Hi, I am trying to implement a static L3 Switch using NOX in Python. I have hardcoded the IPs and hence I do not perform any 'IP learning' as such. My network topology looks as below.
Switch2<---------->Switch3 | | | | H1 H4 When Host1 tries to ping H4 i.e. an ICMP req to H4. The controller ensures the destination mac address in this request is that of H4's; installs a flow in Switch2 and forwards the packet to the next hop i.e. Switch3. At Switch3 the arriving ICMP req has no flow entry and hence is sent to controller. The controller again checks against its IP table and installs a flow in Switch3 to finally forward the packet to the host at H4. I can see in my logs that a flow entry is being made for action on an appropriate port connecting to H4. However, I am expecting an ICMP echo reply from H4 to complete the ping process and I do not see that happenening...Is there a way to debug this, to actually see if an OF packet has been sent to the host at H4? Am I expected to handle ICMP requests? It would be great if you could help. Thanks, Rashmi
