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Re: [forces] [Sdnp] a few initial comments on draft-haleplidis-forces-openflow-lib-00

Zoltán Lajos Kis <zoltan.lajos.kis@ericsson.com> Fri, 01 June 2012 10:31 UTC

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From: Zoltán Lajos Kis <zoltan.lajos.kis@ericsson.com>
To: Jamal Hadi Salim <hadi@mojatatu.com>
Date: Fri, 01 Jun 2012 12:31:27 +0200
Thread-Topic: [forces] [Sdnp] a few initial comments on draft-haleplidis-forces-openflow-lib-00
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Cc: "sdnp@lucidvision.com" <sdnp@lucidvision.com>, "forces@ietf.org" <forces@ietf.org>
Subject: Re: [forces] [Sdnp] a few initial comments on draft-haleplidis-forces-openflow-lib-00
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> -----Original Message-----
> From: Jamal Hadi Salim [mailto:hadi@mojatatu.com] 
> Sent: Thursday, May 31, 2012 7:16 PM
> To: Zoltán Lajos Kis
> Cc: Haleplidis Evangelos; forces@ietf.org; sdnp@lucidvision.com
> Subject: Re: [forces] [Sdnp] a few initial comments on 
> draft-haleplidis-forces-openflow-lib-00
> 
> On Thu, May 31, 2012 at 12:07 PM, Zoltán Lajos Kis 
> <zoltan.lajos.kis@ericsson.com> wrote:
> > Hi,
> >
> > Yes, the interpretation is correct. If the apply-actions' 
> action list contains an output or group action, a copy of the 
> current packet (i.e., the previous actions in the action list 
> have been applied) are sent to the port or group, as if the 
> packet reached the end of the pipeline. The pipeline 
> processing will continue with the original copy with the next 
> action in the action list.
> >
> 
> Is it correct to conclude that the apply-actions cannot 
> terminate a flow pipeline?
> 

Correct, pipeline processing ends (and processing of the action set begins) if:
a) a matching entry was found, and the entry has no Goto (to the next table) instruction, OR
b) no matching entry was found, and the table miss behavior is not to Continue (to the next table)

Note that in OF 1.3 the table miss behavior configuration has been replaced with a table miss flow entry.
This allows one to describe the miss behavior using the instruction semantics of flow entries.

Regards,
Zoltan.

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