I tried to used OFPFF_SEND_FLOW_REM flag and also searched on net but
didn't get any specific answer. Please tell me how to use this flag? or
give me a link from which I can get help.
Thanks
On Sat, Nov 23, 2013 at 7:28 PM, Sayed Qaiser Ali Shah <
11msitqs...@seecs.edu.pk> wrote:
> I think so. I want to delete entry from dictionary defined on controller.
> Thanks. I will try this.
>
>
> On Sat, Nov 23, 2013 at 11:04 AM, Murphy McCauley <
> murphy.mccau...@gmail.com> wrote:
>
>>
>> On Nov 22, 2013, at 12:57 PM, Sayed Qaiser Ali Shah <
>> 11msitqs...@seecs.edu.pk> wrote:
>>
>> Hello Murphy McCauley,
>>
>> I solved the duplication problem now I want to refresh the dictionary I
>> have defined after an idle_timeout. I want to set idle_timeout to 10. I
>> tried this but didn't get what I wanted.
>>
>> msg.idle_timeout = 10
>> if msg.idle_timeout== True:
>> self.macaddrtable=' '
>>
>> This will destroy all entries in dictionary. Is there any other way so
>> that only that entry whose idle_timeout has expired is removed and then
>> rearrange remaining entries in dictionary.
>> Just as a reminder. macaddrtable is dictionary defined which contains
>> source and destination mac addresses. When a packet arrives controller its
>> entry is saved in the dictionary macaddrtable.
>>
>>
>> If you set the OFPFF_SEND_FLOW_REM flag when installing the table entry,
>> you'll get a FlowRemoved event when it expires. Maybe that's what you need?
>>
>> -- Murphy
>>
>> On Fri, Nov 15, 2013 at 6:05 PM, Sayed Qaiser Ali Shah <
>> 11msitqs...@seecs.edu.pk> wrote:
>>
>>> Ok thank you I will check it out.
>>>
>>>
>>> On Fri, Nov 15, 2013 at 5:54 PM, Murphy McCauley <
>>> murphy.mccau...@gmail.com> wrote:
>>>
>>>> I'm just suggesting you work backwards to find the problem. Use
>>>> Wireshark to monitor the traffic to help determine where the duplicates are
>>>> coming from. If they're coming from a switch, I suggest you inspect the
>>>> table on that switch to see which table entry the switch. Then analyze the
>>>> OpenFlow traffic to that switch to find the OpenFlow messages which
>>>> installed the problematic entries. Then analyze your controller code to
>>>> see where you sent those problematic entries.
>>>> -- Murphy
>>>>
>>>>
>>>> On Nov 15, 2013, at 4:49 AM, Sayed Qaiser Ali Shah <
>>>> 11msitqs...@seecs.edu.pk> wrote:
>>>>
>>>> Thank you so much. Yes you are right about what you said but is there
>>>> is any other way, so that I can do this. I can read individual entries
>>>> statically but the problem is I want to get it dynamic.
>>>> Like I can print individual entries by using:
>>>>
>>>> print self.macaddrtable[1]
>>>> print self.macaddrtable[2]
>>>> print self.macaddrtable[3]
>>>> print self.macaddrtable[4]
>>>>
>>>> To get desired result dynamically I used loop. But you know what I got.
>>>> :(
>>>>
>>>>
>>>> On Fri, Nov 15, 2013 at 3:36 PM, Murphy McCauley <
>>>> murphy.mccau...@gmail.com> wrote:
>>>>
>>>>>
>>>>> On Nov 15, 2013, at 2:20 AM, Sayed Qaiser Ali Shah <
>>>>> 11msitqs...@seecs.edu.pk> wrote:
>>>>>
>>>>> Hello Murphy actually I am working on Traffic Engineering. I am now
>>>>> learning that how to forward traffic when we have dictionary on
>>>>> controller.
>>>>> I want to forward some entries of dictionary via queue-1 and some entries
>>>>> via queue-2. For this I have created dictionary and it created
>>>>> successfully
>>>>> with you help. Those entries of dictionary contain Source Mac Address and
>>>>> Destination Mac address. I created 2 queues on Interface 1 of switch. I
>>>>> then Pinged host 2 from host 1 and host 1 from host 3. It inserted four
>>>>> entries in dictionary created on controller. Entries in Dictionary are
>>>>> {1: (EthAddr('00:00:00:00:00:02'), EthAddr('00:00:00:00:00:01')),
>>>>> 2: (EthAddr('00:00:00:00:00:01'), EthAddr('00:00:00:00:00:02')),
>>>>> 3: (EthAddr('00:00:00:00:00:01'), EthAddr('00:00:00:00:00:03')),
>>>>> 4: (EthAddr('00:00:00:00:00:03'), EthAddr('00:00:00:00:00:01')) }
>>>>> Dear Murphy you asked earlier that you didn't get what I wanted to do.
>>>>> I think that I am just explaining it in easy way that I just want to
>>>>> forward two entries of dictionary via queue-1 and other 2 entries of
>>>>> dictionary via queue-2. I am just doing practice on different techniques
>>>>> of
>>>>> Traffic Engineering. I used the following code for forwarding traffic via
>>>>> queues:
>>>>>
>>>>> if self.macaddrtable=='': //When we have no entry in macaddrtable
>>>>> dictionary
>>>>> queue=1
>>>>> msg.actions.append(of.ofp_action_enqueue(port = port, queue_id
>>>>> = queue))
>>>>> else:
>>>>> for a in self.macaddrtable:
>>>>> if a<=2:
>>>>> queue=1
>>>>> msg.actions.append(of.ofp_action_enqueue(port = port,
>>>>> queue_id = queue))
>>>>> elif a>2:
>>>>> queue=2
>>>>> msg.actions.append(of.ofp_action_enqueue(port = port,
>>>>> queue_id = queue))
>>>>>
>>>>> The code worked fine and forwarded traffic via desired queues but
>>>>> after about 10 seconds of pinging, duplicate packets were detected. I
>>>>> don't
>>>>> know why duplicate packets were detected. Can you please tell the reason?
>>>>>
>>>>>
>>>>> My best guesses are that you are somehow creating a flow entry with
>>>>> multiple actions or a loop, but it's hard to say. I'd suggest that you
>>>>> try
>>>>> to use Wireshark or a similar tool to figure out where the duplicates are
>>>>> coming from. You should see the duplicates at the port of the destination
>>>>> host and the egress port of the last switch. Work backwards from there.
>>>>> If you find the source of the duplications is a switch, examine the flow
>>>>> table of that switch and see if you can spot the reason.
>>>>>
>>>>> -- Murphy
>>>>>
>>>>> On Tue, Nov 12, 2013 at 2:00 AM, Murphy McCauley <
>>>>> murphy.mccau...@gmail.com> wrote:
>>>>>
>>>>>> It's still hard for me to answer questions since I still don't know
>>>>>> what you're really trying to accomplish here.
>>>>>>
>>>>>> If you want entries to time out on the switch, set timeouts when
>>>>>> installing the table entry (sending the flow_mod). If you want
>>>>>> notifications when flows are removed on the switch, that's also an option
>>>>>> you can set when installing the entry; then listen to the FlowRemoved
>>>>>> event
>>>>>> to tell when it has actually happened.
>>>>>>
>>>>>> I'm not sure what you mean by "exact mac". Your code records the
>>>>>> address the packets were sent to. If they were sent to the broadcast
>>>>>> address, then... that's the destination.
>>>>>>
>>>>>> -- Murphy
>>>>>>
>>>>>> On Nov 11, 2013, at 9:42 AM, Sayed Qaiser Ali Shah <
>>>>>> 11msitqs...@seecs.edu.pk> wrote:
>>>>>>
>>>>>> Thank you so much Murphy for your help. I did it the way you
>>>>>> explained. But how can I refresh entries in the table. i.e. how to set
>>>>>> idle
>>>>>> timeout and hard timeout for this so that the table can be refreshed or
>>>>>> how
>>>>>> the entries can be updated when a flow is removed from flow table on
>>>>>> Switch.
>>>>>> Another Problem is:
>>>>>> The code is as below.
>>>>>>
>>>>>> if (packet.src,packet.dst) not in self.macaddrs and
>>>>>> (packet.dst,packet.src) not in self.macaddrs:
>>>>>> self.macaddrs.add((packet.src,packet.dst))
>>>>>> self.macaddrtable[f_id]=(packet.src,packet.dst)
>>>>>> f_id=f_id+1
>>>>>> print "Mac Table is "
>>>>>> print self.macaddrtable
>>>>>>
>>>>>> When I created a topology with 3 hosts the following result was shown
>>>>>>
>>>>>> Mac Table is
>>>>>> {1: (EthAddr('00:00:00:00:00:01'), EthAddr('ff:ff:ff:ff:ff:ff')), 2:
>>>>>> (EthAddr('00:00:00:00:00:02'), EthAddr('00:00:00:00:00:01')), 3:
>>>>>> (EthAddr('00:00:00:00:00:03'), EthAddr('00:00:00:00:00:01')), 4:
>>>>>> (EthAddr('00:00:00:00:00:02'), EthAddr('ff:ff:ff:ff:ff:ff')), 5:
>>>>>> (EthAddr('00:00:00:00:00:03'), EthAddr('00:00:00:00:00:02'))}
>>>>>>
>>>>>> The result I expected is little bit different in terms of broadcast
>>>>>> address. Like in 1 destination mac is ff:ff:ff:ff:ff:ff but I was
>>>>>> expecting
>>>>>> 00:00:00:00:00:02 and similar is the case with some other entries as
>>>>>> well.
>>>>>> Is there any way so that I can get desired exact mac, not broadcast?
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sun, Nov 10, 2013 at 5:00 AM, Murphy McCauley <
>>>>>> murphy.mccau...@gmail.com> wrote:
>>>>>>
>>>>>>> It sounds like you need to record them as a pair to get what you
>>>>>>> want, so ... put them in as a pair.
>>>>>>>
>>>>>>> It looks like I may have been responsible for the problem you were
>>>>>>> seeing -- a little typo inserted an errant right square bracket. Try:
>>>>>>> self.macaddrs.add((packet.src,packet.dst))
>>>>>>>
>>>>>>> It's still not clear from context whether ordering matters to you
>>>>>>> (is A sending to B the same as B sending to A?). If it isn't, you might
>>>>>>> want to sort the two addresses or just check for both...
>>>>>>>
>>>>>>> if (packet.src,packet.dst) not in self.macaddrs and
>>>>>>> (packet.dst,packet.src) not in self.macaddrs:
>>>>>>>
>>>>>>> -- Murphy
>>>>>>>
>>>>>>> On Nov 9, 2013, at 3:32 PM, Sayed Qaiser Ali Shah <
>>>>>>> 11msitqs...@seecs.edu.pk> wrote:
>>>>>>>
>>>>>>> Thank you so much Murphy. I tried it but got little problem in add
>>>>>>> function i.e. when I used
>>>>>>> self.macaddrs.add((packet.src,packet.dst])) it generated error in
>>>>>>> this function then I tried
>>>>>>> self.macaddrs.add(packet.src,packet.dst)
>>>>>>> It also generated an error that add must have 1 argument where as 2
>>>>>>> given. Then I tried
>>>>>>>
>>>>>>> if (packet.src,packet.dst) not in self.macaddrs:
>>>>>>> self.macaddrs.add(packet.src)
>>>>>>> self.macaddrs.add(packet.dst)
>>>>>>> self.macaddrtable[f_id]=(packet.src,packet.dst)
>>>>>>> f_id=f_id+1
>>>>>>>
>>>>>>> It didn't generate an error and I didn't get any repeated result but
>>>>>>> there was some problem in the code I got results as below.
>>>>>>> When I ping host1 from host 2 it added record in dictionary. Then I
>>>>>>> ping host 3 from h1 record was inserted again but the problem was, as
>>>>>>> record of host 1, host 2 and host 3 was saved in macaddrs and two
>>>>>>> records
>>>>>>> were there but when I pinged the hosts present in macaddrs i.e. 1, 2, 3
>>>>>>> like I ping host 2 from h3 as record was not present in macaddrtable
>>>>>>> still
>>>>>>> record was not added to dictionary. It is because addresses are saving
>>>>>>> in
>>>>>>> macaddrs one by one individually i.e. first source and then destination
>>>>>>> address. When packet arrives controller it checks for source and
>>>>>>> destination address in macaddrs as when there are individual record of
>>>>>>> each
>>>>>>> host it then doesn't execute IF body because source and destination
>>>>>>> addresses are already there as individual address. What to do with
>>>>>>> this????
>>>>>>> Kindly help.
>>>>>>>
>>>>>>>
>>>>>>> On Sun, Nov 10, 2013 at 3:26 AM, Murphy McCauley <
>>>>>>> murphy.mccau...@gmail.com> wrote:
>>>>>>>
>>>>>>>> One possible answer is that you should keep a set of the ones
>>>>>>>> you've added so far...
>>>>>>>> self.macaddrtable = {}
>>>>>>>> self.macaddrs = set()
>>>>>>>>
>>>>>>>> ...
>>>>>>>>
>>>>>>>> if (packet.src,packet.dst) not in self.macaddrs:
>>>>>>>> self.macaddrs.add((packet.src,packet.dst]))
>>>>>>>> self.macaddrtable[f_id]=(packet.src,packet.dst)
>>>>>>>> f_id=f_id+1
>>>>>>>>
>>>>>>>>
>>>>>>>> There might be better things to be done, but it's impossible to say
>>>>>>>> without knowing more (e.g., what you're trying to accomplish, what
>>>>>>>> f_id is
>>>>>>>> used for, etc.).
>>>>>>>>
>>>>>>>> -- Murphy
>>>>>>>>
>>>>>>>> On Nov 9, 2013, at 10:35 AM, Sayed Qaiser Ali Shah <
>>>>>>>> 11msitqs...@seecs.edu.pk> wrote:
>>>>>>>>
>>>>>>>> > Hello everybody,
>>>>>>>> >
>>>>>>>> > I have defined dictionary in POX controller and I by the name
>>>>>>>> addrtable and I am saving two things in this dictionary i.e. Source
>>>>>>>> mac and
>>>>>>>> destination mac. What I have done is
>>>>>>>> >
>>>>>>>> > self.macaddrtable = {}
>>>>>>>> > ...
>>>>>>>> > f_id=1
>>>>>>>> > self.macaddrtable[f_id]={packet.src, packet.dst}
>>>>>>>> > print self.macaddrtable
>>>>>>>> > f_id=f_id+1
>>>>>>>> >
>>>>>>>> > It is saving source mac and destination mac in the dictionary but
>>>>>>>> the problem is when f_id increases it then save same source and
>>>>>>>> destination
>>>>>>>> mac again and again.
>>>>>>>> > What I want is to save mac address only if its not in dictionary.
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>>
>>>>
>>>>
>>>>
>>>> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>>>
>>
>>
>>
>> --
>>
>>
>>
>>
>> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>>
>>
>>
>
>
> --
>
>
>
>
> *Regards Sayed Qaiser Ali ShahMSIT-12 NUST (SEECS)*
>
--
*RegardsSayed Qaiser Ali ShahMSIT-12NUST (SEECS)*
