Tools
Bandwidth and recording
Tool |
Description |
Iperf |
A tool to measure link utilisation between endnodes. IperfER is a suite of perl
scripts with the aim to automate the collation of iperf data and anaylsis
of such data. It is based heavily on the PingER suite. |
Pipechar |
Pipechar is a program that probes the network to find out a bottleneck link across a network. It can also supply information regarding RTT and jitter times. It does, however, require superuser privileges in order to run, you can change this by following hte instructions here. As the tool throttles the network to each hop in the connection, it can be a very intrusive application to use on a network. Pipechar
is a 'Sender only' network probing program that can be used to diagnose
potential problems in a network link by displaying. Information about
the bandwidth at each hop of an internet connection is displayed along
with information regarding the ping times. However, in order to do
this pipechar has to send a large burst of data through the link which
may cause further problems on the network if already problematic. |
pchar |
Similar to pipechar but actually works for high capacity links |
PingER |
PingER can be used to measure the RTT, packet loss percentages and the variability in response time between a pair of end-nodes. Being well established in the HEP community, it currently has hundreds of sites in many countries. As such, it is favoured above other tools such as Surveyor [SURVEYOR], RIPE NCC [RIPE_NCC] and MRTG [MRTG]. |
Netperf |
Netperf provides a general measure of performance of a network. It can give a measure of latency between request and response of generic transactions across a TCP/IP network by conducting unidirectional throughput. |
Packet Tracing
For a more information, see here.
| Tool | Description |
NetLogger |
NetLogger |
TraceRoute |
Traceroute is a program that analyses the path of
an end-to-end connection. It can supply information regarding the
ping times to the intermediate routers and the names (IP/DNS) of
the routers. As such it can give information about the route that
an end-to-end connection establishes. |
TCPDump |
TCPDump is a tool for network monitoring and data acquisition. It requires the libcap library. You can visualise tcpdump info using tcptrace. More information here. |
| tbit | Is a tool to identify the use of TCP on various servers over the internet. One site information here. |
Prediction
| Tool | Description |
NWS |
Network Weather Service (NWS) is a distributed system that periodically monitors and dynamically forecasts the performance of various network and computational resources over given time interval. It can also measure metrics such as TCP bandwidth. It utilises a central reserve from which data is collated and used for network forecasting. |
| Thu, 3 October, 2002 17:31 |   |
Room D14, High Energy Particle Physics, Dept. of Physics & Astronomy, UCL, Gower St, London, WC1E 6BT
