nanog mailing list archives
Re: Internet Exchange Point(IXP) questions
From: "Yaoqing(Joey) Liu" <joey.liuyq () gmail com>
Date: Thu, 17 Feb 2011 21:04:24 -0600
On Thu, Feb 17, 2011 at 8:17 PM, Michael K. Smith - Adhost < mksmith () adhost com> wrote:
-----Original Message----- From: Yaoqing(Joey) Liu [mailto:joey.liuyq () gmail com] Sent: Thursday, February 17, 2011 6:03 PM To: nanog () nanog org Subject: Internet Exchange Point(IXP) questions I'm doing some research on multiple origin AS problems of IXPs. As Iknow,generally there are two types of IXPs type 1: use exchange routers, which works in layer 3 type 2: use switches and Ethernet topology, which works in layer 2. So I have a couple of qustions: 1. For type 1, the exchange routers may use several IP prefixes forrouting,how often does the IP prefixes have their own AS? 2. For type 2, all peers connected to the IXP must work in the samesubnetrequired by Ethernet rules. Is possible that the subnet IP prefixesbelongto some private IP address space, such as 192.168.x.x? How often doesthishappen? If the subnet only contains public IP addresses, how are the addresses announced? Thanks, YaoqingHello: On the Seattle Internet Exchange (SIX) we have ARIN-assigned addresses that we use on the Layer 2 fabric (your type 2 above). Hopefully the addresses aren't being announced at all, although we sometimes have to chase down people that announce it. Those addresses aren't the destination for any traffic, they are merely part of the transport to a destination, so there is no need for them to be in the DFZ.
But I just checked the IXP prefix list, and found SIX owns prefix 206.81.80.0/23. And it has been announced by three ASNs, AS11537(Internet 2), AS3130(RGnet, LLC) and AS25973(Mzima Networks, Inc). I'm not sure if my info is correct. Does SIX own its own ASN other than the three above? Yaoqing
Regards, Mike -- Michael K. Smith - CISSP, GSEC, GISP Chief Technical Officer - Adhost Internet LLC mksmith () adhost com w: +1 (206) 404-9500 f: +1 (206) 404-9050 PGP: B49A DDF5 8611 27F3 08B9 84BB E61E 38C0 (Key ID: 0x9A96777D)
Current thread:
- Internet Exchange Point(IXP) questions Yaoqing(Joey) Liu (Feb 17)
- RE: Internet Exchange Point(IXP) questions Michael K. Smith - Adhost (Feb 17)
- Re: Internet Exchange Point(IXP) questions Leo Bicknell (Feb 17)
- Re: Internet Exchange Point(IXP) questions Randy Bush (Feb 17)
- Re: Internet Exchange Point(IXP) questions Yaoqing(Joey) Liu (Feb 17)
- RE: Internet Exchange Point(IXP) questions Michael K. Smith - Adhost (Feb 18)
- RE: Internet Exchange Point(IXP) questions Michael K. Smith - Adhost (Feb 18)
- Re: Internet Exchange Point(IXP) questions Christopher Morrow (Feb 18)
- RE: Internet Exchange Point(IXP) questions Michael K. Smith - Adhost (Feb 18)
- Re: Internet Exchange Point(IXP) questions Christopher Morrow (Feb 18)
- Re: Internet Exchange Point(IXP) questions Leo Bicknell (Feb 18)
- Re: Internet Exchange Point(IXP) questions Christopher Morrow (Feb 18)
- Re: Internet Exchange Point(IXP) questions Leo Bicknell (Feb 17)
- RE: Internet Exchange Point(IXP) questions Michael K. Smith - Adhost (Feb 17)
- Re: Internet Exchange Point(IXP) questions Joe Abley (Feb 18)
- Re: Internet Exchange Point(IXP) questions Leo Bicknell (Feb 18)
- Re: Internet Exchange Point(IXP) questions Christopher Morrow (Feb 18)