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

[Sadia Bashir]

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*

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