North American Network Operators Group|
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical
Re: NAT Multihoming (was:Re: NANOG 40 agenda posted)
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.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.