[pox-dev] Error while setting up PoX controller with GENI-based fat-tree topology

[Sadia Bashir]

Hi Murphy,

Thanks a lot for your suggestion. The problem is resolved now after I used
the following command to run PoX on the controller node:
./pox.py forwarding.l2_learning openflow.discovery --eat-early-packets
openflow.spanning_tree --no-flood --hold-down

by following this <https://github.com/noxrepo/pox/issues/139> link but
still hosts are unable to communicate.



On Sun, Aug 16, 2015 at 2:51 AM, Murphy McCauley <murphy.mccauley at gmail.com>
wrote:

> Pleases see the "I'm seeing many packet_in messages and forwarding isn't
> working; what gives?" and "Does POX support topologies with loops?"
> questions in the FAQ.
>
> -- Murphy
>
> On Aug 15, 2015, at 2:11 AM, Sadia Bashir <11msccssbashir at seecs.edu.pk>
> wrote:
>
> Hello,
>
> I have set up fat-tree topology using InstaGENI aggregate, pls see file
> attached for more detail.
>
> I am setting up edge, aggregate and core switches using following set of
> commands:
>
> ovs-vsctl add-br br0
> ifconfig eth1 0
> ifconfig eth2 0
> ifconfig eth3 0
> ifconfig eth4 0
> ovs-vsctl list-br
> ovs-vsctl add-port br0 eth1
> ovs-vsctl add-port br0 eth2
> ovs-vsctl add-port br0 eth3
> ovs-vsctl add-port br0 eth4
> ovs-vsctl list-ports br0
> ifconfig eth1 0 up
> ifconfig eth2 0 up
> ifconfig eth3 0 up
> ifconfig eth4 0 up
> ovs-vsctl set-controller br0 tcp:<controller IP>:6633
> ovs-vsctl set bridge br0 protocols=OpenFlow10
> ovs-vsctl set-fail-mode br0 secure
>
> I have set up a POX(dart) controller with public IP and running
> forwarding.l2_learning on it:
> ./pox.py log.level --DEBUG pox.forwarding.l2_learning
>
> all edge, aggregate and core nodes are running ovs 2.3.1 version.
>
> But firstly, I am not able to ping/iperf between two hosts and secondly,
> the controller runs with this error:
>
> ERROR:openflow.of_01:[62-75-7f-15-b9-4d 14] OpenFlow Error:
> [62-75-7f-15-b9-4d 14] Error: header:
> [62-75-7f-15-b9-4d 14] Error:   version: 1
> [62-75-7f-15-b9-4d 14] Error:   type:    1 (OFPT_ERROR)
> [62-75-7f-15-b9-4d 14] Error:   length:  36
> [62-75-7f-15-b9-4d 14] Error:   xid:     118250
> [62-75-7f-15-b9-4d 14] Error: type: OFPET_BAD_REQUEST (1)
> [62-75-7f-15-b9-4d 14] Error: code: OFPBRC_BUFFER_UNKNOWN (8)
> [62-75-7f-15-b9-4d 14] Error: datalen: 24
> [62-75-7f-15-b9-4d 14] Error: 0000: 01 0d 00 18 00 01 cd ea  00 00 05 d4
> 00 02 00 08   |................|
>
> Any help/suggestion to fix this issue is much appreciated. OR if anyone in
> the list has experience with setting up GENI topologies can point a problem
> in the steps I am following. PS the same steps work fine with simple
> GENI-topology(3 hosts, 1 switch, 1 controller).
>
>
> Thank you,
> *Sadia Bashir*
>
> --
>
>
> <GENI Final Fat-tree Topology.png>
>
>
>


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