Stage 5: Two machines are not communicating

This stage investigates why two machines are not communicating with each other. Perform the following tests on both machines.

  1. Log onto the SS7 Server machine as dtuser
  2. Enter the SS7_MAINT command
  3. From the top level menu, enter F (Fault Finding)
  4. From the submenu, enter 1 (D7 Network Check)
An example of the output is shown in Stage 2: Which other machines are present?.
By comparing the data displayed on your screen with the symptoms listed below, go to the corresponding section listed in the Action column:
Symptom Action
Both entries have a U in the STAT column in both outputs Go to stage 5a
One output shows L|A and the other shows U in the STAT column Go to stage 5b
Both entries show L|A in the STAT column Go to stage 5c
One or both of the machines is missing from the other's output Go to stage 5d

Stage 5a: There is no communication between the machines.

Try the following steps
  1. Verify the LAN connection between the two machines and its quality.
  2. Review the SS7itty configuration to ensure that the specified Primary LAN address for each machine is correct, that is, they match the values returned when you enter hostname –s.
  3. Restart the D7 package on both machines.

Stage 5b: There has been a connection between the machines at one time.

Try the following actions:
  1. Verify the quality of the LAN connections and that communication between the two machines is possible.
  2. Restart the D7 package on both machines and then repeat this stage.

Stage 5c: There is a good connection between the two machines

In this case the problem has been resolved. It may be that the problem in intermittent and this stage should be repeated.

Stage 5d: There is a configuration problem in defining the machines within the SS7 Cluster

Try the following steps:
  1. Review the SS7itty configuration to ensure that all machines have been declared, and have correct Primary LAN addresses.
  2. Restart the D7 packages for the two machines.
  3. Reapply the Host MML configuration – use options C and H from top level menu of SS7_MAINT. Review the log file for errors, then restart the D7 package on the two machines.
  4. Refer to the subsection on flush configuration in Migration.
Parent topic: Problem determination