Thanks a lot Murphy; really appreciate!!!
Cheers,,,
Talal
> On Jan 12, 2015, at 7:19 PM, Murphy McCauley <murphy.mccau...@gmail.com>
> wrote:
>
> See inline.
>
>> On Jan 12, 2015, at 1:04 AM, TALAL AL-HARBI <tal...@hotmail.com> wrote:
>>
>> I added a print statement to spanning tree code:
>>
>> # Now modify ports as needed
>> try:
>> change_count = 0
>> for sw, ports in tree.iteritems():
>> con = core.openflow.getConnection(sw)
>> if con is None: continue # Must have disconnected
>> if con.connect_time is None: continue # Not fully connected
>>
>> if _hold_down:
>> if con.connect_time > enable_time:
>> # Too young -- we should hold down changes.
>> if force_dpid is not None and sw == force_dpid:
>> # .. but we'll allow it anyway
>> pass
>> else:
>> continue
>>
>> tree_ports = [p[1] for p in ports]
>> for p in con.ports.itervalues():
>> print "Ports", p
>> <----------------------- Here
>> if p.port_no < of.OFPP_MAX:
>> flood = p.port_no in tree_ports
>> print "Flood", flood
>
> You're printing out the value here and seeing that it's False...
>
>> if not flood:
>> if core.openflow_discovery.is_edge_port(sw, p.port_no):
>> flood = True
>
> .. but it's being changed to True right here if the port doesn't connect two
> switches, which is exactly the case you're talking about.
>
>> if _prev[sw][p.port_no] is flood:
>> #print sw,p.port_no,"skip","(",flood,")"
>> continue # Skip
>> change_count += 1
>> _prev[sw][p.port_no] = flood
>> #print sw,p.port_no,flood
>> #TODO: Check results
>>
>> Subject: Re: [pox-dev] Spanning Tree Algorithm
>> From: murphy.mccau...@gmail.com
>> Date: Mon, 12 Jan 2015 00:55:34 -0800
>> CC: pox-dev@lists.noxrepo.org
>> To: tal...@hotmail.com
>>
>> I don't have enough information to understand or evaluate the information
>> you've given about port status. Where does it come from? Are you querying
>> the switch, or is it from one of the datastructures in spanning_tree.py, or
>> something else? When are you printing it?
>>
>> And what options are you using to run discovery and spanning_tree?
>>
>> -- Murphy
>>
>> On Jan 12, 2015, at 12:47 AM, TALAL AL-HARBI <tal...@hotmail.com> wrote:
>>
>> Dear Murphy
>>
>> After the connection is established, ports status set to false expect those
>> who are between switches and no correcting a loop even ports where hosts
>> attached to.
>>
>> I have printed ports status with basic topology:
>>
>> Ports s1-eth1:1 ------> where host1 attached to
>> Flood False
>> Ports s1-eth2:2 -------> Link between S1 & S2
>> Flood True
>> Ports s1:65534
>> Ports s2-eth1:1 ------> where host2 attached to
>> Flood False
>> Ports s2-eth2:2
>> Flood True
>> Ports s2:65534
>>
>> In this case, why once s1 gets arp request, broadcast it out of port1?
>>
>> Best,,,
>> Talal
>> Subject: Re: [pox-dev] Spanning Tree Algorithm
>> From: murphy.mccau...@gmail.com
>> Date: Fri, 9 Jan 2015 19:28:22 -0800
>> CC: amer7...@hotmail.com; pox-dev@lists.noxrepo.org
>> To: tal...@hotmail.com
>>
>> I believe you're mistaken and the ports to which hosts are attached have
>> flood enabled. What makes you think this isn't the case?
>>
>> -- Murphy
>>
>> On Jan 9, 2015, at 7:21 PM, TALAL AL-HARBI <tal...@hotmail.com> wrote:
>>
>> If you print out ports status, you would see they are false.
>>
>> Sent from my iPhone
>>
>> On Jan 9, 2015, at 9:46 PM, Amer <amer7...@hotmail.com> wrote:
>>
>> Dear Talal
>>
>> The ports that are connected to hosts are not creating loops, thus it will
>> not be disabled.
>>
>> Best regards,
>> Amer
>>
>> Sent from my iPhone
>>
>> On ٠٩/٠١/٢٠١٥, at ١٠:٠٥ ص, TALAL AL-HARBI <tal...@hotmail.com> wrote:
>>
>> Hello There,,,
>>
>> I'm a bit confused about spanning tree algorithm. After detecting all links,
>> it disables the one creating the loop. However, ports where hosts attached
>> to are still False(Means no flood?). Pings were successful, how ?
>> Thank you!!!
>>
>> Cheers,,,
>> Talal
>
