"Fossies" - the Fresh Open Source Software Archive  

Source code changes of the file "README" between
bwping-1.16.tar.gz and bwping-1.17.tar.gz

About: BWPing is a tool to measure bandwidth and response times between two hosts using Internet Control Message Protocol (ICMP) echo request/echo reply mechanism.

README  (bwping-1.16):README  (bwping-1.17)
skipping to change at line 59 skipping to change at line 59
-v volume -v volume
Sets the volume to transfer in bytes. Sets the volume to transfer in bytes.
AUTHORS AUTHORS
Oleg Derevenetz <oleg.derevenetz@gmail.com> Oleg Derevenetz <oleg.derevenetz@gmail.com>
BUGS BUGS
None known. None known.
NOTES NOTES
This utility uses raw sockets to deal with ICMP messages, so root This utility uses raw sockets to deal with ICMP messages, so it may
privileges are required to run it. require root privileges or extended capabilities (such as CAP_NET_RAW
on Linux) to run. It can also be run as setuid root.
Although bwping and bwping6 does not require any special software on Although bwping and bwping6 does not require any special software on
the remote host (only the ability to respond on ICMP echo request the remote host (only the ability to respond on ICMP echo request
messages), there are some special requirements to network messages), there are some special requirements to network
infrastructure, local and remote host performance: infrastructure, local and remote host performance:
1. There should be no ICMP echo request/reply filtering on the network. 1. There should be no ICMP echo request/reply filtering on the network.
This includes QoS mechanisms (which often affects ICMP) at any point in This includes QoS mechanisms (which often affects ICMP) at any point in
the testing path; the testing path;
2. Local host should have enough CPU resources to send ICMP echo 2. Local host should have enough CPU resources to send ICMP echo
request messages with given rate, and remote host should quickly request messages with given rate, and remote host should quickly
respond on these messages and should have no ICMP bandwidth limiting respond on these messages and should have no ICMP bandwidth limiting
turned on. turned on.
If some of these requirements are not satisfied, then measurement If some of these requirements are not satisfied then the measurement
results will be inadequate or fail completely. In general, for testing results will be inadequate or fail completely. In general, for testing
bandwidth where QoS is implemented, always test with traffic that bandwidth where QoS is implemented, always test with traffic that
matches the QoS class to be tested. matches the QoS class to be tested.
SEE ALSO SEE ALSO
netstat(1), ping(8) netstat(1), ping(8)
bwping(8) bwping(8)
 End of changes. 4 change blocks. 
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