[j-nsp] srx packet capture on tunnel interface - unknown protocol

[pkc_mls]

Hi,

I'm trying to capture traffic on srx tunnel interface.

The cap file is correctly generated, but when I try to open it using 
tcpdump or wireshark, the tool complains and indicates "unknown 
protocol" for all traffic.

Did anyone manage to capture traffic correctly on an unumbered tunnel 
interface ?

Shall I add an IP to the st0.0 to make it work ?

Thanks.