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running ./learn.py throws "socket.error: [Errno 100] Network is down" (Ethernet-Learning-Switch) #12

Closed hendrikzuellig closed 5 years ago

hendrikzuellig commented 5 years ago

I successfully completed the "Assignment 1: Switch Calculator" and "Assignment 3: In-band Network Telemetry (INT)". "Assignment 2: TCP Monitor" was not working for the same reason the Ethernet-Learning-Switch is not working (I believe). When i execute the last step i get the following error. Same error for Setp 5 from TCP Monitor Assignment Any ideas?

root@System:~/projects/P4-NetFPGA-live/contrib-projects/sume-sdnet-switch/projects>/learning_switch/sw/learning_sw# ./learn.py loading libsume.. loading libcam.. Traceback (most recent call last): File "./learn.py", line 80, in main() File "./learn.py", line 76, in main sniff(iface=DMA_IFACE, prn=learn_digest, count=0) File "/usr/lib/python2.7/dist-packages/scapy/sendrecv.py", line 577, in sniff p = s.recv(MTU) File "/usr/lib/python2.7/dist-packages/scapy/arch/linux.py", line 485, in recv pkt, sa_ll = self.ins.recvfrom(x) socket.error: [Errno 100] Network is down```

sibanez12 commented 5 years ago

Make sure that the you see the nf0 interface when you run ifconfig. If you don't then try running # ifdown nf0 && ifup nf0

hendrikzuellig commented 5 years ago

@sibanez12 Thank's! It's working now.

nniranjhana commented 5 years ago

That's great, I'm closing the issue now as it's resolved by @sibanez12 .

hendrikzuellig commented 5 years ago

I tried to run the TCP Monitor but the ifdown nf0 && ifup nf0 trick didn't help there. (the learning switch is working tough)