PCI Token Ring Administrator's Guide

Troubleshooting Token Ring
Diagnostic Flowcharts
Chapter 4 105
Flowchart 8 Procedures
A. Execute linkloop to adjacent remote host. Enter the link level
address (station address) of the adjacent remote host in hexadecimal
form (preceded by “0x”). Execute lanscan (1M) to find the link level
address (station address) on the remote host or obtain it from your
network map. For more information on linkloop, refer to the
linkloop(1M) on-line man page.
B. linkloop successful? If so, stop. Network connectivity is okay
through the Link Layer (OSI Layer 2). If not, note which error was
returned and continue with this flowchart.
C. Correct parameter. Correct the input parameter to linkloop(1M)
according to the linkloop message. Refer to the linkloop(1M) man
page for more information.
D. Failed due to illegal or bad input parameters? If the message
indicates a failure, go to C. If not, continue to E.
E. Choose a different adjacent remote host; re-execute linkloop.
Redo linkloop(1M) using a different remote host.
F. Problem solved? If so, stop. If not, go to J.
G. linkloop successful? If so, stop. Network connectivity is okay
through the Link Layer (OSI Layer 2). If not, go to flowchart 5 to
verify network level connectivity. The problem may be with the
remote system.
H. Check remote host’s connectivity to Token Ring; re-execute
linkloop. Contact the node manager of the remote host. Check that
the host is configured correctly and that its network interface is up.
Re-execute linkloop. If necessary, verify configuration to the remote
host.
I. linkloop successful? If so, stop, Network connectivity is okay
through the Link Layer (OSI Layer 2). If not, go to flowchart 1.
J. Execute linkloop to local host. If not in 100Mb/s or FDX modes,
execute the linkloop(1M) command specifying the local Token Ring
station address. For example:
linkloop -i NMID <station address>
K. linkloop successful? If so, the Token Ring link is verified. If not, go
to flowchart 1 to verify the hardware.