OSI Troubleshooting Guide, May 1997

38 Chapter 1
Interoperability Testing
Interpreting LAN Errors
getmsg (DL_TEST_CON)
getmsg (DL_UNITDATA_ACK)
Receives information
from the remote either on
Receive or Test Frame
operation. Usually means
time out.
Check MAC address
specified, and cabling
between the two systems.
If neither is true, check to
see if remote supports
IEEE 802.3 TEST frames.
putmsg (DL_TEST_REQ) The local system is not
configured to use IEEE
packets.
Check and correct as
necessary using the
lanconfig(1M) command.
putmsg (DL_UNITDATA_REQ) Data exceeds maximum
MTU size for LAN.
Use “status” in LAN Test
menu to determine MTU
size.
Error Reason Action