Thanks alot.. It works fine now..
On Thu, May 30, 2013 at 12:25 PM, Murphy McCauley <murphy.mccau...@gmail.com
> wrote:
> From *not* inside Mininet itself (just from a shell prompt on the
> machine/VM where you have Mininet installed), try ovs-ofctl dump-flows s1.
>
> -- Murphy
>
> On May 30, 2013, at 3:20 AM, Windhya Rankothge wrote:
>
> I am sorry to trouble you again..
>
> I created my topology in mininet with POX as the remote controller..
>
> Then I issued following command on mininet
> mininet> s1 ovs-ofctl show tcp:127.0.0.1:6633
>
> Then I get the following error in POX terminal
>
> ERROR:openflow.of_01:[None 4]: Exception while handling OpenFlow message:
> [None 4] ofp_features_request
> [None 4] header:
> [None 4] version: 1
> [None 4] type: 5 (OFPT_FEATURES_REQUEST)
> [None 4] length: 8
> [None 4] xid: 1
> Traceback (most recent call last):
> File "/home/u99319/pox/pox/openflow/of_01.py", line 749, in read
> h(self, msg)
> TypeError: 'NoneType' object is not callable
>
> Please be kind enough to help me with this.. Where I am going wrong ?
>
>
>
>
>
> On Thu, May 30, 2013 at 10:31 AM, Murphy McCauley <
> murphy.mccau...@gmail.com> wrote:
>
>> The interfaces on s0 and s1 that connect to the other nodes in your
>> topology are part of an Open vSwitch datapath. Thus, packets on them do
>> not go through the normal Linux networking stack and do not have
>> corresponding entries in the Linux routing table. Instead, they are
>> processed by OVS's tables. You can view these with the OVS tools, e.g.,
>> ovs-ofctl.
>>
>> If you want to check the path of a packet, you can also pay attention to
>> which table entries POX actually sends to the switches...
>>
>> -- Murphy
>>
>> On May 29, 2013, at 11:42 PM, hansinie vitharana wrote:
>>
>> > Hi,
>> > I am very new to POX and mininet and I have a small question about
>> routing tables
>> > I create following topology
>> > h1 --- s0 ----- s1 --- h2
>> >
>> > h1 = net.addHost('h1',ip='10.1.0.1')
>> > h2 = net.addHost('h2',ip='11.1.0.2')
>> > So h1 and h2 are in two different subnets..
>> > I run the mininet script with POX contoller and I am using l2_learning
>> in POX controller.
>> > Then I give following commands in mininet, so i can have connectivity
>> between subnets
>> >
>> > mininet> h1 route add -net default h1-eth0
>> > mininet> h2 route add -net default h2-eth0
>> > when I ping from h1 to h2, its sucessful
>> >
>> > when I look at the routing table of h1
>> >
>> > mininet> h1 route
>> > Kernel IP routing table
>> > Destination Gateway Genmask Flags Metric Ref Use
>> Iface
>> > default * 0.0.0.0 U 0 0 0
>> h1-eth0
>> > 10.0.0.0 * 255.0.0.0 U 0 0 0
>> h1-eth0
>> >
>> > when I look at the routing table of switch s0
>> >
>> > mininet> s0 route
>> > Kernel IP routing table
>> > Destination Gateway Genmask Flags Metric Ref Use
>> Iface
>> > default 10.80.7.245 0.0.0.0 UG 0 0 0
>> eth0
>> > 10.80.4.0 * 255.255.252.0 U 1 0 0
>> eth0
>> > link-local * 255.255.0.0 U 1000 0 0
>> eth0
>> > As far as I know when h1 ping to h2, S0 switch should learn about the
>> new network and its routing table should include information about 11.0.0.0
>> network..
>> > But even after ping, there is no entry for 11.0.0.0 in S0
>> > Am I missing something here ? Whats wrong with the routing table ?
>> > I want to check the path of the packet and thats why I am looking at
>> the routing tables.. Is there any other way to check the path of the
>> packets ?
>>
>>
>
>
> --
> Best Regards,
>
> Windhya Rankothge..... (WINDY)
>
>
>
--
Best Regards,
Windhya Rankothge..... (WINDY)
