[strongSwan] After I established IPsec tunnel, GTP-U data is not able to be transmitted.

[Jessie Liu]

Dear all,
     I set up an environment with a tunnel established between a device A and a security gateway B,
device C is behind gateway B. If the tunnel is not established, the gtp tunnel between device C
and device A could be established successfully and the data traffic could be transported. But after 
the ipsec tunnel is established between device A and gateway B, the gtp tunnel seems not 
established successfully. Is there any routing issues I should check or any other suggestion?
Thanks.
 


      
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