Inline:
Dear martin,
Thanks for your reply. We just think when the network environment
contains more than 2 NOXs, what is the behavior between them? So, NOX
do not do the load balance currently?
Correct, Nox does not support multiple instances working together. For
that, you will have to extend Nox.
By the way, We still have some questions which need to your help.
1) What is the process that NOX want to build its controlled OpenFlow
switches topology? NOX will send an event to notify all controlled
OpenFlow switches, then all OpenFlow switches will send LLDP out from
their owned ports to all connected switches?
Right. Nox sends out LLDP packets from every switch port and then
listens for incoming LLDP packets on neighbor switches to determine the
topology.
2) The discoveried topology will be stored on NOX?
Correct.
3) Support we have a network topology, which showed below, these
OpenFlow switches are all controlled by one NOX. What do the NOX write
into the flowtables of these OpenFlow switches when user ping host2
from host1?
host1 -- ofsw1 ------- ofsw2
| |
| |
ofsw3 ------- ofsw4 -- host2
Nox doesn't support topologies with loops (though there are a number of
spanning tree implementations which have been ported to it) so this
would not work. However, if there wasn't a loop, then nox would set up
flows for the ARP and ICMP packets in both directions.
.martin
We really appreciate to all the help you gave us.
Best,
JW
On Fri, Mar 26, 2010 at 5:55 AM, Martin Casado <[email protected]
<mailto:[email protected]>> wrote:
Hi JW,
Nox was not built to support coordination between two instances.
Why don't control both switches from the same Nox process?
.martin
Dear all,
We just join the world of OpenFlow and NOX lately. Everything
for us is new and also doesn't know how to start. Currently,
we have built the enviroment which contains 1 NOX (nox1), 1
OpenFlow switch with NetFPGA (ofsw1), and 2 hosts which
connect to ofsw1. After installing, we got some quesions about
it. Could someone could help us?
(current)
nox1 -- ofsw1
|--- host1
|--- host2
(suppose)
nox1 -- ofsw1 ----------------- ofsw2 -- nox2
|--- host1
|--- host2
1. Suppose we add 1 OpenFlow switch (ofsw2) and 1 NOX (nox2),
let this ofsw2 connects to nox2 and sw1. The LLDP will let
nox1 discover ofsw1, how let nox1 also discovery ofsw2?
2. Does nox1 could discover nox2?
3. The packages between ofsw1 and ofsw2 are using OpenFlow
protocol? And how about nox1 and nox2?
Thanks
Bests,
JW
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