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rpl-border-router with srf06-cc26xx

Hi I working with rpl-border-router and srf06-cc26xx. Now, the my goal is ping the rpl-border-router to another network for examples to webiste ping on web. I want to set the border-router with ipv6 global. I make this step: 

1) Generate rpl-border-router 

2) connect the device to raspberry

3) cd contiki/tools 

3) sudo make ./tunslip6

4) sudo ./tunslip6 fd00::1/64 -s /dev/ttyUSB0

5) with another windows, open terminal and write:  sudo ./tunslip6 -s /dev/ttyUSB0 -t tun08 fd00:212:4b00:0f6::9079/64 

6) Open browser and I see the rpl-border-router but If i ping with another network, the packet is all loss. 

Why?