Hello,
My name is Amauri and I am a Master degree student at TU-Berlin. I'm
developing an interface between a system (stratosphere.eu) and POX in order
to allow the system set flow on the fly in a fattree topology. I decided to
use POX to test the concepts, so I have made all tutorial on mininet and
implemented some basic controllers using POX. After that I created a
component in POX which accepts commands from the client to set flows. The
following is happening. When I set the flow using the client (using my
component), the flow is installed fine (according to the command dpctl ),
but the switch does not work. When I use the l2_pairs component, the same
flow is set and everything works fine. Am I missing something? Here is the
code and the logs for the tests. I appreciate any help.
Best regards
Amauri
Code
def setFlow(self, IP,outport,switch,macsrc,macdst):
#find the connection for switch
for conn in core.openflow.connections:
id=dpid_to_str(conn.dpid)
if id in switch:
msg=of.ofp_flow_mod()
#msg.priority=30000
#msg.match.dl_type=0x8100
#msg.match.nw_dst=IPAddr(IP)
mcrc=EthAddr(macsrc)
mcdst=EthAddr(macdst)
msg.match.dl_src=mcrc
msg.match.dl_dst=mcdst
portout=int(outport)
msg.actions.append(of.ofp_action_output(port=portout))
conn.send(msg)
Tests
#######
#using manual flow setting - my code
#######
mininet@mininet-vm:~$ dpctl dump-flows tcp:127.0.0.1:6634
stats_reply (xid=0x49a204a7): flags=none type=1(flow)
mininet@mininet-vm:~$ dpctl dump-flows tcp:127.0.0.1:6634
stats_reply (xid=0x2c2ca5ce): flags=none type=1(flow)
cookie=0, duration_sec=15s, duration_nsec=786000000s, table_id=0,
priority=32768, n_packets=0, n_bytes=0, idle_timeout=0,hard_timeout=0,*
dl_src=00:00:00:00:00:01,dl_dst=00:00:00:00:00:02,actions=output:2*
cookie=0, duration_sec=3s, duration_nsec=248000000s, table_id=0,
priority=32768, n_packets=0, n_bytes=0, idle_timeout=0,hard_timeout=0,*
dl_src=00:00:00:00:00:02,dl_dst=00:00:00:00:00:01,actions=output:1*
mininet@mininet-vm:~$
#Testing ping
mininet> h1 ping h2
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
>From 10.0.0.1 icmp_seq=1 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=2 Destination Host Unreachable
>From 10.0.0.1 icmp_seq=3 Destination Host Unreachable
^C
--- 10.0.0.2 ping statistics ---
6 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4999ms
pipe 3
#######
#using l2_pairs code
#######
mininet@mininet-vm:~$ dpctl dump-flows tcp:127.0.0.1:6634
stats_reply (xid=0xc38bf354): flags=none type=1(flow)
cookie=0, duration_sec=7s, duration_nsec=415000000s, table_id=0,
priority=32768, n_packets=5, n_bytes=434, idle_timeout=0,hard_timeout=0,*
dl_src=00:00:00:00:00:01,dl_dst=00:00:00:00:00:02,actions=output:2*
cookie=0, duration_sec=7s, duration_nsec=377000000s, table_id=0,
priority=32768, n_packets=6, n_bytes=476, idle_timeout=0,hard_timeout=0,*
dl_src=00:00:00:00:00:02,dl_dst=00:00:00:00:00:01,actions=output:1*
mininet@mininet-vm:~$
Testing ping
mininet> h1 ping h2
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
64 bytes from 10.0.0.2: icmp_req=1 ttl=64 time=1027 ms
64 bytes from 10.0.0.2: icmp_req=2 ttl=64 time=17.5 ms
64 bytes from 10.0.0.2: icmp_req=3 ttl=64 time=0.084 ms
64 bytes from 10.0.0.2: icmp_req=4 ttl=64 time=0.080 ms
^C
--- 10.0.0.2 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3010ms
