Ping

Last updated: May 19, 2009

This section is only applicable to the lab applications.

Ping is a tool to help check system interconnects. The test set has a Ping feature that allows you to ping either the DUT IP Address or an alternate address specified by you (see How to "ping" an IP address from the test set ). It sends an IP datagram (technically an ICMP message: Internet Control Message Protocol) from the test set to the ping target, and expects a response from the target. You can define the size of the IP datagram and the Internet Protocol to use (whether IPv4 or IPv6) when using this feature. The default packet size is 64 bytes for both IPv4 and IPv6. If a response is received it is recorded on the test set's display.

NOTE

For Multiple PDP Context, a selection of DUT to ping will result in the pinging of DUT IP Address 1, the only way to ping each of the remaining DUT related IP addresses is to set them manually as Alternate Device to ping.

Ping is the simplest implementation of the Data Channel feature. If you are trying to debug a system that is not responding to a full network setup (for example a WAP setup), try pinging the DUT from a computer attached to the network. Experiment with very large packets, very long timeouts and continuous pings.

How to ping the DUT

The following procedure details how to ping a DUT

Press the CALL SETUP screen key.
Press the More key until screen 2 of 3 of the Control menu is displayed.
Press Ping ( F3 ).
Press Ping Setup ( F1 ) and the Ping Setup menu appears in the center of the screen.
Use the knob to highlight Device to Ping and set it to Alternate .
Use the knob to highlight Alternate Ping Address and use the number key pad to imput the IP Address of the device to ping.

How to ping an Alternate Device

The following procedure details how to ping a Alternate Device

Press the CALL SETUP screen key.
Press the More key until screen 2 of 3 of the Control menu is displayed.
Press Ping ( F3 ).
Press Ping Setup ( F1 ) and the Ping Setup menu appears in the center of the screen.
Use the knob to highlight Device to Ping and set it to Alternate .
Use the knob to highlight Alternate Ping Address and use the number key pad to imput the IP Address of the device to ping.

How to Read the Ping Results

If the connection is good, then the device returns a packet to the test set and the packet transfer information is displayed on the test set's screen (see Ping Data Display ). The figure below shows the kind of information that is displayed on the Ping screen. In this example, the Ping Count has been set to ping 10 times. Note that on average it took 1248 msec to complete a ping.

Ping Data Display

Operating Considerations

When pinging the DUT, the DUT must either accept a network initiated PDP Context activation or have requested a PDP Context (for GPRS or EGPRS) or the instrument status should be Connected + Data (for GSM CSD).
There are restrictions regarding IP Addresses that are valid for use. See IP Address Requirements for more information.
Ping is only available in Active Cell operating mode and when the data connection type is set to Auto.
When the Ping originates from the test set and the target is the DUT, the Downlink Source address is always the IP address of the test set, and Uplink Destination Address is the same value.
Your mobile station must support ping for you to be able to successfully ping the DUT IP Address.
When the Ping Protocol is set to IPv6, the Alternate Ping6 Address is divided into four parts to simplify the manual input: Alternate Ping6 Address Prefix, Upper (Hex), Alternate Ping6 Address Prefix, Lower (Hex), Alternate Ping6 Address IID, Upper (Hex), Alternate Ping6 Address IID, Lower (Hex).
If the test set does not support the LAN 2 PORT due to hardware restriction and the Ping Protocol is set to IPv6 ,then ping to a DUT (the Device to Ping is set to DUT ) will cause an error indicating that the requested operation is not supported.



 
Ping Protocol


IPv6


Ping Timeout