Hi,
ok, I got it to work now. It was a problem on our side. In fact, the
switches in the lab are connected by an HP ProCurve switch, which i
have configured to use VLANs for every "link" between the OpenFlow
switches.
After configuring the HP switch in the correct way, everything worked :)
So, I read in the wiki, that the Spanning Tree module was only tested
with three switches. I can confirm it works flawlessly with six
switches.
Thanks for your quick answer.
Best regards
Bernd
Zitat von Murphy McCauley <jam...@nau.edu>:
AFAIK, this should work. Have you actually inspected the switches?
Are the relevant ports actually getting NOFLOOD set?
-- Murphy
On Nov 29, 2011, at 7:54 AM, Bernd Wittefeld wrote:
Hi,
first of all: thanks for your great work and the really good support
here. I have a small problem and I hope someone knows what to do :)
The situation is the following:
I have a network with 6 OpenFlow switches in a mesh here. The software
(switches and NOX) is working fine.
I use the spanning_tree module in order to prevent loops in the network
when flooding ARP-Requests and stuff.
I got everything to work fine and even the NOX Gui (I'm on destiny)
shows me a correct Spanning-Tree without loops.
I have two hosts which are connected to two different switches. If I
send an ICMP ping from one host to the other, I get the ARP requests in
the Openflow network. They travel along the spanning tree which I
checked by using wireshark and tcpdump. The other links don't show ARP
requests.
Now the problem:
The ARP requests are not forwarded out of the OpenFlow network. That
means, they reach the switch that is connected to the destination host,
but the host does not get the ARP request.
How can I solve this? Do I have to "manually" unset the NOFLOOD switch
on that port in my controller or is there any other way, maybe to make
the spanning_tree module more intelligent or am I doing something wrong?
Thanks in advance
Bernd
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