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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical NAT Multihoming (was:Re: NANOG 40 agenda posted)
On Friday 01 June 2007, Vince Fuller wrote: > If you think about it, the NAT approach actually offers the possibility of > improved routing scalability: site multihomed with NATs connected to each > of its providers could use topologically-significant (read "PA") global > addresses on the NATs while using the same private address space on their > network. Cisco has a whitepaper entitled "Enabling Enterprise Multihoming with Cisco IOS NAT" that addresses this. See http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a0080091c8a.shtml as well as RFC2260. There are indeed a few thorny issues with this approach; the largest issue is that all connectivity becomes DNS-dependent and raw IP addresses (from both the inside and outside) become virtually useless. Running servers behind this scheme, while doable, is difficult. -- Lamar Owen Chief Information Officer Pisgah Astronomical Research Institute 1 PARI Drive Rosman, NC 28772 (828)862-5554 www.pari.edu
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