Hi,

On 2016年02月06日 01:58, David Gabriel wrote:
> Dears
> 
> Is it possible to update/modify one entry by adding new action ?
> Please tell me the how to ?

AFAIK, it is NOT possible.

OpenFlow Spec 1.3.5 says:
---
6.4 Flow Table Modification Messages
  ...
  For modify requests (OFPFC_MODIFY or OFPFC_MODIFY_STRICT), if a matching 
entry exists in the table,
  the instructions field of this entry is replaced with the value from the 
request, whereas its
  cookie, idle_timeout, hard_timeout, flags, counters and duration fields are 
left unchanged.
  ...
---

So, FlowMod messages will replace the entire actions(instructions) in the 
matching entry with the
value from the request.

If you want to "append" new actions into the existing entry, just an idea,
How about getting the existing entry by FlowStats messages first, then creating 
FlowMod messages
using the actions from FlowStats reply body.

Thanks,
Iwase

> 
> Thanks in advance.
> Regards
> 
> 
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