# Tunnel.py keep USRP transmitting UDP packets

**URL:** <https://www.ruby-forum.com/t/tunnel-py-keep-usrp-transmitting-udp-packets/231033>\
**Category:** GNU Radio\
**Created:** [July 17, 2014, 11:12pm UTC](https://www.ruby-forum.com/t/tunnel-py-keep-usrp-transmitting-udp-packets/231033 "2014-07-17T23:12:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [July 17, 2014, 11:12pm UTC](https://www.ruby-forum.com/t/tunnel-py-keep-usrp-transmitting-udp-packets/231033/1 "2014-07-17T23:12:16Z")

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Deal all,

When I run tunnel.py under the following path:  
gnuradio/gr-digital/examples/ofdm, the USRP N210 keep sending UDP  
packets  
to the computer through network interface card. It costs too much  
bandwidth  
(2MB/s) of the Ethernet controller. Attached is the captured packets on  
wireshark.

Is there anyone can help me with this problem?

Thanks,  
Sihua