Hi,
AFAIK, OpenFlow does not provide the feature for changing the priority without
changing the other fields.
So, you need to delete the previous flow which has priority=1 first,
then you need to add the new flow with the new priority for changing the
priority.
The following shows an image to implement it.
# Add a flow with the first priority
match = parser.OFPMatch(...)
actions = [...]
instructions = [...]
priority = FIRST_PRIORITY
mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
command=ofproto.OFPFC_ADD,
match=match, instructions=instructions)
datapath.send_msg(mod)
# Sleep
# Delete the previous flow with the same priority and match
mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
command=ofproto.OFPFC_DELETE,
match=match)
datapath.send_msg(mod)
# Then, add the new flow with the new priority
priority = NEW_PRIORITY
mod = parser.OFPFlowMod(datapath=datapath, priority=priority,
command=ofproto.OFPFC_ADD,
match=match, instructions=instructions)
datapath.send_msg(mod)
Thanks,
Iwase
On 2016年07月29日 20:41, [email protected] wrote:
> Hi
>
>
>
> I want to add a data flow with priority 1, and after passing 5 seconds I want
> to change its priority to 10. I have used the following code to implement
> this concept. But, it is not working :)
>
> -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> match = parser.OFPMatch(eth_src='01:00:00:00:01:00',
> eth_dst='02:00:00:00:02:00')
> actions = [parser.OFPActionOutput(2)]
> priority1 = 1
> command=ofproto.OFPFC_ADD
> inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
> self.add_flow(datapath, command, priority1, match, inst)
>
>
> time.sleep(5)
>
> flow_del = parser.OFPFlowMod(datapath=datapath, priority=10, match=match,
> command=ofproto.OFPFC_MODIFY, buffer_id= ofproto.OFP_NO_BUFFER,
> instructions=inst)
> datapath.send_msg(flow_del)
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> would you please show me the way to do it?
>
> Please note that as far as I know that the priority changing is not possible
> by using the "OPFActionsetfield" option. Because priority is not supported by
> the "OFPMatch".
>
>
> Thanks in advance.
> -Tanvir
>
>
>
>
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>
>
>
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