RST packets. Several heuristic tests check for abnormal packet arrival times to detect cross traffic -- foreign traffic that can alter the accuracy of an estimate. For a single measurement, SProbe generates 3160 bytes and receives 240 bytes.
To measure bandwidth from a remote host, SProbe relies on application level protocols. Currently, SProbe contains protocol modules for measuring bottleneck bandwidth from Web servers and Gnutella peers. For Web servers, SProbe generates an HTTP get request with a large TCP maximum segment size (MSS). SProbe waits for the Web server to send two large, back-to-back packets and measures their interarrival times producing a bottleneck bandwidth estimate.
SProbe is distributed with source code and installation instructions. It was tested on Linux platforms with kernel versions 2.2.x and higher and FreeBSD 3.4 and 4.2 platforms. SProbe uses the up-to-date libpcap library (ver. 0.6.2), included in SProbe's distribution. SProbe also uses a software firewall, ipfw, supported in typical installations of RedHat 7.x and FreeBSD 4.2. Finally, SProbe makes use of raw sockets, and therefore needs to execute under root privileges.
Much of the code SProbe builds on is borrowed from Sting.
Paper: (PS) (PDF) Slides: (PS) (PDF) Source release: sting-0.7
|Contact:||Matt Mathis (email@example.com), Jamshid Mahdavi (firstname.lastname@example.org)|
|Overview:||TReno is a TCP internet throughput measurement tool based on a user-level implementation of a TCP-li ke protocol. This allows it to measure throughput independently of the TCP implemention of end hosts and to serve as a useful platform for prototyping TCP changes. TReno is associated with the IPPM formal metrics effort (see http://www.psc.edu/~mathis/ippm).|
|Access:||Run from Pittsburgh Supercomputing Center (PSC) server.|
|URL:||ttcp ; nntcp page no longer available|
|Contact:||ttcp: ( ftp @ arl.mil ) nttcp by Elmer Bartel ( bartel @ Informatik.TU-Muenchen.DE )|
|Overview:||Originally written to move files around, but became the classic throughput benchmark or load generator, with the addition of support for sourcing to/from /dev/null. Has spawned many variants, recent ones include support for UDP, data pattern generation, page alignment, and even alignment offset control. nttcp allows mcast UDP transfers.|
|Access:||ttcp freely downloadable. nttcp page is no longer maintained, but nttcp-1.47.orig.tar.gz is reportedly found in the Debian stable release.|
|Overview:||Viznet is a standalone Java application to visualize network bandwidth performance over time. It is currently designed to work with the netlog library, also available from NLANR. However, adding a module for a different log format would not be difficult; we have contemplated also importing Cisco netflow data. Viznet can read data in real time from a network connection or post process a log file.|
|Access:||Access the repository here: http://www.comp.leeds.ac.uk/viznet/help/|
Forward Path Probes
|Contact:||Author: Ram Periakaruppan|
|Overview:||Combines traceroute with NetGeo server queries to plot hops at latitude and longitude on a map. Users can add their own maps as part of or independent of the existing world map hierarchy. Heuristics are used to determine router location. Color on the display distinguishes between authoritative and guessed locations: Green = both endpoints are authoritative. Yellow = one endpoint is authoritative; other is a guess. Blue = both endpoints are guesses. Red = one endpoint is a location that is a country center, state center, or obtained from a whois record.|
Vendor: Roger Wolff (R.E.Wolff@BitWizard.nl)
|Overview:||mtr is a network diagnostic tool which combines Ping and Traceroute into one program. It investigates the network connection between the host mtr runs on and a user-specified destination host.After it determines the address of each network hop between the machines, it sends a sequence ICMP ECHO requests to each one to determine the quality of the link to each machine. As it does this, it prints running statistics about each machine.|
|Access:||download mtr 0.41
|Contact:||Author: Eric Wassenaar (email@example.com)|
|Overview:||Traceroute (Version 991603) is available at 'ftp.nikhef.nl' [220.127.116.11]
This is a new version of 'traceroute', a utility to show the network route to a certain destination. Some of the new features are:
|Contact:||Marketing Director: Leigh Merrigan (LMerrigan @ apparentnetworks.com), Apparent Networks|
|Overview:||"PathView tests and troubleshoots remote networks, including segments that pass through service providers WAN and carrier clouds. Enabled by the PathView microAppliance, it's ideal for MSPs and businesses of all sizes that need a low cost, easy to use tool for managing remote network performance."|
|Access:||Free trial (http://www.trypathview.com/), inquire for price quotes.|
|Contact:||Author: Pete Ness|
|Overview:||Ping Plotter is a fast, small, and visual Ping/Trace Route utility that uses multiple threads to trace all hops at once for SUBSTANTIAL performance improvements over standard trace routes. Delivers visual graphs of performance to pinpoint problems and see ranges of responses and trends. Will trace continuously with any interval and can alert via e-mail if desired. Can display data over a period of time for trending information. Support includes on-line FAQ and support forums.|
|Access:||Latest version and betas are shareware ($15US) from http://www.pingplotter.com or Atlantic Coast Soft Shop. Older versions offered as freeware downloadable from http://www.pingplotter.com.|
|Contact:||traceroute @ ee.lbl.gov|
|Overview:||Directs a packet to each router along a path without actually knowing the path, by setting the IP TTL field from 1 to n until the ultimate destination is reached. Upon receiving a packet with an expired (0) TTL, the hop generates an ICMP Time Exceeded response back to the source, thus identifying the hop and its round trip delay. Each UDP packet is sent to a probably-unused port, so when the destination receives the packet it responds with ICMP Port Unreachable.|
|Access:||Freely downloadable at ftp://ftp.ee.lbl.gov/traceroute.tar.gz|
|Contact:||Author: Bryan Christianson ( bryan @ whatroute.net )|
|Overview:||traceroute variant for the Macintosh. Traces Internet paths, pings remote hosts, uses either Open Transport or DNS Query to resolve names, can monitor activity on an Ethernet LAN, includes finger and whois clients, and a built-in Telnet server. Can plot routes on a world map.|
|Contact:||Author: Bjorn Augustsson|
|Overview:||Graphical traceroute that shows a path as a series of lines between 'sites' (shown as small balls of different colors) on a rotating globe.|