nanog mailing list archives
Re: NANOG Digest, Vol 38, Issue 26
From: "Yaoqing(Joey) Liu" <joey.liuyq () gmail com>
Date: Mon, 7 Mar 2011 21:14:41 -0600
Message: 9 Date: Mon, 7 Mar 2011 11:32:39 -0600 From: "Yaoqing(Joey) Liu" <joey.liuyq () gmail com> Subject: About the different causes of multiple origin ASN(MOAS) problem To: nanog () nanog org Message-ID: <AANLkTi=RpzYDhcroH2043uiA7XDa0Apo2cHhu6y6XC6V () mail gmail com> Content-Type: text/plain; charset=ISO-8859-1 Hi, I'm trying to find all causes of multiple origin AS problem(MOAS) as follows, but not sure if it's complete. Also please let me know how popular each item is, especially item 3 and 4 that I'm very curious about. 1. Internet Exchange Points, we have observed a list of this prefixes, although they generally are not announced to the DFZ. 2. Anycast, rare, but occurs sometimes, for example, 192.88.99.0/24, 2002::/16, and 2001::/32 3. Multi-homing with Private AS number 4. Multi-homing using static route (customer doesn't have AS number) 5. Misconfiguration 6. Hijacking 7. What else? Thanks, Yaoqing ------------------------------ Message: 10 Date: Tue, 8 Mar 2011 01:02:19 +0000 From: "Dobbins, Roland" <rdobbins () arbor net> Subject: Re: About the different causes of multiple origin ASN(MOAS) problem To: nanog group <nanog () nanog org> Message-ID: <6A23D7CB-9DA4-48DF-B655-B1397C573BF6 () arbor net> Content-Type: text/plain; charset="us-ascii" On Mar 8, 2011, at 1:32 AM, Yaoqing(Joey) Liu wrote:I'm trying to find all causes of multiple origin AS problem(MOAS) as follows, but not sure if it's complete.1. MOAS isn't necessarily a 'problem'; it's fairly common, these days, and has been for quite some time. The actual problem is the inability to determine when it's intentional and not evil, vs. unintentional or intentional and evil.
Good point. That's why I need to have a complete cause list first, then I can try to tell the evil from the good.
2. There's already a fair body of work on this topic, as a Web search for "multiple origin as" reveals. Check the NANOG archives for Lixia's preso, among others.
I know a lot of previous work about MOAS, but they were not comprehensive enough to drill down to the prefix level and also the results have been outdated. We need to know what things were going on recently. Yaoqing
----------------------------------------------------------------------- Roland Dobbins <rdobbins () arbor net> // <http://www.arbornetworks.com> The basis of optimism is sheer terror. -- Oscar Wilde ------------------------------ _______________________________________________ NANOG mailing list NANOG () nanog org https://mailman.nanog.org/mailman/listinfo/nanog End of NANOG Digest, Vol 38, Issue 26 *************************************
Current thread:
- Re: NANOG Digest, Vol 38, Issue 26 Yaoqing(Joey) Liu (Mar 07)
- Re: NANOG Digest, Vol 38, Issue 26 Randy Bush (Mar 07)
- Re: NANOG Digest, Vol 38, Issue 26 Yaoqing(Joey) Liu (Mar 07)
- Re: NANOG Digest, Vol 38, Issue 26 Randy Bush (Mar 07)