Re: [Ryu-devel] FWD:[Adding queue to a switch using RYU QoS]

[Iwase Y. <iwa...@gm...>]

Hi,


On 2016年04月25日 15:08, Malekloo, Ashkan wrote:
> Hi,
>
> Thanks for your response.
>
> I would appreciate if could help me on something else. I have a scenario in which I want to change the third scenario of RYU SDN Framework book QoS chapter that described the Meter based QoS. In my scenario I have two queues, EF and AF, on my switches. On the starting node of my flows I want to check these queues and see whether the delay (or rate) of my EF queue degraded or not. If it is the case I want to remark the flows that relates to EF to AF until the EF queue delay gets back to its normal condition.
>
> Considering the aforementioned scenario,

If you could configure queues for AF and EF,
I think you should map DSCP value to these queues first,
then, install QoS rules.

e.g.)
========== ==== ======== ========
(Priority) DSCP Queue ID (QoS ID)
========== ==== ======== ========
1          BE   1        1
1          EF   2        2
========== ==== ======== ========

In "Example of the operation of QoS by using Meter Table",
the bandwidth of the traffic s1->h1 is separated by the queues of s1.
So, I think whether the delay (or rate) of EF queue degraded or not are
depending on the s1 queues setting.

>
> 1) Can I implement this scenario using just the rules of meter? If so please kindly help me find the right rules to help me achieve this.

I think you can.
Please refer to the following API reference.
   http://osrg.github.io/ryu-book/en/html/rest_qos.html#set-a-qos-rule

Thanks,
Iwase

> 2) otherwise, if you think I need to change the source code, what is the appropriate source code module that I need to manipulate.
>
> Thanking you in advance,
> Ashkan
>
>
>> On Ordibehesht 6, 1395 AP, at 5:25 AM, Iwase Yusuke <iwa...@gm... <mailto:iwa...@gm...>> wrote:
>>
>> Hi,
>>
>> On 2016年04月23日 06:53, Isaku Yamahata wrote:
>>> ----- Forwarded message from "Malekloo, Ashkan" <ASH...@UC... <mailto:ASH...@uc...>> -----
>>>
>>> Date: Fri, 22 Apr 2016 20:27:53 +0000
>>> Subject: Adding queue to a switch using RYU QoS
>>> x-mailer: Apple Mail (2.3124)
>>>
>>> Hello,
>>> Hope you are doing well.
>>>
>>> I am using Ryu QoS on ubuntu 14.04 and mininet 2.2.1
>>>
>>> All I've done is use the exact commands as said in the RYU SDN Framework book. and after this command:
>>> curl -X POST -d '{"match": {"ip_dscp": "26"}, "actions":{"queue": "1"}}' http://localhost:8080/qos/rules/0000000000000001
>>>
>>> I gtt this error:
>>> Invalid rule parameter
>>>
>>> So, I've restarted everything then I tried Qos per-flow. like before I used ecaxt command as RYU SDN Framework book. After this command:
>>> curl -X POST -d '{"match": {"nw_dst": "10.0.0.1", "nw_proto": "UDP", "tp_dst": "5002"}, "actions":{"queue": "1"}}' http://localhost:8080/qos/rules/0000000000000001
>>>
>>> I’ve got the exact same error as before:
>>> Invalid rule parameter
>>
>> A "numeric string" like {"queue": "1"} causes this problem.
>> First, please try with non-string number like {"queue": 1}.
>>
>> To fix this problem, I wrote the following patch,
>> but please note this patch is under reviewing in our team.
>>
>>
>> From 5bb93cca1dd5747be854737c6b78f8c2bb4f7532 Mon Sep 17 00:00:00 2001
>> From: IWASE Yusuke <iwa...@gm... <mailto:iwa...@gm...>>
>> Date: Thu, 7 Apr 2016 11:46:00 +0900
>> Subject: [PATCH] ofctl_utils: Enhance user value conversion
>>
>> Currently, OFCtlUtil._reserved_num_from_user() fails to convert
>> an user specified value when it is a numeric string.
>> This patch enhances this conversion to enable to convert an user
>> value as follows.
>>
>> e.g.)
>> - Integer: 1 -> 1
>> - Numeric string: "1" -> 1
>> - Reserved number: "OFPP_ANY" -> 0xffffffff
>> - Invalid value: "foobar" -> "foobar" (do not conversion)
>>
>> Signed-off-by: IWASE Yusuke <iwa...@gm... <mailto:iwa...@gm...>>
>> ---
>> ryu/lib/ofctl_utils.py | 19 ++++++++++++-------
>> 1 file changed, 12 insertions(+), 7 deletions(-)
>>
>> diff --git a/ryu/lib/ofctl_utils.py b/ryu/lib/ofctl_utils.py
>> index b5fbc9b..832baf0 100644
>> --- a/ryu/lib/ofctl_utils.py
>> +++ b/ryu/lib/ofctl_utils.py
>> @@ -240,13 +240,18 @@ def __init__(self, ofproto):
>>             'OFPQCFC_EPERM']
>>
>>     def _reserved_num_from_user(self, num, prefix):
>> -        if isinstance(num, int):
>> -            return num
>> -        else:
>> -            if num.startswith(prefix):
>> -                return getattr(self.ofproto, num)
>> -            else:
>> -                return getattr(self.ofproto, prefix + num.upper())
>> +        try:
>> +            return str_to_int(num)
>> +        except ValueError:
>> +            try:
>> +                if num.startswith(prefix):
>> +                    return getattr(self.ofproto, num.upper())
>> +                else:
>> +                    return getattr(self.ofproto, prefix + num.upper())
>> +            except AttributeError:
>> +                LOG.warning(
>> +                    "Cannot convert argument to reserved number: %s", num)
>> +        return num
>>
>>     def _reserved_num_to_user(self, num, prefix):
>>         for k, v in self.ofproto.__dict__.items():
>>
>>
>>
>> Thanks,
>> Iwase
>>
>>
>>>
>>> on the other hand, when I use "mark" in my actions command it easily adds the rule and I can confirm it using get.
>>>
>>> can you help me please solve this?
>>> Thank you in advance!
>>>
>>> ----- End forwarded message -----
>
>
>
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