Hi, Hirasawa-san
Thanks for your reporting!
I want to confirm and inspect the problem in my environment,
so could you send me the packets that causes the problem?
Thanks
Fujimoto
On 2017年11月29日 18:20, Takayoshi Hirasawa wrote:
Hello
We are worried about ryu hanging up when certain packets are packet-in
to ryu.
I am considering an architecture that controls openflow channel with
ryu and OVS.
ryu-ovs picks up all packets to ryu by packet-in operation, and
re-releases it from ryu-ovs after looking up the destination at ryu.
Specifically, it has the following structure.
(this time, we control openflow channel between ovs and ONOS
controller by ryu&ryu-ovs.)
|ryu|
||
|| ryu-OFchannel
||
|ONOS| <===============|ryu-ovs|================> |ONOS-OVS|
ONOS-OFchannel ONOS-OFchannel
When connecting ONOS-OVS, we confirmed the connection of
ONOS-OFchannel at first.
However, when packets exceeding the MTU of ryu-ovs came from ONOS-OVS,
they segmented in the TCP layer and packeted in to ryu, the ryu freezed.
In addition, the CPU & memory usage rate of ryu-manager is close to 100%.
ONOS-OFchannel, ryu-OFchannel and subsequent connection became
disconnected.
As a result of checking with packet capture, the segmented packet
correctly packet-in from ryu-ovs to ryu, but it seems that ryu does
not respond from the moment when the segmented packet packet-in.
How can we solve this?
I will attach a python script (rebuilt version of simple_switch_13)
that I am running on ryu.
Thank you.
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