Hi Aaron,
Can you tell us if there is any difference in the tcpdump from the HP
and Indigo?
I skimmed through the NOX code and it seems to parse VLAN. So, there
is something amiss here.
Regards
KK
On 5 January 2011 14:50, Srini Seetharaman <seeth...@stanford.edu> wrote:
> I'm a bit confused by what you see with Indigo. Here's what I said:
> - HP switch: Packet_ins seen at the controller will not have the VLAN
> tag, but outgoing packets in the dataplane will have the appropriate
> tag.
> - Indigo switch: Packet_ins seen at the controller will have the VLAN
> tag if tagged packets are sent to it. For outgoing packets to have the
> tag, the controller has to add the tag (as an additional action).
>
> On Wed, Jan 5, 2011 at 2:37 PM, Aaron Rosen <aro...@clemson.edu> wrote:
>> Hi Srini,
>>
>> In my topology I have an HP switch which I have configured a port to tag
>> several vlans. If I plug my laptop into this port I'm able to see the
>> correct vlan values. Now If I plug a switch into this port that is running
>> the indigo firmware when the controller gets the packets I'm seeing 0xffff
>> as the value instead of the correct value I see with my laptop using
>> wireshark.
>>
>> (According to your response this should be fine? )
>>
>> Aaron
>>
>> On Wed, Jan 5, 2011 at 5:31 PM, Srini Seetharaman <seeth...@stanford.edu>
>> wrote:
>>>
>>> Hi Aaron
>>> Only pure-OF switches (like Pronto switch with Indigo firmware) will
>>> send the VLAN tag to the controller. With others, the tag is usually
>>> added / stripped by the VLAN configs on the switch. So, you'll not get
>>> to see them.
>>>
>>> Srini.
>>>
>>> On Wed, Jan 5, 2011 at 2:23 PM, Aaron Rosen <aro...@clemson.edu> wrote:
>>> > Hello,
>>> >
>>> > I'm trying to extract the dl_vlan value from packets on a trunk port.
>>> > When I
>>> > plug my computer into the trunk port and run tcpdump I see the correct
>>> > 802.1Q values. Though when I attach this port to my openflow switch
>>> > (running
>>> > the pronto firmware) I can't get the correct values at my controller.
>>> >
>>> > In my controller I'm running these few lines of code to print out what's
>>> > in
>>> > the packet.
>>> >
>>> > test = extract_flow(packet)
>>> > print test.keys()
>>> > print test.values()
>>> >
>>> > From this: I'm getting the following output
>>> >
>>> > ['dl_type', 'nw_dst', 'dl_vlan_pcp', 'dl_src', 'nw_proto', 'nw_tos',
>>> > 'tp_dst', 'tp_src', 'dl_dst', 'dl_vlan', 'nw_src']
>>> > [2048, 4294967295, 0, array('B', [0, 27, 177, 2, 100, 167]), 17, 0, 698,
>>> > 698, array('B', [255, 255, 255, 255, 255, 255]), 65535, 2189371010]
>>> >
>>> > I'm getting 65535 for every packet and that is not correct from what I'm
>>> > seeing with tcpdump and not what I'm expecting.
>>> >
>>> > Can someone point out where I'm going wrong.
>>> >
>>> > Thanks,
>>> >
>>> > Aaron
>>> >
>>> > --
>>> > Aaron O. Rosen
>>> > Masters Student - Network Communication
>>> > 306B Fluor Daniel
>>> > 843.425.9777
>>> >
>>> >
>>> > _______________________________________________
>>> > nox-dev mailing list
>>> > nox-dev@noxrepo.org
>>> > http://noxrepo.org/mailman/listinfo/nox-dev_noxrepo.org
>>> >
>>> >
>>
>>
>>
>> --
>> Aaron O. Rosen
>> Masters Student - Network Communication
>> 306B Fluor Daniel
>> 843.425.9777
>>
>>
>
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