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OFDPA TTP with ODL controller
kals
Hi experts,
I am trying to integrate OFDPA2.0 switch (with Indigo agent) with OpenDayLight controller.
(1) Could someone explain me / point out how a switch and controller would exchange TTP ? Just want to understand Switch and Controller negotiation on TTP.
(2) I know, I need to write a new TTP for a specific application. But, how to load the written TTP into the switch ? How switch would exchange it to controller ?
Thanks,
__Kals__
Rob Sherwood <rob.sherwood@...>
Hi Kals,
A lot of folks and mailing lists on this CC - IMHO the ONL mailing list (http://opennetlinux.org/community) is probably the best place for this.
For (1), I believe in theory there are protocols built into OFConfig (a completely separate data channel) to get which TTP a switch supports and to select which one to use. Currently, OFDPA2.0 only supports a single TTP so this is less important of a step. Further, the Indigo OpenFlow agent doesn't implement OFConfig (happy to accept the patch), so this information isn't available through the switch agent anyway. Best bet is to dynamically pull from the website: https://raw.githubusercontent.com/Broadcom-Switch/of-dpa/master/OF-DPA-2.0/ofdpa-v2.0.0.2.ttp.json
For (2), you don't/can't write a TTP for an application- it's the other way around. You write an application to a TTP. Perhaps you're thinking of P4 where you write a P4 description of what you want the switch to do? As I mentioned above, while the underlying Broadcom hardware can in theory support many many TTPs, OFDPA doesn't expose any of those knobs to you, so there's only effectively the one TTP available. In other words, you have to think about how to use the existing tables exposed by OFDPA and figure out how to manage them to support your application.
On the last part, I and my team have written a couple of applications on top of OFDPA, so if you want to post to the ONL mailing lists, we'd be happy to help you think this through.
Hope this helps,
- Rob
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On Wed, Dec 30, 2015 at 11:17 PM, tech_kals Kals <tech.kals@...> wrote:
Hi experts,I am trying to integrate OFDPA2.0 switch (with Indigo agent) with OpenDayLight controller.(1) Could someone explain me / point out how a switch and controller would exchange TTP ? Just want to understand Switch and Controller negotiation on TTP.(2) I know, I need to write a new TTP for a specific application. But, how to load the written TTP into the switch ? How switch would exchange it to controller ?Thanks,__Kals__