This program makes it easy to test network equipment. It allows to easily and quickly start a (server) process on each machine, which can send and receive test data. The initiation and progress monitoring of (several) connections are made from a client process on any machine.
The general idea is to let each machine try to send and/or recieve as much data is it can.
mach1 mach3 mach4 Rates (/s) mach2 mach4 mach5 cpu 19% 14% 78% 83% 11% 10% rx\tx 2.2M 6.3M 45.7M 45.2M 10.6M 6.1M mach1 6.1M 1.2M 2.3M 2.2M 209k 112k mach2 11.3M 1.1M 4.6M 4.5M 658k 403k mach3 39.6M 570k 1.2M 37.6M 137k 75.7k mach4 39.8M 386k 1.2M 37.9M 126k 160k mach5 8.1M 50.8k 1.8M 599k 443k 5.4M mach6 11.2M 62.8k 879k 348k 395k 9.6M
So far: two malfunctioning switches identified (not above).
Network torture tool ./ntt options --server[=PORT] Start NTT server (shutdown after 4h without connection). --daemon Daemonize the server. --buffer=N Set buffer size (for following connections = ffc). --limit=N Limit transmit bandwidth usage (ffc). (0 = no limit) --respond=N Wait for N response bytes after each buffer sent (ffc). --pattern=PTN Transmission test pattern, PTN=none,zero,scanbuf,scan,rnd. HOST1[:P],HOST2[:P] Create data connection from HOST1 to HOST2. R:HOST1[:P],H2[:P] Create reversed data connection to HOST1 from HOST2. HOST[:PORT] Monitor NTT server on HOST. --set:N=H1,H2,... Define a set of hosts, with tag N. --connset=[R:]M,N Create connections from all M hosts to all N hosts. --matrix Show connections as a matrix of machines. --mtu Show discovered MTU for connections (where available). --logfile[=FILE] Write a log of the connection statistics. Note: network names HOST1 are looked up from / relative to HOST2. --rnd Dump random bitstream. (NOTE: it is a bad PRNG!) --purge=HOST[:PORT] Close all client connections on HOST. --kill=HOST[:PORT] Shut the server on HOST down.
otherhost> ./ntt --server thishost> ./ntt --server thishost> ./ntt otherhost,localhost
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