Spanning tree is the short (not complete) answer.
The problem is that mac_learning uses the action flood for ARP packets.
I'm not 100% sure on the solution.
Flávio Castro Jr.
MSCS student at Georgia Tech
B.S.E in Networks Engineering from the University of Brasilia.
CCNA Certified
(404) 660-9373
On Tue, Jan 20, 2015 at 3:59 AM, Jordi Baranda <[email protected]>
wrote:
> Dear all,
>
> I am new in this world of SDN and based upon some comments on the net and
> I decided to start by using the Ryu/mininet/ovs friendly environment to
> start with it. After reading the Ryubook I am trying to develop my own
> application which tries to exploit the redundancy in a multipath topology
> to perform load balancing in a round robin fashion.
> Then, I create the topology the following topology in mininet (sorry for
> the ASCII type draw)
>
> h3 --- s3 -------- s4 ------- h4
> | |
> | |
> h1----s1-----------s2 ------- h2
>
> When I run the simple_switch Ryu app, I started to see a lot of packet-in
> events. There was a storm of ARP broadcast packets which are overloading
> the controller. Reading in the Ryubook I saw that the spanning tree
> protocol handles this, but as far as I have understood this is not suitable
> to exploit multipath topologies.
>
> Does anyone have an idea on how to avoid this storm of broadcast ARP
> requests?
> My first approach was to cache the appearance of broadcast ARP classifying
> them by [datapath id (switch), src_ip, dst_ip] with the hope that they
> were only broadcast once at each switch but I think I have not been able to
> properly implement it.
> I think the other problem is that I have to provide a route, isn't it? I
> was thinking on using the NetworkX library for such purpose.
>
> Any hint will be welcome
>
> Thank you very much for your time and attention
>
> Jordi
>
>
> ------------------------------------------------------------------------------
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>
------------------------------------------------------------------------------
New Year. New Location. New Benefits. New Data Center in Ashburn, VA.
GigeNET is offering a free month of service with a new server in Ashburn.
Choose from 2 high performing configs, both with 100TB of bandwidth.
Higher redundancy.Lower latency.Increased capacity.Completely compliant.
http://p.sf.net/sfu/gigenet
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