The network topology that i configured in Mininet is as below. Each host was configured with a default gateway.
h1<-->s2<-->s3<-->h4 h1 ifconfig h1-eth0 10.0.1.2/24 h4 ifconfig h4-eth0 10.0.2.2/24 h1 route add default gw 10.0.1.1 h4 route add default gw 10.0.2.1 and i tried to run: h1 ping -c1 h4 *- Rashmi* On Sun, Jul 22, 2012 at 11:47 PM, Murphy McCauley <[email protected] > wrote: > (Copying pox-dev) > > You mention both 10.0.2.2 and 10.0.1.2. Which is it? Did you use the > right one when testing? > > Also, can you explain exactly how you configured and started up Mininet? > > -- Murphy > > On Jul 19, 2012, at 5:28 PM, Rashmi Pujar wrote: > > I am a newbie to Openflow and I have been using the Openflow tutorial and > the VM image that comes along to get myself started....and hence continued > to use NOX > > To monitor the OF traffic between the controller and switch I used > Wireshary and the last OF traffic i saw was a OFP+ICMP Packet-In for > H1--->H4 from Switch3 port to Controller Port.. > For ARP requests sent from hosts to switches, I build an ARP reply to be > sent to the host. I can see OFP+ARP packet-in and out in Wireshark. > > I did try to execute a ping on the same network topology H1 (10.0.1.2)---> > H4(10.0.2.2) using the simple L3 switch in POX, however I could only see > ARP requests from H1 to S2. I don't see the reply being sent. I am not sure > where I am going wrong.. > > DEBUG:forwarding.l3_learning:2 1 flooding ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:3 1 ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:3 1 flooding ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:2 1 ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:2 1 flooding ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:3 1 ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:3 1 flooding ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:2 1 ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:2 1 flooding ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:3 1 ARP request 10.0.1.2 => 10.0.1.1 > DEBUG:forwarding.l3_learning:3 1 flooding ARP request 10.0.1.2 => 10.0.1.1 > > *- Rashmi* > > > On Thu, Jul 19, 2012 at 4:55 PM, Murphy McCauley < > [email protected]> wrote: > >> Do you have a good reason for using NOX-Classic? As we're no longer >> doing any development with it, you might think about using POX (which >> already contains a simple L3 switch). >> >> To more directly answer your question, you can use Wireshark to monitor >> the OpenFlow traffic between the controller and the switch. The OpenFlow >> reference implementation contains the OpenFlow dissector, and there's also >> a github project for it. >> >> What are you doing about non-IP traffic? More to the point, what are you >> doing about ARP? >> >> -- Murphy >> >> On Jul 19, 2012, at 4:46 PM, Rashmi Pujar wrote: >> >> > 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 >> > >> >> > >
