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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