NAT Multihoming (was:Re: NANOG 40 agenda posted)

Donald Stahl don at
Sat Jun 2 20:59:29 UTC 2007

> 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.
When an ISP's caching name servers ignore your 3600 TTL and substitute an 
86400 TTL you end up disconnected for ~12 hours instead of ~30 minutes- 
That's unacceptable for a almost any company willing to go through the 
trouble of getting an ASN.


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