Thank you. You shared links relevant to OpenFlow version 1.3. I actually was able to add group entries via with OpenFlow version 1.3. I have issue in version 1.5. If you could provide something related to that, it will be helpful.
On Fri, Jan 4, 2019 at 4:36 PM knet solutions <knetsolutio...@gmail.com> wrote: > Hi Ramzah Rehman, > > Refer this below tutorial for Group Table in RYU, also sample exercise > also present in this git repository. > > > https://github.com/knetsolutions/learn-sdn-with-ryu/blob/master/ryu_part8.md > > > https://github.com/knetsolutions/learn-sdn-with-ryu > > Thanks > Suresh. > > > On Fri, Jan 4, 2019 at 5:03 PM Ramzah Rehman <ramzahreh...@gmail.com> > wrote: > >> Hi, >> I tried to add a Group Entry in my OVS version 2.8.6 switch via RYU >> controller using ofproto_v1_5 (switch has been configured to support >> OpenFlow 1.5 ). I found send_group_mod >> <https://ryu.readthedocs.io/en/latest/ofproto_v1_5_ref.html> function >> here. I used the exact code to check if it's working but got this >> OFPGMFC_BAD_BUCKET(12) error. >> >> The code for adding a group entry is as follows: >> >> def send_group_mod(self, datapath): >> ofp = datapath.ofproto >> ofp_parser = datapath.ofproto_parser >> >> port = 1 >> max_len = 2000 >> actions = [ofp_parser.OFPActionOutput(port, max_len)] >> >> weight = 100 >> watch_port = 0 >> watch_group = 0 >> buckets = [ofp_parser.OFPBucket(weight, watch_port, watch_group, >> actions)] >> >> group_id = 1 >> command_bucket_id=1 >> req = ofp_parser.OFPGroupMod(datapath, ofp.OFPGC_ADD, >> ofp.OFPGT_SELECT, group_id, >> command_bucket_id, buckets) >> datapath.send_msg(req) >> >> The error I got is: >> >> OFPErrorMsg(type=0x6, code=0xc, >> data=b'\x06\x0f\x00\x20\x4c\x6d\x56\x22\x00\x00\x01\x00\x00\x00\x00\x01\x00\x08\x00\x00\x00\x00\x00\x01\x00\x08\x00\x00\x00\x00\x00\x64') >> |-- type: OFPET_GROUP_MOD_FAILED(6) >> |-- code: *OFPGMFC_BAD_BUCKET(12)* >> `-- data: version=0x6, msg_type=0xf, msg_len=0x20, xid=0x4c6d5622 >> `-- msg_type: OFPT_GROUP_MOD(15) >> >> >> Error BAD_BUCKET(12) is thrown when there is a error in bucket. Since I was >> using SELECT type of group I did not require watch_port and watch_group. So >> I set these variables to these: >> >> watch_port = ofproto_v1_5.OFPP_ANY >> watch_group = ofproto_v1_5.OFPQ_ALL >> >> I restarted my controller, this time I got this error: >> >> >> SimpleSwitch15: Exception occurred during handler processing. Backtrace from >> offending handler [switch_features_handler] servicing event >> [EventOFPSwitchFeatures] follows. >> Traceback (most recent call last): >> File >> "/home/aa/PycharmProjects/ovs-controller/venv/lib/python3.4/site-packages/ryu/base/app_manager.py", >> line 290, in _event_loop >> handler(ev) >> File "/home/aa/PycharmProjects/ovs-controller/mycontroller.py", line 55, >> in switch_features_handler >> self.send_group_mod(datapath) >> File "/home/aa/PycharmProjects/ovs-controller/mycontroller.py", line 348, >> in send_group_mod >> datapath.send_msg(req) >> File >> "/home/aa/PycharmProjects/ovs-controller/venv/lib/python3.4/site-packages/ryu/controller/controller.py", >> line 423, in send_msg >> msg.serialize() >> File >> "/home/aa/PycharmProjects/ovs-controller/venv/lib/python3.4/site-packages/ryu/ofproto/ofproto_parser.py", >> line 270, in serialize >> self._serialize_body() >> File >> "/home/aa/PycharmProjects/ovs-controller/venv/lib/python3.4/site-packages/ryu/ofproto/ofproto_v1_5_parser.py", >> line 6281, in _serialize_body >> b.serialize(self.buf, offset) >> File >> "/home/aa/PycharmProjects/ovs-controller/venv/lib/python3.4/site-packages/ryu/ofproto/ofproto_v1_5_parser.py", >> line 6509, in serialize >> * for a in self.actions:* >> *TypeError: 'int' object is not iterable* >> >> I debugged my code to check if actions are being set properly in buckets. To >> my chagrin, actions were not being set at all in the OFPBucket. I got an >> interger instead of a list of actions in OFPBucket. I have attached the >> screenshot of debugging. >> >> Then I checked the implementation of OFPBucket in ofproto_v1_5_parser.py >> file here >> <https://github.com/osrg/ryu/blob/master/ryu/ofproto/ofproto_v1_5_parser.py> >> and to my surprise, OFPBucket constructor had a very different signature >> i.e.: >> >> def __init__(self, bucket_id=0, actions=None, properties=None, len_=None, >> action_array_len=None) >> The way I was calling OFPBucket constructor was valid for version 1.3 not >> version 1.5. (I check the send_group_mod for version 1.3 >> <https://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html> here and it was >> working properly). >> Anyhow, since I had been initializing my OFPButcket wrongly, I modified my >> code as follows. This time, the actions list was being set properly in the >> bucket but still, I got bad_BUCKET(12) error. Please help. >> *Modified Code:* >> >> def send_group_mod(self, datapath): >> ofp = datapath.ofproto >> ofp_parser = datapath.ofproto_parser >> >> port = 1 >> max_len = 2000 >> actions = [ofp_parser.OFPActionOutput(port, max_len)] >> >> weight = 100 >> #watch_port = ofproto_v1_5.OFPP_ANY >> #watch_group = ofproto_v1_5.OFPQ_ALL >> >> bucket = datapath.ofproto_parser.OFPBucket(bucket_id=1, >> actions=actions, properties=None, len_=32,action_array_len=None) >> buckets = [bucket] >> #buckets = [ofp_parser.OFPBucket(weight, watch_port, >> watch_group,actions)] >> >> group_id = 1 >> command_bucket_id = 1 >> req = ofp_parser.OFPGroupMod(datapath, ofp.OFPGC_ADD, >> ofp.OFPGT_SELECT, group_id, >> command_bucket_id, buckets) >> datapath.send_msg(req) >> >> *Error:* >> >> EventOFPErrorMsg received. >> version=0x6, msg_type=0x1, msg_len=0x3c, xid=0x1d46ee73 >> `-- msg_type: OFPT_ERROR(1) >> OFPErrorMsg(type=0x6, code=0xc, >> data=b'\x06\x0f\x00\x30\x1d\x46\xee\x73\x00\x00\x01\x00\x00\x00\x00\x01\x00\x18\x00\x00\x00\x00\x00\x01\x00\x18\x00\x10\x00\x00\x00\x01\x00\x00\x00\x10\x00\x00\x00\x01\x07\xd0\x00\x00\x00\x00\x00\x00') >> |-- type: OFPET_GROUP_MOD_FAILED(6) >> |-- code: OFPGMFC_BAD_BUCKET(12) >> `-- data: version=0x6, msg_type=0xf, msg_len=0x30, xid=0x1d46ee73 >> `-- msg_type: OFPT_GROUP_MOD(15) >> >> _______________________________________________ >> Ryu-devel mailing list >> Ryu-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/ryu-devel >> > > > -- > > *Regards, * > *Knet solutions.* > Whatsapp/Mobile: +919445042007 > website: http://knetsolutions.in/ > Facebook Page : https://www.facebook.com/sdntraining/ > youtube channel: https://www.youtube.com/channel/UCTD6X9_oDqIYs_xpE7moFnQ > > >
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