Reflexive NAT not working for UDP traffic

[tamzida]

Hello,

In case UDP traffic of SIP service and other services reflexive NAT not working automatically.If I configure reflexive NAT manually the it is working.But since there is many IP phones natted with a single IP , manual configuration is not a solution.Can anyone suggest any option.

Thanks

[Chris_Atkinson]

Alot of work has gone into improving the VoIP experience in recent releases (sk176295), which version is the Gateway installed with?

[tamzida]

Quantum Spark 1600, version R80.20.35

My observation is that when configure only hide NAT UDP session not operational properly but if configure reflexive NAT for a single IP phone then this phone is fully operational.My observation is may be UDP traffic cannot track properly  in hide NAT.

[Chris_Atkinson]

Did you use the VoIP wizard to guide your configuration?

It was introduced starting in R80.20.35 though R80.20.40 is probably the recommended version at this time pending R80.20.50.

[Chris_Atkinson]

Please note R80.20.50 (sk179654) was recently released with the following enhancements:

VoIP enhancements

• Allows bidirectional traffic with the SIP service provider.

• Extend SIP service timeout.