North American Network Operators Group|
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Re: Alternative to BGP-4 for multihoming?
> > > sure but which one are they most likely to be using for their > > resolver (in firewalled environments it may be none of those)? > > the caching server provided by the dialup global isp. Be fair to the guy - the caching server (not authoritative server) is normally net.near the dialup client. It may be (mentioning no global ISPs we know) that the call is hauled halfway across the US / World to get to the one large datacenter containing both the caching DNS server and the connectivity to between that provider and the internet, but even so, serving pages from a machine close to the data center is in that case better than serving pages from a machine close to the user (unless you like tromboning data). But yes, this technique sucks for regional content. And yes, ICMP is not a good measure of connectivity. -- Alex Bligh VP Core Network, Concentric Network Corporation (formerly GX Networks, Xara Networks)