CHAPTER 2

SunATM Adapter Test (atmtest)

atmtest checks the functionality of the SunATM-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 as it provides for more than one virtual circuit to be tested for each instance, which is adequate for the purpose of a stress test.

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.

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Note - Do not run nettest while running atmtest.

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

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atmtest Options

FIGURE 2-1 atmtest

TABLE 2-1 atmtest

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 number of virtual circuits to be set up by one instance. The default number of virtual circuits is 2for each instance. The atmtest uses these two virtual circuits to send out messages simultaneously. The message is received in sending order.
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.
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.

atmtest Test Modes

atmtest can only be run in Functional test mode.

atmtest Command Line Syntax

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

TABLE 2-2 atmtest

Argument	Explanation
dev=device	Specifies the device name to be tested, such as ba0.
tpkts=n	Specifies the number of packets to loopback [1.2147483647].
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.
lb	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.

atmtest Error Messages

The atmtest error messages are listed below with explanations or probable causes:

TABLE 2-3 atmtest

Error Message	Probable Cause(s)	Recommended Action
6000 putmsg failed, errmsg=data
6001 getmsg failed, errmsg=data

TABLE 2-3 atmtest(Continued)

	Error Message	Probable Cause(s)	Recommended Action
6002	wrong vc: exp: number, obs: number
6003	VC number bogus pkt, seq: exp=number, obs=number; len: exp=number, obs=number
6004	VC number bad pkt len, EXP: number, OBS: number, seq=number
6005	VC number memcmp error
6006	VC number failed to rcv a packet
6007	Complete Usage: string u
6008	string: alarm
6009	string: getmsg
6010	receive string for string with string error
6011	DL_OK_ACK was not M_PCPROTO
6012	short response ctl.len: number
6013	ctl.len sizeof (dl_ok_ack_t): number
6014	receive string for string with string error
6015	DL_BIND_ACK was not M_PCPROTO
6016	ioctl DLIOCRAW failed, errmsg string
6017	ioctl DL_IOC_HDR_INFO failed, errmsg string
6018	len=number hdrmax=number
6019	ioctl ADDVC failed, errmsg string
6020	ioctl ALLOCBW failed, errmsg string
8000	open device failed, errmsg=string

TABLE 2-3 atmtest(Continued)

	Error Message	Probable Cause(s)	Recommended Action
8001	sa_add_vpci failed, errmsg=string
8002	sa_allocatebw failed, errmsg=string
8003	atm_attach failed, errmsg=string