[pox-dev] no route to host - loop topology

[Silvia Fichera]

I've tried with l2_learning and the result it's the same:

ERROR:openflow.of_01:[00-00-00-00-00-02 3] OpenFlow Error:
[00-00-00-00-00-02 3] Error: header:
[00-00-00-00-00-02 3] Error:   version: 1
[00-00-00-00-00-02 3] Error:   type:    1 (OFPT_ERROR)
[00-00-00-00-00-02 3] Error:   length:  76
[00-00-00-00-00-02 3] Error:   xid:     8997
[00-00-00-00-00-02 3] Error: type: OFPET_BAD_REQUEST (1)
[00-00-00-00-00-02 3] Error: code: OFPBRC_BUFFER_UNKNOWN (8)
[00-00-00-00-00-02 3] Error: datalen: 64
[00-00-00-00-00-02 3] Error: 0000: 01 0e 00 50 00 00 23 25  00 00 00 00 00
11 26 02   |...P..#%......&.|
[00-00-00-00-00-02 3] Error: 0010: f7 19 00 cf 26 c6 2c c9  90 93 ff ff 00
00 08 00   |....&.,.........|
[00-00-00-00-00-02 3] Error: 0020: 00 06 00 00 0a 54 37 f2  0a 00 00 65 b3
51 13 89   |.....T7....e.Q..|
[00-00-00-00-00-02 3] Error: 0030: 00 00 00 00 00 00 00 00  00 00 00 0a 00
1e 80 00   |................|


What do you exactly mean with manually down?

I've tried with no loop topology and it works fine except when, while
mininet starts switches, it says this (None 2, in this case):

NFO:core:POX 0.2.0 (carp) is up.
INFO:openflow.of_01:[8e-a0-3f-85-d5-41 1] connected
INFO:packet:(dhcp parse) warning DHCP packet data too short to parse
header: data len 86
INFO:openflow.of_01:[None 2] disconnected
INFO:openflow.of_01:[None 2] closed
INFO:openflow.of_01:[00-00-00-00-00-01 3] connected
INFO:openflow.of_01:[00-00-00-00-00-02 4] connected
INFO:openflow.of_01:[00-00-00-00-00-03 5] connected
INFO:openflow.of_01:[00-00-00-00-00-04 6] connected
INFO:openflow.of_01:[00-00-00-00-00-05 7] connected
INFO:openflow.of_01:[00-00-00-00-00-06 8] connected
INFO:openflow.discovery:link detected: 8e-a0-3f-85-d5-41.1 ->
00-00-00-00-00-04.1
INFO:openflow.of_01:[00-00-00-00-00-07 9] connected
INFO:openflow.of_01:[00-00-00-00-00-08 10] connected
INFO:openflow.of_01:[00-00-00-00-00-09 11] connected


Thanks!




2013/12/24 Murphy McCauley <murphy.mccauley at gmail.com>

> Hmm...  I wonder if you're getting a loop anyway.
>
> As a first test, what happens if you try using l2_learning instead of
> l3_learning?
>
> What if you manually down links to remove loops?
>
> -- Murphy
>
> On Dec 24, 2013, at 10:42 AM, Silvia Fichera <fichera.sil at gmail.com>
> wrote:
>
> > Hi all,
> > I have a topology with loops, and my version of Pox is up-to-date.
> > I run pox in this way:
> >
> > ./pox.py forwarding.l3_learning openflow.discovery --eat-early-packets
> openflow.spanning_tree --no-flood --hold-down
> >
> > after running pox I start mininet and I try to build a tcp connection
> with iperf from 2 hosts to the same host.
> > But I can't reach it (no route to host) and I have this error:
> >
> > ERROR:openflow.of_01:[00-00-00-00-00-02 5] OpenFlow Error:
> > [00-00-00-00-00-02 5] Error: header:
> > [00-00-00-00-00-02 5] Error:   version: 1
> > [00-00-00-00-00-02 5] Error:   type:    1 (OFPT_ERROR)
> > [00-00-00-00-00-02 5] Error:   length:  76
> > [00-00-00-00-00-02 5] Error:   xid:     2046
> > [00-00-00-00-00-02 5] Error: type: OFPET_BAD_REQUEST (1)
> > [00-00-00-00-00-02 5] Error: code: OFPBRC_BUFFER_UNKNOWN (8)
> > [00-00-00-00-00-02 5] Error: datalen: 64
> > [00-00-00-00-00-02 5] Error: 0000: 01 0e 00 48 00 00 07 fe  00 00 20 40
> 00 18 d2 87   |...H...... @....|
> > [00-00-00-00-00-02 5] Error: 0010: 03 64 03 d1 00 00 00 00  00 06 ff ff
> 00 00 08 00   |.d..............|
> > [00-00-00-00-00-02 5] Error: 0020: 00 06 00 00 00 00 00 00  0a 00 00 65
> 00 00 13 89   |...........e....|
> > [00-00-00-00-00-02 5] Error: 0030: 00 00 00 00 00 00 00 00  00 00 00 00
> 00 00 80 00   |................|
> >
> > Sometimes it happens just for one of the sender, sometimes for both of
> them.
> > Do you know how can I solve it?
> >
> > Thank you and Happy Xmas
> >
> > --
> > Silvia Fichera
>
>


-- 
Silvia Fichera
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.noxrepo.org/pipermail/pox-dev-noxrepo.org/attachments/20131225/27dba27e/attachment-0001.htm>