Josh, thanks. Now, when i ping B from A, A can receive some ARP requests but ok=false, so A Will not send ARP reply. With the same setting, i use the benchmark, A can receive almost all the packets from B and ok=true. I think there must be some difference between benchmark and tunnel. Who can explain this,？ 在 2012-7-12 下午4:57，"Josh Blum" <[email protected]>写道：
> > > On 07/11/2012 08:57 PM, CHAO DONG wrote: > > Dear all, > > > > I am testing tunnel.py in the narrowband folder, the > > configuration is as follows: > > OS: ubuntu 11.10 > > Gnuradio: latest > > UHD:latest > > USRP 1 > > RFX400 > > > > I set up two machines and do following the readme step by step. > > When i ping machine B from A, A shows it has sent the ARP request, but > > no ARP reply received. > > In fact, B did not receive the ARP request at all. > > > > I use benchmark_rx and benchmark_tx to test the channel, it is ok. > > > > And when i use: sudo ifconfig gr0 192.168.200.1 on A, B can receive > > the IGMP packet from the gr0 of A. This show the gr0 on A and B is ok > > for IGMP protocol. > > > > Welcome any comments! > > > > I recall a similar discussion, and one simple solution was to use a > different frequency for each communication channel. > > So for communication between A -> B use frequencyX > and for communication B -> A use frequencyY. > > I hope that helps! > -josh >
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