weixin_39548972
2020-12-30 13:19 阅读 5

Pox generates warning messages

I run my custom mininet topology on a terminal, and in the other, I tried to run pox on the other terminal, although I get these warning messages, is there any way to get rid of them or to suppress them? 1. in mininet console: sudo mn --custom /home/anusha/mininet/custom/mytopo.py --controller=remote,ip=127.0.0.1 --topo mytopo 2. in pox console: ./pox.py log.level --DEBUG misc.of_tutorial (it starts off without error but then i get the below mentioned errors and warnings)


ERROR:packet:(dns) parsing answers: Bad address format ����|��cV
ERROR:packet:(dns) parsing answers: Bad address format ���y����
INFO:packet:(dhcp parse) warning DHCP packet data too short to parse header: data len 86
INFO:packet:(dhcp parse) warning DHCP packet data too short to parse header: data len 86
INFO:packet:(ipv6) warning IP packet data incomplete (114 of 229)
INFO:packet:(dns) parsing answers: next_rr: data truncated
INFO:packet:(dhcp parse) warning DHCP packet data too short to parse header: data len 86
INFO:packet:(dhcp parse) warning DHCP packet data too short to parse header: data len 86
INFO:packet:(ipv6) warning IP packet data incomplete (114 of 229)

该提问来源于开源项目:noxrepo/pox

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13条回答 默认 最新

  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    There's an entry that addresses this in the manual's FAQ: https://openflow.stanford.edu/display/ONL/POX+Wiki#POXWiki-Whataretheselogmessagesfromthepacketsubsystem%3F

    Solution 2 might work for you except that you might want to change it to CRITICAL instead of WARN since you have a few at ERROR level.

    The fact that you've got a couple at ERROR level is actually sort of interesting. And the error message is obviously useless/broken and could be fixed. But it'd also be interesting to know what's causing it. Maybe it's just IPv6? If you wanted to send more info about the problematic DNS packets (or a capture), we might be able to fix that.

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  • weixin_39548972 weixin_39548972 2020-12-30 13:19

    Hi Murphy, Sorry I do not to how to find more info on the problematic dns packet

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  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    I glanced at the DNS code and didn't immediately see how the IP parsing errors happen, at least on eel. Without a reproducible test case, I don't think it's likely this will get resolved, so I'm closing the issue. Hopefully it'll come back up again in a reproducible way someday. (Or maybe it's already been fixed?)

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  • weixin_39876595 weixin_39876595 2020-12-30 13:19

    I think it is an IPv6 issue. I can reproduce the error using "dig". When I run the command "dig google.com A" the error is not reported. However, using "dig google.com AAAA" I got these error messages.

    Ps. I'm using the last POX version.

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  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    Thanks for the info. Could you do two things?

    1) Confirm that by "the last POX version", you mean the eel branch 2) Show the POX log when you do "dig google.com AAAA"

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  • weixin_39876595 weixin_39876595 2020-12-30 13:19

    Sorry, it's really an error related carp branch. It's not reproducible in current eel branch.

    [for future readers]

    Please update you POX version pointing to eel branch.

    git clone -b eel https://github.com/noxrepo/pox.git

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  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    Thanks for confirming that it's been fixed!

    (Also, if you have an existing and up-to-date clone, you can just check out the eel branch.)

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  • weixin_39523835 weixin_39523835 2020-12-30 13:19

    Hi ,

    I was facing the same error of: INFO:packet:(ipv6) warning IP packet data incomplete (114 of 229) INFO:packet:(dns) parsing answers: next_rr: data truncated

    During default POX controller test on mininet-wifi. By any chance, do you know why it happens? is there any way to fix it up?

    Cuz i can have all pings working properly but this notifications on controller do not stop at all...

    Best,

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  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    Sure. It's mentioned in the POX FAQ.

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  • weixin_39531183 weixin_39531183 2020-12-30 13:19

    INFO:packet:(ipv6) warning IP packet data incomplete (114 of 150) INFO:packet:(dns) parsing answers: incomplete name INFO:packet:(ipv6) warning IP packet data incomplete (114 of 150) INFO:packet:(dns) parsing answers: incomplete name INFO:packet:(ipv6) warning IP packet data incomplete (114 of 150) INFO:packet:(dns) parsing answers: incomplete name INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149) INFO:packet:(dns) parsing questions: next_question: truncated INFO:packet:(ipv6) warning IP packet data incomplete (114 of 149)

    Sir please help

    while finding shortest path i am getting this error suggest me any solution or link to find shotrest path

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  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    I don't see any errors there. Mostly I just see info messages from the packet subsystem, very much like the post two above yours. Which, as explained in the FAQ entry linked to in the message directly above yours, aren't necessarily indicative of a problem.

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  • weixin_39531183 weixin_39531183 2020-12-30 13:19

    sir , i am new to sdn i am doing project on multi path routing traffic must move in shortest path wen path congested it must move to multipath techniques sir can pls suggest me how to do implementation

    On Fri, May 18, 2018 at 12:36 PM Murphy wrote:

    I don't see any errors there. Mostly I just see info messages from the packet subsystem, very much like the post two above yours. Which, as explained in the FAQ entry linked to in the message directly above yours, aren't necessarily indicative of a problem.

    — You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/noxrepo/pox/issues/167#issuecomment-390115389, or mute the thread https://github.com/notifications/unsubscribe-auth/Ahh-da2vw6XczdLGEs6VOwofovv53Wd8ks5tznLhgaJpZM4H2wup .

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  • weixin_40002009 weixin_40002009 2020-12-30 13:19

    That's a very, very broad question. Maybe a good place to start would be understanding a relatively simple shortest path forwarding solution like POX's topo_proactive module. Once you understand that, you may be in a better position to move forward.

    (And if you haven't taken a look at the POX manual, that may be helpful.)

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