Chapter 5 TCP/UDP Testing
About TCP/UDP testing
164
HST-3000 Ethernet Testing User’s Guide
About TCP/UDP testing
If you purchased the TCP/UDP option, you can use the
HST-3000 with an Ethernet SIM to:
– Transmit IPv4 traffic with a TCP or UDP header carrying a
valid length, checksum, and destination port.
– Verify that routers are prioritizing traffic for various ports
properly.
– Verify that the bandwidth allocated to a customer per their
Service Level Agreement is available.
The IPv6 Traffic option is also required if you want the ability
to transmit and analyze layer 4 IPv6 traffic.
Understanding the ATP Listen Port
Many applications (such as delay measurements, out of
sequence counts, lost frames counts, and packet jitter
measurements) and multiple-stream tests must be performed
using traffic that carries an Acterna Test Packet (ATP)
payload. Each of these packets has a time stamp and a
unique sequence number which are used to calculate a
variety of test results.
The HST uses the ATP Listen Port to determine whether
received layer 4 traffic carries an ATP payload; therefore, it is
essential that you specify the destination port carried in the
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