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To subscribe or unsubscribe via the World Wide Web, visit https://puck.nether.net/mailman/listinfo/redback-nsp or, via email, send a message with subject or body 'help' to redback-nsp-requ...@puck.nether.net You can reach the person managing the list at redback-nsp-ow...@puck.nether.net When replying, please edit your Subject line so it is more specific than "Re: Contents of redback-nsp digest..." Today's Topics: 1. Re: BGP Flapping after update with malformed ASPATH (Marcin Kuczera) ---------------------------------------------------------------------- Message: 1 Date: Mon, 25 Jun 2018 22:45:47 +0200 From: Marcin Kuczera <mar...@leon.pl> To: redback-nsp@puck.nether.net Subject: Re: [rbak-nsp] BGP Flapping after update with malformed ASPATH Message-ID: <76042bdd-e84d-7924-ede1-81ed02120...@leon.pl> Content-Type: text/plain; charset="utf-8" On 2018-06-21 09:18, ??????? ???????? wrote: > Hello, > > The fix is available on 12.1.1.12p15 version of the software. Does anyone has release notes for p15 ? Marcin > > Thanks. > > 2018-05-30 11:08 GMT+02:00 Marcin Kuczera <mar...@leon.pl > <mailto:mar...@leon.pl>>: > > On 2018-05-29 14:19, Marcin Kuczera wrote: >> On 2018-05-29 13:07, Wojciech Wrona wrote: >>> Marcin Can You tell anything more? I didn't notice any problem >>> in decoded aspath in update message (my post before) what did i >>> wrong ? :) >> AS Path was in fact empty, all ASes in {} brackets were taken >> from confederation, but AS-Path itself was empty, and that should >> not be sent from RouteServer. > An update - after deeper analysing, according to RFC - update was > correct, and SEOS should accept it but: > - this is a very interesting case of misconfiguration that should > not happen in normal usage cases > - can only happen in IX when connected to RS that removes it's AS > as first AS from AS-patch > - it looks like RFC bug, because such config was never considered > as possible and maybe RFC needs to be updated in future to avoid > such cases. > > Regards, > Marcin > > > >> >> Marcin >> >>> >>> Best regards, >>> -- >>> Wojciech Wrona >>> W dniu 29.05.2018 o?12:41, Marcin Kuczera pisze: >>>> >>>> Fixed. >>>> The problem was located in TPIX, and had been fixed. >>>> And that was not a SEOS fault. SEOS behaves correctly. Question >>>> is why Juniper passed malformed update... >>>> >>>> Regards, >>>> Marcin >>>> >>>> On 2018-05-29 10:58, Wojciech Wrona wrote: >>>>> Hi everyone, >>>>> It looks like we've managed to find another strange problem >>>>> with BGP on SEOS. In the night one of our peers session >>>>> started to flap with following message: >>>>> May 29 10:52:01: [0001]: %BGP-6-INFO: 195.149.233.1 UP >>>>> May 29 10:52:15: [0001]: %BGP-6-INFO: 195.149.233.1 DOWN - >>>>> Notification sent >>>>> May 29 10:52:15: [0001]: %BGP-6-INFO: 195.149.233.1 send >>>>> NOTIFICATION: 3/11 (update: malformed ASPATH) with 21 byte >>>>> data. mxReadMs=1555 >>>>> >>>>> It does not look like previously mentioned attribute flag >>>>> error. Does anyone had something simillar ? It is a session >>>>> with route server, so i know about "no enforce first-as" >>>>> option and it is turned on, it was working fine till this >>>>> night with no configuration change on our side. >>>>> >>>>> "show bgp malform update" looks like this: >>>>> May 29 10:52:15 Malformed UPDATE msg (nbr 195.149.233.1, >>>>> context 0x40080001, 77 bytes, repeated 5 times, reason: >>>>> Invalid msg) - >>>>> ?ffff ffff ffff ffff ffff ffff ffff ffff 004d 0200 0000 3240 >>>>> 0101 0040 0212 0104 0000 17d9 0000 183e 0000 1840 0000 1967 >>>>> 4003 04c3 95e9 6480 0404 0000 0000 c007 0800 0073 5fc3 95ef >>>>> ff16 c395 ec >>>>> >>>>> SEOS version SEOS-12.1.1.11p7-Release >>>>> >>>>> Thanks in advance, >>>>> Best regards, >>>>> >>>> >>>> -- >>>> >>>> Marcin Kuczera / Wiceprezes Zarz?du / CTO >>>> +48 32 440 80 71/ marcin.kucz...@leon.pl >>>> <mailto:marcin.kucz...@leon.pl> >>>> >>>> Leon Sp. z o.o. >>>> ul. Kili?skiego 33d, 44-200 Rybnik >>>> http://www.leon.pl/ >>>> >>>> INTERNET | TELEWIZJA | TELEFON >>>> >>>> KRS 0000223101 S?d Rejonowy w Gliwicach >>>> Kapita? zak?adowy 576.700 z? >>>> NIP: 6332068698 >>>> >>>> >>>> >>>> _______________________________________________ >>>> redback-nsp mailing list >>>> redback-nsp@puck.nether.net <mailto:redback-nsp@puck.nether.net> >>>> https://puck.nether.net/mailman/listinfo/redback-nsp >>>> <https://puck.nether.net/mailman/listinfo/redback-nsp> >>> >>> >>> >>> _______________________________________________ >>> redback-nsp mailing list >>> redback-nsp@puck.nether.net <mailto:redback-nsp@puck.nether.net> >>> https://puck.nether.net/mailman/listinfo/redback-nsp >>> <https://puck.nether.net/mailman/listinfo/redback-nsp> >> >> >> -- >> >> Marcin Kuczera / Wiceprezes Zarz?du / CTO >> +48 32 440 80 71/ marcin.kucz...@leon.pl >> <mailto:marcin.kucz...@leon.pl> >> >> Leon Sp. z o.o. >> ul. Kili?skiego 33d, 44-200 Rybnik >> http://www.leon.pl/ >> >> INTERNET | TELEWIZJA | TELEFON >> >> KRS 0000223101 S?d Rejonowy w Gliwicach >> Kapita? zak?adowy 576.700 z? >> NIP: 6332068698 >> >> >> >> _______________________________________________ >> redback-nsp mailing list >> redback-nsp@puck.nether.net <mailto:redback-nsp@puck.nether.net> >> https://puck.nether.net/mailman/listinfo/redback-nsp >> <https://puck.nether.net/mailman/listinfo/redback-nsp> > > > -- > > Marcin Kuczera / Wiceprezes Zarz?du / CTO > +48 32 440 80 71/ marcin.kucz...@leon.pl > <mailto:marcin.kucz...@leon.pl> > > Leon Sp. z o.o. > ul. Kili?skiego 33d, 44-200 Rybnik > http://www.leon.pl/ > > INTERNET | TELEWIZJA | TELEFON > > KRS 0000223101 S?d Rejonowy w Gliwicach > Kapita? zak?adowy 576.700 z? > NIP: 6332068698 > > > _______________________________________________ > redback-nsp mailing list > redback-nsp@puck.nether.net <mailto:redback-nsp@puck.nether.net> > https://puck.nether.net/mailman/listinfo/redback-nsp > <https://puck.nether.net/mailman/listinfo/redback-nsp> > > > > > _______________________________________________ > redback-nsp mailing list > redback-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/redback-nsp -- Marcin Kuczera / Wiceprezes Zarz?du / CTO +48 32 440 80 71/ marcin.kucz...@leon.pl <mailto:marcin.kucz...@leon.pl> Leon Sp. z o.o. ul. Kili?skiego 33d, 44-200 Rybnik http://www.leon.pl/ INTERNET | TELEWIZJA | TELEFON KRS 0000223101 S?d Rejonowy w Gliwicach Kapita? zak?adowy 576.700 z? NIP: 6332068698 -------------- next part -------------- An HTML attachment was scrubbed... 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