I spoke with many producers (I don't want to say names here) and for the
moment their answer was that isolation of resources in their devices is
not guaranteed.
And even if part of them can isolate ports, they don't have a dedicated
ASIC, buffer, RAM, etc.. for OpenFlow.
Just vendor I know that can guarantee a kind of real isolation is
Brocade (i give you this name because is a good thing :D) that uses
NetFPGA on devices.
In the research environment the ALIEN project is invastigating about the
integration of OpenFlow and "common networks". reference:
http://wiki.ict-fire.eu/index.php/Abstraction_Layer_for_Implementation_of_Extensions_in_programmable_Networks
If anyone knows something more about resources isolation I would be as
well very interested.
Cheers,
Luca P.
Il 09/04/2013 12:08, Admin ha scritto:
Thanks for your opinion Luca.
I am reading it as: Be carefull before production use but some sort of
SDN capable switches would be a good choice anyway.
I have seen several use cases in the docs section where partitions of
the switches are managed with OpenFlow but not the whole network which
indeed implies that OpenFlow is currently not solely used to manage
network traffic. But the documents are from 2009 as far as i remember.
Your comment will affect my decision.
sincerely
Malte
Am 9.4.2013 11:46, schrieb Luca Prete:
Hi,
In my opinion OpenFlow is a great protocol, for the moment still in
evolution, born for campus LAN environments.
For the moment I wouldn't use (but maybe it's just for my current
abilities) OpenFlow for all my production environment.
I see OpenFlow as a first step of a long way of the SDN paradigm.
Many producers currently presents OpenFlow as their key, others
consider it a small part of their technology, introducing their own
SDN APIs and protocols, maybe better performing but locking you in
another time.
Anyway consider that OpenFlow currently works perfectly (as far as I
know..) in both big campus networks and test-bed in US (and probably
not only).
Now it's up to you ;)
Cheers,
Luca P.
Il 09/04/2013 11:19, Admin ha scritto:
Hi,
i read several articles on OpenFlow and like the concept behind it.
I run a small network at a school with 300 devices. Currently we use
10 years+ old dumb switches. At that time there were very few
notebooks and no smart phones or user provided/private devices. It
now becomes important for me to separate networks and secure some
parts of the network. To achive that, i have to replace most of the
switches (roughly 30, mostly 24 ports) anyway. I could simply use
radius and accoringly relativly cheap switches or i could use "layer
3 switches" and maybe manage the network traffic using OpenFlow.
Those switches are quite expensive it seems, starting from 1500
euros for 24 Ports, as far as i can see. I have one Cisco sg 300-28.
The idea of having to manage 20 of these type doesn't please me. I
find that centralized view provided by OpenFlow's controller quite
appealing.
Anyway, as you might have guessed, i'm far from being a network
wizard. Is OpenFlow a path i could go (after spending some time on
further researches, of course) or just an overkill?
Any comments are appreciated.
sincerely
Malte Müller
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