Re: Alternative to BGP-4 for multihoming?

[Alex Bligh <amb () gxn net>]

> > 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)