NTttcp

NTttcp is a Windows base testing application that sends and receives TCP data between two or more endpoints. It’s a Winsock-based port of the ttcp tool that measures networking performance bytes/second.

Usage:
NTttcp [-s|-r] -m mapping
-s work as a sender
-r work as a receiver
-m mappping, Sessions,Processor,target ip address
-t runtime in seconds

Example:
NTttcp -s -m 4,0,192.168.10.11 -t 60
Sends 4 sessions on CPU 0 to host with ip address of 192.168.1.10 for 60 seconds.

Configuration:
Setup one system for receive and one system for send. Run the receive system first.

Example:
System A has an ip address of 192.168.10.10 and setup for Receive.
System B has an ip address of 192.168.10.11 and setup for Send.
Run NTttcp on System A:
NTttcp -R -m 4,0,192.168.10.11 -t 60
Note: the ip address is the expected sender’s ip.
Run NTttcp on System A:
NTttcp -R -m 4,0,192.168.10.10 -t 60
Note: the ip address is the receiver’s ip.
Monitor it with Windows Task Manager, Networking tab.

More options:
NTttcp: [-s|-r|-l|-n|-p|-a|-x|-rb|-sb|-i|-f|-u|-w|-d|-t|-cd|-wu|-nic] -m <mapping> [mapping]

-s work as a sender
-r work as a receiver
-l <Length of buffer> [default TCP: 64K, UDP: 128]
-n <Number of buffers> [default: 20K]
-p <port base> [default: 5001]
-sp synchronize data ports, if used -p should be same on every instance
-a <outstanding I/O>  [default: 2]
-x <PacketArray size> [default: 1]
-rb <Receive buffer size> [default: 64K]
-sb <Send buffer size>[default: 8K]
-u UDP send/recv
-w WSARecv/WSASend
-d Verify Flag
-t <Runtime> in seconds.
-cd <Cool-down> in seconds
-wu <Warm-up> in seconds
-nic <NIC IP> Use NIC with for sending data (sender only).
-m <mapping> [mapping]
where a mapping is a session(s),processor,StartReceiver IP set
e.g. -m 4,0,1.2.3.4 sets up:
4 sessions on processor 0 to test a network on 1.2.3.4