[Case Show] Interrupted Conversation Because of Improper QoS Configuration of th

小小小飞鱼
小小小飞鱼  Platinum  (1)
4 years 10 months ago  View: 1264  Reply: 8

This topic describes how to troubleshoot the fault when the conversation of an NGN user connected to an ONU is interrupted because the VoIP QoS of the ONU is configured improperly.

Fault Description
The conversation is interrupted intermittently when a user connected to an ONU makes a phone call during the running of the ONU.

Cause Analysis
The data configurations of the softswitch, OLT, or ONU are incorrect.
Congestion occurs on the link.
The configuration of the QoS is improper.

Procedure
1. Check the data configuration of the softswitch. It is found that the H.248 interface and signaling tracing are normal.
2. Check the data configuration of the OLT and the packet forwarding. It is found that the data configuration is normal, and packets are forwarded normally.
3. Capture packets on the ONU and softswitch sides. It is found that packet loss occurs from the ONU to the softswitch.
4. Check the data configuration of the ONU because network congestion occurs temporarily. It is found that qos vlan media 192.168.100.12 priority 0 exists in the data configuration, and the QoS priority is set to 0, which indicates the best effort mode and lowest priority. Therefore, if network congestion occurs, the VoIP packets may be discarded.
5. Change the priority of voip media of the ONU to 6. As a result, the fault is rectified.

Suggestion and Conclusion
The requirement of the voice service for the network quality is high. Therefore, it is recommended that you set the priority of voip media of the ONU to 6.

 
小小小飞鱼
小小小飞鱼  Platinum 
4 years 10 months ago

Hi,

Case show will be posted periodical, hope its hlepful

 

Best Regards.

George.Fellers
George.Fellers  Senior 
4 years 10 months ago
It is very useful to me.
小小小飞鱼
小小小飞鱼  Platinum 
4 years 10 months ago

Reply 3 #

Thank you for your feedback, please stay tuned for updates.
Ken_liu
Ken_liu  Gold 
4 years 10 months ago
Wonderful, its helpful to me.
Jonathan.Cohen
Jonathan.Cohen  Senior 
4 years 9 months ago
Good post! Its helpful.
小小小飞鱼
小小小飞鱼  Platinum 
4 years 9 months ago

Reply 6 #

Thank you for your feedback, please stay tuned for updates.
小小小飞鱼
小小小飞鱼  Platinum 
4 years 9 months ago

Reply 5 #

Thank you for your feedback.
user_2837311
user_2837311  Diamond 
1 year 6 months ago
useful document, thanks