General troubleshooting

1. Work from the bottom of the protocol stack up: first, IP Network; then the SS7 link or connection; then traffic routing.
2. Review provisioning and verify configuration in this order:
   • Card
   • Signaling (SS7) link
   • Linkset
   • IP link or IP network
   • Association or Application Server (IPGWx only)
   • Traffic routing or SS7 route and route key (IPGWx only)

   General troubleshooting tools include the following:

   • Ethereal – PC-based network analyzer (sniffer) – www.ethereal.com/www.wireshark.com
   • netstat/sctp pass commands to display TCP/IP or SCTP/IP network statistics
   • ualog/asplog/linkinfo pass command to retrieve logs of events in stack and control messages transmitted or received
   • msucount pass command to display traffic counts of MSUs that have been transmitted, received, rerouted, or discarded, and the discard reason