RTP over GTP with PCMU content- Disection

[NITIN GOYAL <nitinkumgoyal () gmail com>]

Hi

How the GTP-u content being dissected by Wireshark?

Is the content inside GTP-U also encrypted if i don't have the ipsec over
it?

I have some G711 PCMU content with GTP tunneling as shown by Wireshark but
i am seeing there are two packets with the same content everywhere but the
IPs are different.

I am not able to understand how this has been dis-sected and is
the content really encrypted or not as in generally the frame size of the
PCMU content is 160 bytes without RTP header but here i am seeing only 32
bytes without header.

Anyone has any idea on this GTP-U content or
can provide me some documents or resource to understand the same?

Thanks
Nitin

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