Finisar Surveyor manual Application Response Time, Working with Analyzer Devices

Expert Features 10

Application Response Time

Working with Analyzer Devices

For THGm or NDIS resources, expert views present expert information on capture files, capture buffers, or in real-time monitor mode.

An analyzer card with a hardware capture buffer is typically used for expert analysis. Use of an NDIS or Portable Surveyor 10/100 Ethernet Analyzer Card severely limits the number of packets that can be analyzed and the effectiveness of network diagnostics.

Application Response Time

The response time for various applications is measured in milliseconds (ms). A threshold can be set in the Application Response Time Alarms for all supported applications. Supported applications are:

•DNS

•FTP

•Gopher

•HTTP

•NFS

•NNTP

•POP

•SMTP

•TELNET

From Detail View, press the Application Response Time button to see applica- tion response times. See Chapter 6 on Views for more information on the Applica- tion Response Time table.

To calculate application response time, Surveyor causes a stimulus packet to be trasmitted so the application layer round trip time can be assessed. However, the packet cannot be sent if the analyzer device used by Surveyor is connected through a tap device.The application response time will only work if the transmit port of the analyzer is directly connected to a switch port or device.

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