<div dir="ltr">Hello,<div><br></div><div>The fix is available on 12.1.1.12p15 version of the software.</div><div><br></div><div>Thanks.</div></div><div class="gmail_extra"><br><div class="gmail_quote">2018-05-30 11:08 GMT+02:00 Marcin Kuczera <span dir="ltr"><<a href="mailto:marcin@leon.pl" target="_blank">marcin@leon.pl</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"><span class="">
<div class="m_-2497503179155628254moz-cite-prefix">On 2018-05-29 14:19, Marcin Kuczera
wrote:<br>
</div>
<blockquote type="cite">
<div class="m_-2497503179155628254moz-cite-prefix">On 2018-05-29 13:07, Wojciech Wrona
wrote:<br>
</div>
<blockquote type="cite">
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 ? :)<br>
</blockquote>
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.<br>
</blockquote></span>
An update - after deeper analysing, according to RFC - update was
correct, and SEOS should accept it but:<br>
- this is a very interesting case of misconfiguration that should
not happen in normal usage cases<br>
- can only happen in IX when connected to RS that removes it's AS as
first AS from AS-patch<br>
- 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.<br>
<br>
Regards,<br>
Marcin<div><div class="h5"><br>
<br>
<br>
<blockquote type="cite"> <br>
Marcin<br>
<br>
<blockquote type="cite"> <br>
Best regards,<br>
<pre class="m_-2497503179155628254moz-signature" cols="72">--
Wojciech Wrona</pre>
<div class="m_-2497503179155628254moz-cite-prefix">W dniu 29.05.2018 o 12:41, Marcin
Kuczera pisze:<br>
</div>
<blockquote type="cite">
<div class="m_-2497503179155628254moz-cite-prefix"><br>
Fixed.<br>
The problem was located in TPIX, and had been fixed.<br>
And that was not a SEOS fault. SEOS behaves correctly.
Question is why Juniper passed malformed update...<br>
<br>
Regards,<br>
Marcin<br>
<br>
On 2018-05-29 10:58, Wojciech Wrona wrote:<br>
</div>
<blockquote type="cite">Hi
everyone, <br>
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: <br>
May 29 10:52:01: [0001]: %BGP-6-INFO: 195.149.233.1 UP <br>
May 29 10:52:15: [0001]: %BGP-6-INFO: 195.149.233.1 DOWN -
Notification sent <br>
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 <br>
<br>
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. <br>
<br>
"show bgp malform update" looks like this: <br>
May 29 10:52:15 Malformed UPDATE msg (nbr 195.149.233.1,
context 0x40080001, 77 bytes, repeated 5 times, reason:
Invalid msg) - <br>
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 <br>
<br>
SEOS version SEOS-12.1.1.11p7-Release <br>
<br>
Thanks in advance, <br>
Best regards, <br>
<br>
</blockquote>
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<span id="m_-2497503179155628254address-sep"><br>
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