How to simulate/generate RTP packet flow from one router to another?

[amine..dahel]

Hi everybody,

I'm working on quite complex IP network, I don't have a full visibility on the whole network elements (routers, switches, firewalls) a literal cloud.

I'm supervising VoIP network, I got two IP phones on two different sites, if one phone calls the other, the call is established but no voice is heard on both IP phones.

I need to make sure that RTP packets are routed properly between both routers, one on each sites.

Can you, guys, show me how to simulate / generate RTP packet flow from one router to the other and see if the packet are routed properly.

Thank you, guys, in advance.

[Venkatesh Perumal]

Hi Amine,

if there is no audio on both end then there could be an possible issue with the media resource/capability such as Codec negotiation, since the call is established with no audio. let us know the model of phones you are using and the call agents for furhter analysis.

if its Cisco IP Phones then toggle twice on the (?) button to see what all codecs are being advertised by the phones.  you can follow the below threads to collect the packet captures from both the phones and the switch it is connected to get the packet flow.

https://supportforums.cisco.com/document/44741/collecting-packet-capture-cisco-ip-phone

https://supportforums.cisco.com/document/139686/configuration-example-embedded-packet-capture-cisco-ios-and-ios-xe

Venkatesh

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