Protocol Logging During Ping

Protocol Logging During Ping

Last updated: December 3, 2008

This section is only applicable to the lab applications.

Ping data passing between the test set and the mobile station can be logged using the Wireless Protocol Advisor (WPA) (see Protocol Logging ). The log results during ping depend on the method used. Here are several methods and descriptions of the log results.

Method 1: Ping the Mobile Station from the Test Set

To capture a protocol log while pinging the mobile station from the test set, start a capture in the WPA and then follow the steps in Ping the DUT from the test set .

Looking at the Protocol Log

Note that the Source Address for the IP datagram in the Down direction is an unknown IP address. This is an internal address the test set uses to originate IP traffic from the test set to the mobile station.

See Ping Log for more information about the log.

Method 2: Ping an Alternate IP Address From the Test Set

To capture a protocol log while pinging an alternate IP address from the test set, start a capture in the WPA and then follow the steps in Ping an alternate address from the test set .

If your Alternate Ping Address is anything but the mobile station address, the test set's protocol logging does not log this ping. The test set's logging only captures messages exchanged between the test set and the mobile station. If you have a network logging device on your LAN, it will show that the source IP address is the test set's LAN IP address. If your Alternate Ping Address is the mobile station address, then the data is logged by the test set, and the Source Address for the datagram in the Down direction that contains the ping data is the same IP address as in Method 1.

Method 3: Using Ping From Other Devices

Any device on the network that has a ping feature can ping any other device, including the mobile station. For example, if you have a PC on the LAN that the test set is connected to, you can use ping from that PC to ping the mobile station.

Example procedure of pinging the mobile station from another device (e.g. a Windows PC):

  1. Start protocol logging. See Protocol Logging .
  2. Open a MS DOS command prompt on the PC.
  3. Type the following command

    ping xxx.xxx.xxx.xxx

    where xxx.xxx.xxx.xxx is the IP address of the mobile station.

  4. The ping should respond as normal.
  5. Stop logging.

In this case, the Source_Address for the datagram in the Down direction that contains the ping data is the IP address of your PC.

Ping Log

The Ping can be logged using the Wireless Protocol Advisor (WPA) (see Protocol Logging ), and certain information can be derived from the log of the Ping.

Related Topics


Ping

How to "ping" an IP address from the test set

Data Channel

Protocol Logging and Data Channel Troubleshooting