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224 SPARCstation 20 Service Manual • July 1996

watch-net, watch-aui, watch-

tpe, watch-net-all

The watch-net, watch-aui, watch-tpe, and watch-net-all commands

monitor broadcast Ethernet packets on the Ethernet cable(s) connected to the system.

Good packets received by the system are displayed by a period (.). Erroneous

packets received by the system are indicated with an X and the error description.

CODE EXAMPLE E-4 identifies the watch-net command output message.

The SPARCstation 20 system has two types of on-board Ethernet interfaces: 10Base-

T (also called twisted-pair Ethernet or TPE) and 10Base5 (also called thick Ethernet

or AUI). Only one on-board interface may be connected at a time. The system

automatically selects which interface is connected and active.

The AUI port is first tested by transmitting data packets and checking for No Carrier

or response packets. If the AUI test fails, the TPE port is then tested.

This automatic selection occurs by typing watch-net.

CODE EXAMPLE E-5 identifies

the watch-net command output message.

CODE EXAMPLE E-5 identifies the watch-

tpe command output message.

CODE EXAMPLE E-5 identifies the watch-net-all

command output message.

CODE EXAMPLE E-4 watch-net Command Output Message

ok watch-net

Internal loopback test -- succeeded.

External loopback test -- Auto-selecting Ethernet cable I/F

Trying AUI

Received packet on AUI

Select cable - AUI

succeeded.

Looking for Ethernet packets.

’.’ is a good packet. “X” is a bad packet.

Type any key to stop.

...............................................................

...................Framing error CRC error X...................

Sun Microsystems SPARCstation 10SX User Manual

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