Dear All
It is done after I used the following statement when I run mininet
--switch ovsk, datapath='user'
the mininet fire command will be is
sudo mn --custom ~/xxxxx.py --topo mytopos --switch ovsk, datapath='user'
--controller=remote .......
Best regards,
Eng Amer Alghadhban
COE
SANS-GCFW
CEH, SCNP, CCNA
From: amer7...@hotmail.com
To: murphy.mccau...@gmail.com
Date: Mon, 9 Nov 2015 14:05:58 +0000
CC: pox-dev@lists.noxrepo.org
Subject: Re: [pox-dev] MPLS match and labels popping
Dear Murphy
Thank you for your advises
Which version of OvS you suggest to use for MPLS.
Best regards,
Eng Amer Alghadhban
COE
SANS-GCFW
CEH, SCNP, CCNA
Subject: Re: MPLS match and labels popping
From: murphy.mccau...@gmail.com
Date: Sun, 8 Nov 2015 13:07:59 -0800
CC: pox-dev@lists.noxrepo.org
To: amer7...@hotmail.com
On Nov 8, 2015, at 8:04 AM, AMER <amer7...@hotmail.com> wrote:
Dear All
I would like to ask you about the following match commands and actions
msg1 = nx.nx_flow_mod()
msg1.match = nx.nx_match()
msg1.match.eth_type = pkt.ethernet.MPLS_TYPE
msg1.match.mpls_label = 50# host 1 10.0.0.1
msg1.actions.append(of.ofp_action_output(port = 1))
The above matches didn't work
I'd suggest trying to narrow down why it doesn't work. If you remove the label
match, do all MPLS packets go out port 1? Have you used Wireshark or something
to confirm that there are packets that you think should match with label 50?
It's also possible that some MPLS stuff just plain doesn't work with
current/almost-current OVS, I suppose. It was added to POX when MPLS support
was pretty experimental...
when I tested it in mininet 2.2.1, OvS 2.3.2 , POX is "POX 0.2.0 (carp)"
Carp is pretty old. I have no memory of whether there are known problems with
it.
The push command is:
msg = nx.nx_flow_mod()
msg.match.of_eth_src = "00:00:00:00:00:04"
msg.actions.append(nx.nx_action_push_mpls())
msg.actions.append(nx.nx_reg_load(dst=nx.OXM_OF_MPLS_LABEL, value=50))
msg.actions.append(of.ofp_action_output(port = 2))
core.openflow.sendToDPID(event.dpid, msg)
Also, when I tried to use pop command as the following I received the down error
msg1 = nx.nx_flow_mod()
msg1.match = nx.nx_match()
msg1.match.eth_type = pkt.ethernet.MPLS_TYPE
msg1.match.mpls_label = 50# host 1 10.0.0.1
msg1.actions.append(nx.nx_action_pop_mpls()) ######<-- POP
msg1.actions.append(of.ofp_action_output(port = 1))
The error is:
POX 0.2.0 (carp) / Copyright 2011-2013 James McCauley, et al.
INFO:forwarding.l2_mid:Simple NX switch running.
INFO:core:POX 0.2.0 (carp) is up.
INFO:openflow.of_01:[00-00-00-00-00-02 1] connected
INFO:forwarding.l2_mid:2 switches in path
INFO:openflow.of_01:[00-00-00-00-00-01 2] connected
INFO:forwarding.l2_mid:1 switches in path
ERROR:core:Exception while handling OpenFlowNexus!ConnectionUp...
Traceback (most recent call last):
File "/home/alghada/pox/pox/lib/revent/revent.py", line 231, in
raiseEventNoErrors
return self.raiseEvent(event, *args, **kw)
File "/home/alghada/pox/pox/lib/revent/revent.py", line 278, in raiseEvent
rv = event._invoke(handler, *args, **kw)
File "/home/alghada/pox/pox/lib/revent/revent.py", line 156, in _invoke
return handler(self, *args, **kw)
File "/home/alghada/pox/pox/forwarding/l2_mid.py", line 110, in
_handle_ConnectionUp
core.openflow.sendToDPID(event.dpid, msg1)
File "/home/alghada/pox/pox/openflow/__init__.py", line 353, in sendToDPID
self._connections[dpid].send(data)
File "/home/alghada/pox/pox/openflow/of_01.py", line 692, in send
data = data.pack()
File "/home/alghada/pox/pox/openflow/nicira.py", line 387, in pack
packed += i.pack()
File "/home/alghada/pox/pox/openflow/libopenflow_01.py", line 2036, in pack
body = self._pack_body()
File "/home/alghada/pox/pox/openflow/nicira.py", line 815, in _pack_body
p = struct.pack('!HHI', self.subtype, self.ethertype, 0) # 4 bytes pad
error: cannot convert argument to integer
This one is very easy. pop requires the new Ethertype to be given.
nx_action_pop_mpls(ethertype=0x0800) or something like that will be more likely
to work (if the packet was IP).
Any help is appreciated
Best regards,
Eng Amer Alghadhban
COE
SANS-GCFW
CEH, SCNP, CCNA
