4 - C H A P T E R -

C H A P T E R 4

SunATM Adapter Test (atmtest)

The atmtest checks the functionality of the SunATM trademark -155 and SunATM-622 SBus and PCI bus adapters.

It runs only in loopback (external or internal) mode. The asynchronous transfer mode (ATM) adapter, and ATM device driver must be present. To run the atmtest in external loopback mode, a loopback connector must be attached to the ATM adapter. The internal loopback mode does not require a loopback connector.

atmtest uses DLPI RAW mode to talk to the device driver. It establishes a virtual circuit (VC) to send a message, receive a message, and compare messages. If the message does not match, or the message is out of sequence, it displays an error message.

Using a random number generator, atmtest sends data into a data buffer and then sends each message from a different starting point. This assures that no two consecutive messages are the same.

atmtest can test more than one virtual circuit. The more virtual circuits used increases the stress level of the test. atmtest automatically selects the virtual circuit number which is unique to the test.

atmtest is nonscalable because it provides multiple virtual circuits to be tested by a single instance.

atmtest Test Requirements

atmtest can only be selected when the Intervention mode is enabled since it requires a loopback connector for external loopback testing. While Intervention mode is enabled, atmtest and nettest are both available as default selections; however, you must deselect nettest when testing the ATM device.

Bring the ATM interface down to make sure that the interface is in offline mode before running atmtest.

Note - Do not run nettest while running atmtest.

Note - The external optical loopback test requires a 62.5 micron cable.

atmtest Options

To reach the dialog box below, right-click on the test name in the System Map and select Test Parameter Options. If you do not see this test in the System Map, you might need to expand the collapsed groups, or your system may not include the device appropriate to this test. Refer to the SunVTS User's Guide for more details.

FIGURE 4-1 atmtest Test Parameter Options Dialog Box

Screenshot of the atmtest Test Parameter Options dialog box.

TABLE 4-1 `atmtest` Options
Options	Description
Configuration	The post address, host ID, and domain name of the system being tested.
Total packets	The total number of packets sent. The default number of packets sent is 10000.
Number of VC	The default number of virtual circuits is 2. The `atmtest` uses these two virtual circuits to send out messages simultaneously. The message is received in sending order.
MAX_PKG_LEN	The maximum packet length to be used by the test to send out the data. The default number is 9140.
Outstanding_pkts	Describes the maximum number of outstanding packets. `atmtest` stops sending messages when the outstanding packet count is more than the number of packets this field specifies.
First_VC_no	Enables the user to set up the starting virtual circuit number to be used for each `atmtest` instance. `atmtest` can automatically avoid virtual circuit numbers that have already been used.
Bandwidth	Enables the user to select different bandwidths to test. The default number is 14.
Loopback	Enables the user to select either the external loopback field or internal loopback field. The default selection is the external loopback field. A loopback connector is only needed for external loopback testing.
Print Warning	Disabled by default. Click Enable to see warning errors, such as retry on timeout.

atmtest Test Modes

TABLE 4-2 `atmtest` Supported Test Modes
Test Mode	Description
Functional (Offline)	Runs the full set of tests.

atmtest Command-Line Syntax

/opt/SUNWvts/bin/atmtest standard_arguments,-o dev=device,tpkts=n,nv=n,ml=n,bw=n,opkts=n| warn|ld|sd|sl|nc|ns,vcf=n

TABLE 4-3 `atmtest` Command-Line Syntax
Argument	Description
`dev=`device	Specifies the device name to be tested, such as `ba0` or `sa0`.
`tpkts=`n	Specifies the number of packets to loopback, -1 for continuous [1...2147483647, -1].
`nv=`num_vc	Specifies the number of simultaneous virtual circuits to be tested.
`ml=`max_len	Specifies the maximum length of the random packet.
`bw=`bandwidth	Specifies the bandwidth in MBits/s of a virtual circuit.
`opkts=`n	Specifies the number of packets for each virtual circuit that can be transmitted without receiving a corresponding packet.
`warn`	When enabled, prints warning messages.
`ld`	The internal loopback mode is selected.
`sd`	Changes the payload data to static instead of random.
`sl`	Changes all packets to their maximum length.
`nc`	Instructs the test not to check the receive payload (improves throughput).
`ns`	Instructs the test not to exit on a packet reception failure.
`vcf`=n	Specifies the first virtual circuit number used.

Note - 64-bit tests are located in the sparcv9 subdirectory: /opt/SUNWvts/bin/sparcv9/testname. If the test is not present in this directory, then it may only be available as a 32-bit test. For more information refer to 32-Bit and 64-Bit Tests.