Comtech EF Data DTMX5000 SpectraCast - Manual (Page 129)

DTMX5000 IP Gateway Troubleshooting
Rev. 1 5–5
5.2 Ongoing Maintenance
Issue that may be encountered during the daily functioning of the Gateway, such as:
•
A User Indicates RF Lock but Cannot Receive Data
•
The Gateway Statistics Indicate a Large Number of Discarded Packets
•
The Gateway Does Not Reply to Telnet but Does Reply to SNMP and Terminal
Communication
•
A User Cannot Receive Multicast Channels or Loses Multicast Packets
•
A PC Connected to a LAN Fed by a Satellite Receiver (Static User) Does Not
Receiver Unicast Transmissions
•
The CCU Cannot Register a User in the Gateway
5.2.1 A User Indicates RF Lock but Cannot Receive Data
Possible Cause Solution
The user is not registered in the
Gateway's routing table. Check that the user appears in the Gateway's routing table.
Incorrect Group settings. Check that the user's Group setting is correct and change if
necessary.
Incorrect Group PID settings. Check the Group's PID setting and change if necessary.
No data is being sent to the user. Check the user statistics table to verify that the Gateway is
transmitting data.
The receiver does not provide full MPE
support. Check the LLC-SNAP parameters and change if necessary.
5.2.2 The Gateway Statistics indicate a Large Number of Discarded
Packets
Possible Cause Solution
The Gateway's output bit rate is too low. Check the output bit rate and change if necessary.
If QoS is activated, TCP protocol will
increase the output bit rate until packets
are discarded. This is normal for TCP
connections.