Saudi Telecom sending route with invalid attributes 212.118.142.0/24

Schiller, Heather A heather.schiller at verizon.com
Mon Sep 12 20:18:55 CDT 2011


Could be this..?

http://www.juniper.net/techpubs/en_US/junos11.2/topics/reference/configuration-statement/independent-domain-edit-routing-options.html  

"unrecognized transitive attributes" depend on whatever code version you are running... What's more important is how the unrecoginized attribute is handled.  Ideally you accept and pass the route and log it.  The problem is with devices that aren't so graceful.. dropping sessions and wreaking havoc:

http://www.cisco.com/warp/public/707/cisco-sa-20100827-bgp.shtml

--Heather 

-----Original Message-----
From: Aftab Siddiqui [mailto:aftab.siddiqui at gmail.com] 
Sent: Saturday, September 10, 2011 6:49 PM
To: Richard Barnes
Cc: Jonas Frey (Probe Networks); nanog at nanog.org
Subject: Re: Saudi Telecom sending route with invalid attributes 212.118.142.0/24

with in the span of couple of hours this prefix was originated from 3 ASN i.e. AS3561 (Savvis), AS8866 (BTC) and AS25019 (STC original custodians).

As per the STC it was orginated by one of their customer having Juniper router. but I still don't understand why/how they are adv this prefix with unrecog transitive attributes.

Can any one suggest.

Regards,

Aftab A. Siddiqui


On Sun, Sep 11, 2011 at 3:26 AM, Richard Barnes <richard.barnes at gmail.com>wrote:

> Looks like the RIS collectors are seeing it originating mostly from 
> STC and KACST ASNs:
> <http://stat.ripe.net/212.118.142.0/24>
>
> Some of the "show ip bgp" reports on that screen are also showing
> AS8866 "BTC-AS Bulgarian Telecommunication Company".  Not sure what's 
> up with that.
>
> --Richard
>
>
>
> On Sat, Sep 10, 2011 at 2:01 PM, Christopher Morrow 
> <morrowc.lists at gmail.com> wrote:
> > On Fri, Sep 9, 2011 at 9:26 PM, Kyle Duren <pixitha.kyle at gmail.com>
> wrote:
> >> Is this announcement still showing up this way (no easy way to 
> >> check myself).
> >
> > ripe ris?
> >
> >> -Kyle
> >>
> >> On Thu, Sep 8, 2011 at 4:20 PM, Clay Haynes 
> >> <chaynes at centracomm.net>
> wrote:
> >>
> >>> On Thu, Sep 8, 2011 at 7:11 PM, Jonas Frey (Probe Networks) < 
> >>> jf at probe-networks.de> wrote:
> >>>
> >>> > Hello,
> >>> >
> >>> > anyone else getting a route for 212.118.142.0/24 with invalid 
> >>> > attributes? Seems this is (again) causing problems with some 
> >>> > (older) routers/software.
> >>> >
> >>> >               Announcement bits (4): 0-KRT 3-KRT 5-Resolve tree 
> >>> > 1 6-Resolve tree 2
> >>> >                AS path: 6453 39386 25019 I Unrecognized Attributes:
> 39
> >>> > bytes
> >>> >                AS path:  Attr flags e0 code 80: 00 00 fd 88 40 
> >>> > 01 01
> 02
> >>> > 40 02 04 02 01 5b a0 c0 11 04 02 01 fc da 80 04 04 00 00 00 01 
> >>> > 40 05
> 04
> >>> > 00 00 00 64
> >>> >                Accepted Multipath
> >>> >
> >>> >
> >>> > -Jonas
> >>> >
> >>> >
> >>> Yup! We're seeing the same thing too, and we're filtering it out.
> >>> Originating AS is 25019
> >>>
> >>> -Clay
> >>>
> >>
> >
> >
>
>



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