Marathon MAGNUM ROUTER - Manual (Page 150)

Chapter 10: Magnum Router Troubleshooting
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10-3
Symptom: M1 to Marathon Base Unit A1 link is not active.
Solution:
• Marathon A1 port defective, or Magnum Router Module port defective.
• Check configuration of the M1 port (it should remain at the factory default settings as
seen in chapter 7 of this guide with the exception of the clock speed, which is variable
depending on your application). Also check the configuration of the A1 port of your
Marathon base unit (a sample of this configuration is provided in Chapter 12). If both
configurations and cabling appear to be correct, you may try using one of the WAN ports
to connect to A1.
Frame Relay Link Performance Slow/Unreliable
Symptom: Dropped frames showing in manager statistics window.
Solution:
• Frames received for un-configured DLCI’s. Delete unused DLCI’s from originating
equipment.
• Frames received with format errors (bad header information). Format errors will also be
indicated in the manager statistics window.
Verify cable, and verify that attached equipment is properly configured and operating
correctly.
• Frames could not be forwarded, due to port speed mismatch and resultant congestion.
Make sure the CIR or physical port speed is high enough to handle all configured
DLCI’s.
Symptom: Time-outs, slow or erratic workstation performance when connecting to server or
transferring data over dedicated or frame relay links.
Solution: If there are no format errors or dropped frames shown in manager statistics, and
WAN utilization is in the 80% to 100% range, this indicates that the link speed is too slow for the
amount of traffic, increase link speed with your Telco / carrier service provider.
Problems Connecting to the Manager
The following will assist you in determining why you are having problems connecting to and
using the Magnum Router Module Manager with the Magnum Router Module.
PC to Magnum (Serial) Problems
Symptom: When the Magnum Router Manager is launched, it displays a red down arrow in the
lower right hand corner of the main menu and never changes to a green up arrow and a valid
connection is never established.
Solution: Manager configured for wrong communications port or cabling problem from the PC
to the Magnum Router. Configure manager for correct communications port and verify that the
proper cable is being used and that it is connected.