Troubleshooting guide:
Data Transfer Problems
Data Transfer
| Problem Symptom | Possible Cause(s) | Action |
|---|---|---|
| During data transfer, RR poll frames are transmitted, and eventually the link resets. | T1 too short. | Reconfigure the T1 timeout period to a longer value: refer to the TIMERS T1 command in the setup.x25 file. |
| An X.25 Reset Request packet is sent with diagnostic code 0x01. | The layer 3 default window size configuration is incorrect (too small).. | Reconfigure the layer 3 window size: refer to the WINDOW LEVEL3 NORMAL command in the setup.x25 file. |
| An X.25 Reset Indication packet is received with diagnostic code 0x01. | The layer 3 default window size configuration is incorrect (too large). | Reconfigure the layer 3 window size: refer to the WINDOW LEVEL3 NORMAL command in the setup.x25 file. |
| When receiving bulk data (for example, when connected to a data feed service), data transfer is slower than is expected. | The layer 3 default window size configuration is incorrect (too large). | refer to the WINDOW LEVEL3 NORMAL command in the setup.x25 file. Caution: if you decrease the window size too much, you may get a different problem (see above). |
| When transmitting, bulk data transfer is slower than is expected. | The layer 3 default transmit window size configuration is incorrect (too small). | Reconfigure the layer 3 window size: refer to the WINDOW LEVEL3 NORMAL command in the setup.x25 file. Caution: if you increase the window size too much, you may get a different problem (see above). |
| An X.25 Reset Request packet is sent with diagnostic code 0x27. | The layer 3 default packet size configuration is incorrect (too small). | Reconfigure the layer 3 packet size: refer to the PACKET SIZES NORMAL command in the setup.x25 file. |
| An X.25 Reset Indication packet is received with diagnostic code 0x27. | The layer 3 default packet size configuration is incorrect (too large). | Reconfigure the layer 3 packet size: refer to the PACKET SIZES NORMAL command in the setup.x25 file. |
| During data transfer, a FRMR frame with the Y-bit set is sent (resulting in the link being restarted and the call being cleared). | The layer 3 default packet size configuration is incorrect (too small). | Reconfigure the layer 3 packet size: refer to the PACKET SIZES NORMAL command in the setup.x25 file. |
| During data transfer, a FRMR frame with the Y-bit set is received (resulting in the link being restarted and the call being cleared). | The layer 3 default packet size configuration is incorrect (too large). | Reconfigure the layer 3 packet size: refer to the PACKET SIZES NORMAL command in the setup.x25 file. |