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114 Appendix B: EIU troubleshooting
297-8991-910 Standard 03.01 August 1999
Tools
Table 29 summarizes the tools available for troubleshooting the EIU.
For more information on these tools, refer to Commands Reference Manual,
297-1001-822.
Troubleshooting checklist
Much of the troubleshooting required for the EIU is handled at the frame,
shelf, and software load levels. There are, however, some problems that
operating company personnel can troubleshoot at the EIU level.
Table 30 lists the problems that the operating company and customers can
encounter. The table also lists probable causes, referenced to the list at the end
of the table.
Table 29 Tools for EIU troubleshooting
Tool name Resident Description
IPOMSCI Y monitors internal operational measurements (OM)
generated by the different layers of Internet
Protocol stack (for example
• transmission control protocol (TCP)
• Internet Protocol (IP)
• Internet control message protocol (ICMP)
• address resolution protocol (ARP)
• SuperNode access protocol (SNAP)
IPRTRACE Y monitors and displays the intermediate paths taken
by the IP packets (generated by SuperNode) to
their destinations.
NETMAN Y displays information on TCP and user datagram
protocol (UDP) connections
SNPINGCI Y use to ping remote IP nodes for checking
serviceability of these remote nodes
Table 30 EIU troubleshooting checklist
Problem Probable cause
Cannot ping any SuperNode-based node from an external
node or vice versa
1, 2, 3, 4, 5
Can ping to a SuperNode-based node, but cannot set up a
TCP connection
4
(Sheet 1 of 2)